Welch Research Group Publications

2020

Near-IR Absorption and Photocurrent Generation Using a First-of-Its-Kind Boron Difluoride Formazanate Non-Fullerene Acceptor

Materials Chemistry Frontiers - Emerging Organic Electronics Special Issue

Josh D. B. Koenig, Mahmoud E. Farahat, Jasveer S. Dhindsa, Joe B. Gilroy, Gregory C. Welch

Diketopyrrolopyrrole Derivatives Functionalized with N-Annulated PDI and Se-Annulated PDI by Direct (Hetero)Arylation Methods

Asian Journal of Organic Chemistry​ - Organic donor–acceptor (D–A) molecules/complexes Special issue             

Thomas Welsh, Maryam Nazari, Gregory C. Welch

Indeno[1,2-b]thiophene End-capped Perylene Diimide: Should the 1,6-Regioisomers be systematically considered as a contaminant?

Scientific Reports

Pablo Marques, Francesco Tintori, Jose Castan, Pierre Josse, Gregory C. Welch, Philippe Blanchard, Clement Cabanetos

Solution Processed Red Organic Light-Emitting-Diodes using an N-Annulated Perylene Diimide Fluorophore

Journal of Materials Chemistry C

Sergey Dayneko, Mohammad Rahmati, Majid Pahlevani, Gregory C. Welch

Interlayer Engineering of Flexible and Large Area Red Organic Light Emitting Diodes based on an N-Annulated Perylene Diimide Dimer​

ACS Applied Electronic Materials - Young investigators forum 

Mohammad Rahmati, Sergey Dayneko, Majid Pahlevani, Gregory C. Welch

2019

Indoor Photovoltaics: Photoactive Material Selection, Greener Ink Formulations, and Slot-Die Coated Active Layers​

ACS Applied Materials and Interfaces

Sergey Dayneko, Majid Pahlevani, Gregory C. Welch

Harnessing Direct(Hetero)Arylation in Pursuit of a Saddle-Shaped Perylene Diimide Tetramer

ACS Applied Energy Materials

Josh Koeing, Audrey Laventure, Gregory C. Welch

Perylene Diimide based Organic Photovoltaics with Slot-Die Coated Active Layers from Halogen-Free Solvents in Air at Room Temperature​

ACS Applied Materials and Interfaces

Francesco Tintori, Audrey Laventure, Gregory C. Welch

Boron-Nitrogen Substituted Dihydroindeno[1,2-b]fluorene Derivatives as Acceptors in Organic Solar Cells​

Chemical Communications

Matthew M. Morgan,  Maryam Nazari,  Thomas Pickl,  J. Mikko Rautiainen,  Heikki M. Tuononen,  Warren Piers,  Gregory C. Welch, Benjamin Sidney Gelfand

Interfacial ZnO Modification Using a Carboxylic Acid Functionalized N-Annulated Perylene Diimide for Inverted Type Organic Photovoltaics

ACS Applied Electronic Materials

Marwa Abd-Ellah, Jonathan R. Cann, Sergey V. Dayneko, Audrey Laventure, Edward Cieplechowicz, Gregory C. Welch

Screening Quinoxaline-Type Donor Polymers for Roll-to-Roll Processing Compatible Organic Photovoltaics

ACS Applied Polymer Materials

Audrey Laventure, Cayley R. Harding, Edward Cieplechowicz, Zhe Li, Ju Wang, Yingping Zou, Gregory C. Welch

Ternary Organic Solar Cells: Using Molecular Donor or Acceptor Third Components to Increase Open Circuit Voltage

New Journal of Chemistry

Sergey Dayneko, Arthur Hendsbee, Jonathan Cann, Clement Cabanetos, Gregory C. Welch

Additive Induced Crystallization of a Twisted Perylene Diimide Dimer Within a Polymer Matrix

Soft Matter

Francesco Tintori, Audrey Laventure, Gregory C. Welch 

Synthesis of Aromatic Imide Tetramers Relevant to Organic Electronics by Direct (Hetero)Arylation

New Journal of Chemistry

Thomas Welsh, Abby-Jo Payne, Gregory C. Welch

Electrocatalytic CO2 Reduction at Lower Overpotentials Using Iron(III) tetra(meso-thienyl)porphyrins​

ACS Applied Energy Materials

Josh KoenigJanina WillkommRoland RoeslerWarren E. Piers, and Gregory C. Welch

Ligand-Centered Electrochemical Processes Enable CO2 Reduction with a Nickel Bis(triazapentadienyl) Complex​

Sustainable Energy and Fuels

Zachary Dubrawski,  Joshua Heidebrecht,  Braulio M. Puerta Lombardi,  Alexander S. Hyla,  Janina Willkomm,  Chase L. Radford,  Jian-Bin Lin,  Gregory C. Welch,  Sathish Ponnurangam,  Roland Roesler,  Demyan E. Prokopchuk, Warren E. Piers

A Direct Comparison of Monomeric vs Dimeric and Non-Annulated vs N-Annulated Perylene Diimide Electron Acceptors for Organic Photovoltaics​

New Journal of Chemistry

Maryam NazariEdward CieplechowiczThomas Welsh, Gregory C. Welch

A Ring Fused N-Annulated PDI Non-Fullerene Acceptor for High Open Circuit Voltage Solar Cells Processed from Non-Halogenated Solvents

Synthetic Metals - Early Career Leaders Special Issue

AudreyLaventure, SamanthaStanzel, Abby-JoPayne, Benoît H.Lessard, Gregory C.Welch

Using Boron to Tune the Geometry of a Non-Fullerene Acceptor for Improved Organic Solar Cell Performance

ACS Applied Energy Materials

Thomas WelshAudrey LaventureAbdullah AlahmadiGuanghui ZhangThomas BaumgartnerYingping ZouFrieder Jäkle, and Gregory C. Welch

Development of Organic Dye-Based Molecular Materials for Use in Fullerene-Free Organic Solar Cells​

The Chemical Record - Organic Solar Cells Special Issue

Seth M. McAfee and Gregory C. Welch

2018

Synthesis of Molecular Dyads and Triads based upon N‐Annulated Perylene Diimide Monomers and Dimers​

European Journal of Organic Chemistry

Jonathan Cann, Clement Cabanetos, Gregory C. Welch

A Triazatruxene based Molecular Dyad for Single-Component Organic Solar Cells

Chemistry2

Antoine Labrunie, Giacomo Londi, Sergey V. Dayneko, Martin Blais, Sylvie Dabos-Seignon, Gregory C. Welch, David Beljonne, Philippe Blanchard, Clement Cabanetos

Benzyl and Fluorinated Benzyl Side Chains for Perylene Diimide Non-Fullerene Acceptors

Materials Chemistry Frontiers

Maryam Nazari, Mark Martell, Thomas Welsh, Owen Melville, Zhe Li, Jonathan Cann, Edward Cieplechowicz, Yingping Zou, Benoit Lessard, Gregory C. Welch

A Tetrameric Perylene Diimide Non-Fullerene Acceptor via Unprecedented Direct (Hetero)arylation Cross-Coupling Reactions

Chemical Communications

Abby-Jo Payne, Jiali Song, Yanming Sun, Gregory C. Welch

A Tetrachlorinated Molecular Non-fullerene Acceptor for High Performance Near-IR Absorbing Organic Solar Cells

Journal of Materials Chemistry C

Audrey Laventure, Gregory C. Welch

Control and Characterization of Organic Solar Cell Morphology Through Variable-Pressure Solvent Vapor Annealing

ACS Applied Energy Materials

Derek Zomerman, Jessica Kong, Seth M. McAfee, Gregory C. Welch, Timothy L. Kelly

Donor or Acceptor? How Selection of Rylene Imide Endcap Impacts Polarity of π-Conjugated Molecules for Organic Electronics

ACS Applied Energy Materials

Abby-Jo Payne, Nicole Rice, Seth M McAfee, Shi LI, Pierre Josse, Clement Cabanetos, Chad Risko, Benoit H. Lessard, Gregory C. Welch

Synthesis of a Perylene Diimide Dimer with Pyrrolic N‐H Bonds and N‐Functionalized Derivatives for Organic Field‐Effect Transistors and Organic Solar Cells​

European Journal of Organic Chemistry

Marcus Vespa, Jonathan Cann, Sergey Dayneko, Owen Melville, Arthur Hendsbee, Yinping Zhou, Benoit Lessard, Gregory C. Welch

Toward a Universally Compatible Non‐Fullerene Acceptor: Multi‐Gram Synthesis, Solvent Vapor Annealing Optimization, and BDT‐Based Polymer Screening​

Solar RRL

Seth M. McAfee, Abby-Jo Payne, Arthur D. Hendsbee, Shutao Xu, Yingping Zou, Gregory C. Welch

Combining Facile Synthetic Methods with Greener Processing for Efficient Polymer‐Perylene Diimide Based Organic Solar Cells

Small Methods

Sergey V. Dayneko, Arthur D. Hendsbee, Gregory C. Welch

Direct (Hetero)Arylation Polymerization of a Spirobifluorene and a Dithienyl-Diketopyrrolopyrrole Derivative: New Donor Polymers for Organic Solar Cells​

Molecules - Direct (Hetero)arylation Special Issue guest edited by Prof. Mario Leclerc

Pierre Josse, Sergey Dayneko, Yangqian Zhang, Sylvie Dabos-Seignon, Shiming Zhang, Philippe Blanchard, Gregory C. Welch, and Clement Cabanetos

Direct (Hetero)Arylation for the Synthesis of Molecular Materials: Coupling Thieno[3,4-c]pyrrole-4,6-dione with Perylene Diimide to Yield Novel Non-Fullerene Acceptors for Organic Solar Cells​

Molecules - Direct (Hetero)arylation Special Issue guest edited by Prof. Mario Leclerc

Thomas A. Welsh, Audrey Laventure, Gregory C. Welch

Inverted P3HT:PC61BM Organic Solar Sells Incorporating a π-Extended Squaraine Dye with H- and (or) J-Aggregation

Canadian Journal of Chemistry - Dalhousie University Special Issue

Sergey Dayneko, Abby-Jo Payne, Gregory C. Welch

Organic Solar Cells based on Anthracene-Containing PPE–PPVs and Non-Fullerene Acceptors

Chemical Papers - 81st Macromolecular Symposium, Prague, Special Issue

Shahidul Alam, Rico Meitzner, Ogechi V. Nwadiaru, Christian Friebe, Jonathan Cann, Johannes Ahner, Christoph Ulbricht, Zhipeng Kan, Stephanie Höppener, Martin D. Hager, Daniel A. M. Egbe, Gregory C. Welch, Frédéric Laquai, Ulrich S. Schubert, Harald Hoppe

Optoelectronic Engineering with Organic Dyes: Utilizing Squaraine and Perylene Diimide to Access an Electron-Deficient Molecule with Near-IR Absorption

Chemical Papers - 81st Macromolecular Symposium, Prague, Special Issue

Abby-Jo Payne, Seth M. McAfee, Gregory C. Welch

Dithienophosphole-based Molecular Electron Acceptors Constructed using Direct (Hetero)arylation Cross-coupling Methods

Journal of Materials Chemistry C

Thomas Welsh, Audrey Laventure, Thomas Baumgartner, Gregory C. Welch

Bromination of the Benzothioxanthene Bloc: Toward New pi-Conjugated Systems for Organic Electronics

Journal of Materials Chemistry C

Pierre Josse, Shi Li, Sergey Dayneko, Damien Joly, Antonie Labrunie, Sylvie Dabos-Seignon, Magali Allain, Benjamin Siegler, Renaud Demadrille, Gregory C. Welch, Chad Risko, Philippe Blanchard, Clement Cabanetos

Exploiting Direct Heteroarylation Polymerization Homocoupling Defects for the Synthesis of a Molecular Dimer

New Journal of Chemistry - Cover Article

Willem B. Breukelaar, Seth M. McAfee, Gregory C. Welch

2017

Spectroscopic Engineering toward Near-Infrared Absorption of Materials Containing Perylene Diimide

ChemPlusChem

Jonathan Cann, Clement Cabanetos, Gregory C. Welch

An Unsymmetrical Non-Fullerene Acceptor: Synthesis via Direct Heteroarylation, Self-Assembly, and Utility as a Low Energy Absorber in Organic Photovoltaic Cells

Chemical Communications

Abby-Jo Payne, Shi Li, Sergey V. Dayneko, Chad Risko, and Gregory C. Welch

A Non-Fullerene Acceptor with a Diagnostic Morphological Handle for Streamlined Screening of Donor Materials in Organic Solar Cells

Journal of Materials Chemistry A

Seth M. McAfee, Abby-Jo Payne, Sergey V. Dayneko, Gururaj P. Kini, Chang Eun Song, Jong-Cheol Lee, and Gregory C. Welch

 

Thienoisoindigo End-capped Molecular Donors for Organic Photovoltaics: Effect of the Central π-Conjugated Connector

Dyes and Pigments

Pierre Josse, Sylvie Dabos-Seignon, Seth M. McAfee, Gregory C. Welch, Philippe Blanchard and Clément Cabanetos

Optimized Synthesis of π-Extended Squaraine Dyes Relevant to Organic Electronics by Direct (Hetero)Arylation and Sonogashira Coupling Reactions

Organic & Biomolecular Chemistry - Special Issue - CSC100: Celebrating Canadian Chemistry

Abby-Jo Payne, and Gregory C. Welch

N-Annulated Perylene Diimide Dimers: The Effect of Thiophene Bridges on Physical, Electronic, Optical, and Photovoltaic Properties

Sustainable Energy & Fuels - Special Issue - CSC100: Celebrating Canadian Chemistry

Arthur D. HendsbeeSergey V. Dayneko, Jefferson A. Pells, Jonathan R. Cann, and Gregory C. Welch

Applying Direct Heteroarylation Synthesis to Evaluate Organic Dyes as the Core Component in PDI-based Molecular Materials for Fullerene-Free Organic Solar Cells

Journal of Materials Chemistry A - Special Issue - Emerging Investigators 2017 & CSC100: Celebrating Canadian Chemistry

Seth M. McAfeeSergey V. Dayneko, Arthur D. Hendsbee, Pierre JossePhilippe BlanchardClément Cabanetos, and Gregory C. Welch

N-Annulated Perylene Diimide Dimers: Acetylene Linkers as a Strategy for Controlling Structural Conformation and The Impact on Physical, Electronic, Optical and Photovoltaic Properties

Journal of Materials Chemistry C - Special Issue - CSC100: Celebrating Canadian Chemistry

Jonathan CannSergey V. DaynekoJon-Paul SunArthur D. HendsbeeIan G. Hill, and Gregory C. Welch

Simply Complex: The Efficient Synthesis of an Intricate Molecular Acceptor for High-Performance Air-Processed and Air-Tested Fullerene-free Organic Solar Cells

Chemistry of Materials

Seth M. McAfeeSergey V. DaynekoPierre JossePhilippe BlanchardClément Cabanetos, and Gregory C. Welch

Fullerene-free Polymer Solar Cells Processed from Non-Halogenated Solvents in Air with PCE of 4.8%

Chemical Communications

Sergey V. Dayneko, Arthur D. Hendsbee and Gregory C. Welch

Thiophene vs Thiazole: Effect of the pi-Connector on the Properties of Phthalimide End-Capped Diketopyrrolopyrrole based Molecular Acceptors for Organic Photovoltaics

Dyes and Pigments

Pierre Josse, Patricia Chavez, Chloé Dindault, Clément Dalinot, Seth M. McAfee, Sylvie Dabos-Seignon, Denis Tondelier, Gregory C. Welch, Philippe Blanchard, Nicolas Leclerc, and Clément Cabanetos

2016

Synthesis, Self-Assembly, and Solar Cell Performance of N-Annulated Perylene Diimide Non-Fullerene Acceptors

Chemistry of Materials

Arthur D. Hendsbee, Jon-Paul Sun, Way Kit Law, He Yan, Ian G. Hill, Denis M. Spasyuk and Gregory C. Welch

Effect of Side Chains on the Electronic and Photovoltaic Properties of Diketopyrrolopyrrole-based Molecular Acceptors

Organic Electronics

Pierre Josse, Antoine Labrunie, Clément Dalinot, Seth M. McAfee, Sylvie Dabos-Seignon, Jean Roncali, Gregory C. Welch, Phillippe Blanchard and Clément Cabanetos

Perylene Diimide Based All Small-Molecule Organic Solar Cells: Impact of Branched-alkyl Side Chains on Solubility, Photophysics, Self-assembly, and Photovoltaic Parameters

Organic Electronics

Jon-Paul Sun, Arthur D. Hendsbee, Alexander J. Dobson, Gregory C. Welch and Ian G. Hill

 

Development of Low Band Gap Molecular Donors with Phthalimide Terminal Groups for use in Solution Processed Organic Solar Cells

Dyes and Pigments

Ronan San Juan, Abby-Jo Payne, Gregory C. Welch and Ala'a F. Eftaiha

 

Synthesis and Structure-Property Relationships of Phthalimide and Naphthalimide based Organic pi-Conjugated Small Molecules

Physical Chemistry Chemical Physics

Abby-Jo Payne, Arthur D. Hendsbee, Seth M. McAfee, Devproshad K. Paul, Kunal Karan and Gregory C. Welch

 

The Optimization of Direct Heteroarylation and Sonogashira Cross-Coupling Reactions as Efficient and Sustainable Synthetic Methods to Access pi-Conjugated Materials with Near-Infrared Absorption

ACS Sustainable Chemistry and Engineering

Seth M. McAfee, Jonathan R. Cann, Pierre Josse, Phillippe Blanchard, Clement Cabanetos, and Gregory C. Welch

Understanding the Morphology of Solution Processed Fullerene-free Small Molecule Bulk Heterojunction Blends

Physical Chemistry Chemical Physics

Andrew M. Namespetra, Elizabeth Kitching, Ala'a F. Eftaiha,  Ian G. Hill and Gregory C. Welch

 

Development of Simple Hole-transporting Materials for Perovskite Solar Cells

Canadian Journal of Chemistry - University of Calgary Special Issue

Andrew M. Namespetra, Arthur D. Hendsbee, Gregory C. Welch and Ian G. Hill

 

2015

Pivotal Factors in Solution-Processed, Non-Fullerene, All Small-Molecule Organic Solar Cell Device Optimization

Organic Electronics

Jessica M. Topple, Seth M. McAfee, Gregory C. Welch and Ian G. Hill

 

The Structural Evolution of an Isoindigo-based Non-Fullerene Acceptor for Use in Organic Photovoltaics

RSC Advances

Seth M. McAfee, Jessica M. Topple, Jon-Paul Sun, Ian G. Hill and Gregory C. Welch

 

Chapter 5: Design and Synthesis of Small Molecule Donors for High Efficiency Solution Processed Organic Solar Cells

Polymer Photovoltaics: Materials, Physics and Device Engineering (RSC Publishing)

Seth M. McAfee, Gregory C. Welch and Corey V. Hoven

 

Phthalimide-based pi-Conjugated Small Molecules with Tailored Electronic Energy Levels for Use as Acceptors in Organic Solar Cells

Journal of Materials Chemistry C

Arthur D. Hendsbee, Seth M. McAfee, Jon-Paul Sun, Theresa M. McCormick, Ian G. Hill and Gregory C. Welch

Indoloquinoxaline as a Terminal Building Block for the Construction of pi-Conjugated Small Molecules Relevant to Organic Electronics

Dyes and Pigments

Abby-Jo Payne, Jenny S. J. McCahill and Gregory C. Welch

Key Components to the Recent Performance Increases of Solution Processed Non-Fullerene Small Molecule Acceptors

Journal of Materials Chemistry A

Seth M. McAfee, Jessica M. Topple, Ian G. Hill and Gregory C. Welch

Facile Synthesis of Unsymmetrical and pi-Extended Furan-Diketopyrrolopyrrole Derivatives Through C-H Direct (Hetero)Arylation Using a Heterogeneous Catalyst System

New Journal of Chemistry

Jetsuda Areephong, Arthur D. Hendsbee and Gregory C. Welch

A Narrow Band Gap Isoindigo Based Molecular Donor for Solution Processed Organic Solar Cells

New Journal of Chemistry

Jetsuda Areephong, Ronan R. San Juan, Abby-Jo Payne and Gregory C. Welch 

Utility of a Heterogeneous Palladium Catalyst for the Synthesis of a Molecular Semiconductor via Stille, Suzuki and Direct Heteroarylation Cross-Coupling Reactions

RSC Advances

Seth M. McAfee, Jenny S. J. McCahill, Casper M. Macaulay, Arthur D. Hendsbee and Gregory C. Welch 

Unusual Loss of Electron Mobility Upon Furan for Thiophene Substitution in a Molecular Semiconductor

Organic Electronics

Arthur D. Hendsbee, Jon-Paul Sun, Theresa M. McCormick, Ian G. Hill and Gregory C. Welch 

An Electron-Deficient Small Molecule Accessible From Sustainable Synthesis and Building Blocks for Use as a Fullerene Alternative in Organic Photovoltaics

ChemPhysChem - Special Issue on Organic Electronics - Cover Article 

Seth M. McAfee, Jessica M. Topple, Abby-Jo Payne, Jon-Paul Sun, Ian G. Hill and Gregory C. Welch

 

2014

Design and Computational Characterization of Non-Fullerene Acceptors for Use in Solution-Processable Solar Cells

Journal of Physical Chemistry A

Lesley R. Rutledge, Seth M. McAfee and Gregory C. Welch 

High Open Circuit Voltage Organic Solar Cells Based Upon Fullerene Free Bulk Heterojunction Active Layers

Canadian Journal of Chemistry

Ala'a F. Eftaiha, Jon-Paul Sun, Arthur D. Hendsbee, Casper M. Macaulay, Ian G. Hill and Gregory C. Welch 

Phthalimide-thiophene-based Conjugated Organic Small Molecules with High Electron Mobility

Journal of Materials Chemistry C

Jon-Paul Sun, Arthur D. Hendsbee, Ala'a F. Eftaiha, Casper M. Macaulay, Lesley R. Rutledge, Gregory C. Welch and Ian G. Hill 

Synthesis of an H-Aggregated Thiophene-Phthalimide Based Small Molecule via Microwave Assisted Direct Arylation Coupling Reactions

Dyes and Pigments

Arthur D. Hendsbee, Casper M. Macaulay and Gregory C. Welch

Electron Deficient Diketopyrrolopyrrole Dyes for Organic Electronics: Synthesis by Direct Arylation, Optoelectronic Characterization, and Charge Carrier Mobility

Journal of Materials Chemistry A

Arthur D. Hendsbee, Jon-Paul Sun, Lesley R. Rutledge, Ian G. Hill and Gregory C. Welch

Development of Small Molecule Donors for Solution-Processed Organic Solar Cells

Material Matters

Abby-Jo Payne and Gregory C. Welch

Recent Advances of Non-Fullerene, Small Molecular Acceptors for Solution Processed Bulk Heterojunction Solar Cells

Journal of Materials Chemistry A

Ala' F. Eftaiha, Jon-Paul Sun, Ian G. Hill and Gregory C. Welch

 

Past Publications by Gregory C. Welch

University of California Santa Barbara Publications

 

Perez, A. L.; Rogers, J. T.; Brady, M. A.; Sun, Y.; Welch, G. C.; Schmidt, K.; Toney, M. F.; Jinnai, H.; Heeger, A. J.; Chabinyc, M.; Bazan, G. C.; Kramer, E. J. (The Role of Solvent-Addtive Processing in High Performance Small Molecule Solar Cells). Chemistry of Materials. 2014, 26, 6531-6541. 10.1021/cm5031987. October.

 

Coughlin, J; Zhugayevych, A; Bakus, R; van der Poll, T; Welch, G. C.; Teat, S; Bazan, G; Tretiak, S (A Combined Experimental and Theoretical Study of Conformational Preferences of Molecular Semiconductors). Journal of Physical Chemistry C. 2014, 118, 15610-15623. 10.1021/jp506172a. June.

 

Coughlin, J.; Henzon, Z; Welch, G. C.; Bazan, G. C. (Design and Synthesis of Molecular Donors for Solution-Processed High-Efficiency Organic Solar Cells). Accounts of Chemicals Research, 2014, 47, 257-270. 10.1021/ar400136b. January.

 

Ratcliff, E. L.; Bakus II, R. C.; Welch, G. C.; van der Poll, T. V.; Garcia, A.; Cowan, S. R.; MacLeod, B. A.; Ginley, D. S.; Bazan, G. C.; Olson, D. C. (Formation of interfacial traps upon surface protonation in small molecule solution processed bulk heterojunctions probed by photoelectron spectroscopy). Journal of Materials Chemistry C, 2013, 1, 6223-6234. 10.1039/C3TC31064G. October.

 

Henson, Z.; Zalar, P.; Chen, X.; Welch, G. C.; Nguyen, T.; Bazan, G. C. (Towards Environmentally Friendly Processing in Molecular Semiconductors). Journal of Materials Chemistry A, 2013, 1, 11117-11120. 10.1039/C3TA12690K. October.

 

Eisenmenger, N.; Su, G.; Welch, G.C.; Takacs, C.J.; Bazan, G. C.; Kramer, E; Heeger, A. J.; Chabinyc, M. (Effect of bridging atom identity on the morphological behavior of solution-processed small molecule bulk heterojunction photovoltaics). Chemistry of Materials, 2013, 25, 1688-1698. 10.1021/cm4001416. May.

 

Zhugayevych, A.; Postupna, O.; Bakus II, R. C.;  Welch, G. C.; Bazan, G. C.; Tretiak, S. (Ab-initio Study of a Molecular Crystal for Photovoltaics: Light Absorption, Exciton and Charge Carrier Transport). J. Phys. Chem. C., 2013, 117, 4920-4930. 10.1021/jp310855p. March.

 

Walker, B.; Liu, J.; Kim, C.; Welch, G.; Park, J.; Lin, J.; Zalar, P.; Proctor, C.; Seo, J.; Bazan, G.; Nguyen, T. (Optimization of Energy Levels by Molecular Design: Evaluation of bis-Diketopyrrolopyrrole Molecular Donor Materials for Bulk Heterojunction Solar Cells). Energy Environ. Sci., 2013, 6, 952-962. 10.1039/C3EE24351F. March.

 

Welch, G. C.; Bakus II, R. C.; Teat, S.; Bazan, G. C. (Impact of Regiochemistry and Isoelectronic Bridgehead Substitution on the Molecular Shape and Bulk Organization of Narrow Band Gap Chromophores). J. Am. Chem. Soc., 2013, 135, 2298–2305. 10.1021/ja310694t. February.

 

Leong, W. L.; Welch, G. C.; Seifter, J.; Seo, J.; Bazan, G. C.; Heeger, A. J. (Understanding the role of thermal processing in high performance solution processed small molecule bulk heterojunction solar cells). Adv. Energy Mater. 2013, 3, 356-363. 10.1002/aenm.201200631. March.

 

Kaake, L. G.;  Jasieniak, J.J; Bakus II, R. C.; Welch, G. C.; Moses, D.; Bazan, G. C.; Heeger, A. J. (Photoinduced Charge Generation in a Molecular Bulk Heterojunction Material). J. Am. Chem. Soc., 2012, 134, 19828–19838. 10.1021/ja308949m. December.

 

Jasieniak, J. J.;  Hsu, B. B. Y.; Welch, G. C.; Bazan, G. C.; Moses, D.; Heeger, A. J. (Insights into π-Conjugated Small Molecule Neat Films and Blends As Determined Through Photoconductivity). ACS   Nano. 2012, 6, 8735–8745. 10.1021/nn303724m. October.

 

Takacs, C. J.; Sun, Y.; Welch, G. C.; Perez, L. A.; Liu, X.; Wen W.; Bazan, G. C.; Heeger, A. J. (Solar       cell efficiency, self-assembly and dipole-dipole interactions of isomorphic narrow bandgap molecules). J. Am. Chem. Soc. 2012, 134, 16597–16606. 10.1021/ja3050713. October.

 

Garcia, A.; Welch, G. C.; Ratcliff, E.; Ginley, D. S.; Bazan, G. C.; Olson, C. D. (Improvement of Interfacial Contacts for New Small-Molecule Bulk-Heterojunction Organic Photovoltaics). Adv. Mater. 2012, 24, 5368-5373. 10.1002/adma.201200963. October.

 

Huang, Y. C.; Welch, G. C.; Bazan, G. C.; Chabinyc, M.; Su, W. F. (Self-Vertical Phase Separation Study of Nanoparticle/Polymer Solar Cells by Introducing Fluorinated Small Molecules). Chem. Comm. 2012, 48, 7250-7252. 10.1039/C2CC32401F. July.

 

Zalar, P.; Henson, Z. H.; Welch, G. C.; Bazan, G. C.; Nguyen, T. Q. (Color Tuning in Polymer Light-Emitting Diodes with Lewis Acids). Angew. Chem. Int. Ed. 2012, 51, 7495-7498. 10.1002/anie.201202570. July.

 

Kaake, L.; Welch, G. C.; Moses, D.; Bazan, G. C.; Heeger, A. J. (Influence of Processing Additives on Ultrafast Charge Transfer Dynamics in a Small Molecule Bulk Heterojunction Film).  J. Phys. Chem. Lett. 2012, 3, 1253-1257. 10.1021/jz300365b. May.

 

Leong, W. L.; Welch, G. C.; Kaake, L.; Takacs, C. J.; Sun, Y.; Bazan G. C.; Heeger, A. J. (Role of Trace Impurities in the Photovoltaic Performance of Solution Processed Small    Molecule Bulk Heterojunction Solar Cells). Chem. Sci. 2012, 3, 2103-2110. 10.1039/C2SC20157G. June.

 

Henson, Z.; Welch, G.C.; van der Poll, T.; Bazan, G. C. (Pyridalthiadiazole-Based Narrow Band Gap Chromophores). J. Am. Chem. Soc. 2012, 134, 3766-3779. 10.1021/ja209331y. February.

 

Sun, Y.; Welch, G. C.; Leong, W. L.; Takacs, C. J.; Bazan G. C.; Heeger, A. J. (Solution-Processed Small-Molecule Solar Cells with 6.7% Efficiency). Nat. Mater. 2012, 11, 44-48. 10.1038/nmat3160. January.

 

*Highlighted in the MRS Bulletin, 2012, 37, 10.*

 

Ying, L.; Hsu, B. B. Y.; Zhan, H.; Welch, G. C.; Zalar, P.; Perez, L.; Nguyen, T. C.; Heeger, A. J.; Bazan, G. C. (Regioregular Pyridal[2,1,3]thiadiazole p-Conjugated Copolymers). J. Am. Chem. Soc. 2011, 133, 18538-18541. 10.1021/ja207543g. November.

 

Welch, G. C.; Perez, L.; Hoven, C. V.; Zhang, Y.; Dang, X. D.; Sharenko, A.; Toney, M. F.; Kramer, E.J.; Nguyen, T. Q.; Bazan, G.C. (A Modular Molecular Framework for Utility in Small-Molecule Solution-Processed Organic Photovoltaic Devices). J. Mat. Chem. 2011, 121, 12700-12709. 10.1039/C1JM11963J. September.

 

Caputo, B. J. A.; Welch, G. C.; Kamkar, D. A.; Henson, Z.; Bazan, G. C. (A Dithienosilole-Benzooxadiazole Copolymer for Utility in Organic Solar Cells). SMALL, 2011, 7, 1422-1426. 10.1002/smll.201100005. May.

 

Welch, G. C.; Bazan, G. C. (Lewis Acid Adducts of Narrow Band Gap Conjugated Polymers). J. Am. Chem. Soc. 2011, 131 (12), 4632-4644. 10.1021/ja110968m. March.             

 

Welch, G. C.; Coffin, R.; Peet, J.; Bazan, G. C. (Band Gap Control in Conjugated Oligomers via   Lewis Acids). J. Am. Chem. Soc. 2009, 131 (31), 10802–10803. 10.1021/ja902789w. August.

University of Windsor Publications

 

Granville, S.; Welch, G. C.; Stephan, D. W. (Ni, Pd, Pt and Ru Complexes of Phosphine-Borate   Ligands). Inorg. Chem. 2012, 51, 4711-4721. 10.1021/ic2026895. April.

 

Stephan, D; Greenberg, S; Graham, T; Chase, P; Hastie, J; Geier, S; Farrell, J; Brown, C; Heiden, Z; Welch, G. C.; Ullrich, M. (Metal-Free Catalytic Hydrogenation of Polar Substrates by Frustrated Lewis Pairs). Inorg. Chem. 2011, 50, 12338-12348. 10.1021/ic200663v. December.

 

Dureen, M. A.; Welch, G. C.; Gilbert, T. M.; Stephan, D. W. (Heterolytic Cleavage of Disulfides by Frustrated Lewis Pairs). Inorg. Chem. 2009, 48, 9910-9917. 10.1021/ic901590s. October.

 

McCahill, J. S. J.; Welch, G. C.; Stephan, D. W. (Sterically Hindered Phosphine and Phosphonium-based Activators and Additives for Olefin Polymerization). Dalton Trans. 2009, 40, 8555-8561. 10.1039/B911489K. October.

 

Alhomaidan, O.; Welch, G. C.; Bai, G.; Stephan D. W. (Hafnium-phosphinimide complexes). Can. J. Chem. 2009, 87, 1163-1172. 10.1139/V09-082. August.

 

Welch, G. C.; Prieto, R.; Dureen, M. A.; Lough, A. J; Labeodan, S.; Höltrichter-Rössmann, T.; Stephan, D. W. (Reactions of Phosphines with Electron Deficient Boranes). Dalton Trans. 2009, 40, 1559-1570. 10.1039/B814486A. March.

 

Welch, G. C.; Holtrichter-Roessmann, T.; Stephan, D. W. (Thermal Rearrangement of Phosphine-B(C6F5)3 Adducts). Inorg. Chem. 2008, 47, 1904-1906. 10.1021/ic702485r. March.

 

Chase, P. A.; Welch, G. C.; Jurca, T.; Stephan, D. W. (Metal-Free Catalytic Hydrogenation) Angew. Chem. Int. Edn. Engl. 2007, 46, 8050-8053. 10.1002/anie.200702908. October. *Cover Article, VIP Article, Featured in C&EN New 85(37) Page 33, September 2007*.

 

Welch, G. C.; Cabrera, L.; Chase, P. A.; Hollink, E.; Masuda, J. D.; Wei, P.; Stephan, D. W. (Tuning Lewis Acidity Using the Reactivity of “Frustrated Lewis Pairs”: Facile Formation of Phosphine-boranes and Cationic Phosphonium-boranes). Dalton Trans. 2007, 31, 3407-3414. 10.1039/B704417H.

 

*Cover Article*.

 

McCahill, J. S. J.; Welch, G. C.; Stephan, D. W. (Reactivity of “Frustrated Lewis Pairs”: Three Component Reactions of Phosphines, a Borane, and Olefins). Angew. Chem. Int. Edn. Engl. 2007, 46, 4968-4971. 10.1002/anie.200701215. *VIP Article*.

 

Welch, G. C.; Stephan, D. W. (Facile Heterolytic Cleavage of Dihydrogen by Phosphines and Boranes). J. Am. Chem. Soc. 2007, 129, 1880-1881. 10.1021/ja067961j.

 

Welch, G. C.; San Juan, R.; Masuda, J. D.; Stephan, D. W. (Reversible, Metal Free Hydrogen Activation). Science 2006, 314, 1124-1126. 10.1126/science.1134230.

 

*Highlighted “Breaking the H2 Marriage and Reuniting the Couple” Gregory Kubas, Science 2006, 314, 1096-1097. Featured in C&EN News, 84(47) Page 21, November 2006*

 

Carbrera, L.; Welch, G. C.; Wei, P.; Masuda, J. D.; Stephan, D. W. (Pyridine and Phosphine Reactions with [CPh3][B(C6F5)4]). Inorg. Chim. Acta. 2006, 359, 3066-3071. 10.1016/j.ica.2006.02.006.

 

 *Invited for the special 'Professor Brian James' issue*.

 

Welch, G. C.; Masuda, J. D.; Stephan, D. W. (Phosphonium-Borate Zwitterions, Anionic Phosphines, and Dianionic Phosphonium-Dialkoxides via Tetrahydrofuran Ring-Opening Reactions). Inorg. Chem. 2006, 45, 478-480. 10.1021/ic051713r.

University of Calgary Publications

 

Welch, G. C.; Piers, W. E.; Parvez, M.; McDonald, R. (Neutral and Cationic Organoaluminum Complexes Utilizing a Novel Anilido Phosphinimine Ligand). Organometallics, 2004, 23, 1811-1818. 10.1021/om034302w.

 

Hayes, P. H.; Welch, G. C.; Emslie, D.; Noack, C.; Piers, W. E., Parvez, M. (A New Chelating Anildio-Imine Donor Related to ß-Diketiminato Ligands for Stabilization of Organoyttrium Cation). Organometallics, 2003, 22, 1577-1579. 10.1021/om030157a.

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