SELF-ORGANISED MATERIALS FOR FLEXIBLE ELECTRONICS

Highly Fluorescent Pyridinium Betaines for Light Harvesting

Jingjing Xu, Bolong Zhang, Marina Jansen, Lars Goerigk, Wallace WH Wong, Chris Ritchie

2017-10-23

We report the findings of our experimental and theoretical investigations into the properties of pyridinium enolates and their pot..

Hoch fluoreszierende Pyridiniumbetaine für die Lichtsammlung

Jingjing Xu, Bolong Zhang, Marina Jansen, Lars Goerigk, Wallace WH Wong, Chris Ritchie

2017-10-23

Determinants of the efficiency of photon upconversion by triplet-triplet annihilation in the solid state: zinc porphyrin derivatives in PVA

Ranjana Rautela, Neeraj K Joshi, Sacha Novakovic, Wallace WH Wong, Jonathan M White, Kenneth P Ghiggino, Matthew F Paige, Ronald P Steer

2017-09-14

Spectroscopic, photophysical and computational studies designed to expose and explain the differences in the efficiencies of non-c..

AIE conjugated polyelectrolytes based on tetraphenylethene for efficient fluorescence imaging and lifetime imaging of living cells

Mengxia Gao, Yuning Hong, Bin Chen, Yinan Wang, Wenjun Zhou, Wallace WH Wong, Jian Zhou, Trevor A Smith, Zujin Zhao

2017-07-14

A series of new conjugated polyelectrolytes (CPEs) containing tetraphenylethene units are synthesized and characterized. They show..

A Green Route to Conjugated Polyelectrolyte Interlayers for High-Performance Solar Cells

Jegadesan Subbiah, Valerie D Mitchell, Nicholas KC Hui, David J Jones, Wallace WH Wong

2017-07-10

Synthesis of fluorene‐based conjugated polyelectrolytes was achieved via Suzuki polycondensation in water and completely open to a..

A Green Route to Conjugated Polyelectrolyte Interlayers for High‐Performance Solar Cells

Jegadesan Subbiah, Valerie D Mitchell, Nicholas KC Hui, David J Jones, Wallace WH Wong

2017-07-10

Emissive Molecular Aggregates and Energy Migration in Luminescent Solar Concentrators

James L Banal, Bolong Zhang, David J Jones, Kenneth P Ghiggino, Wallace WH Wong

2017-01-17

Luminescent solar concentrators (LSCs) are light harvesting devices that are ideally suited to light collection in the urban envir..

Continuous Flow Synthesis of Conjugated Polymers and Carbon Materials

Valerie D Mitchell, Wallace WH Wong

2017-01-01

Well structured, this book summarizes recent achievements, outlines the current state and reviews research trends.

The synthesis and purification of amphiphilic conjugated donor-acceptor block copolymers

Valerie D Mitchell, Wallace WH Wong, Mukundan Thelakkat, David J Jones

2017-01-01

Nanoscale domains of donor and acceptor materials are crucial for charge generation in organic photovoltaic devices. These domains..

High performance p-type molecular electron donors for OPV applications via alkylthiophene catenation chromophore extension

Paul B Geraghty, Calvin Lee, Jegadesan Subbiah, Wallace WH Wong, James L Banal, Mohammed A Jameel, Trevor A Smith, David J Jones

2016-11-02

The synthesis of key 4-alkyl-substituted 5-(trimethylsilyl)thiophene-2-boronic acid pinacol esters 3 allowed a simplified alkylthi..

Morphology Changes in Bulk Donor-Acceptor Poly(Benzodithiophene-Benzotriazole) after Post-Treatment

Wojciech Zajaczkowski, Tomasz Marszalek, Wallace WH Wong, Wojciech Pisula

2016-11-01

The bulk order in donor–acceptor poly(benzodithiophene-benzotriazole) was improved by two different post-treatment procedures appl..

Energy Migration in Organic Solar Concentrators with a Molecularly Insulated Perylene Diimide

James L Banal, Hamid Soleimaninejad, Fadi M Jradi, Maoyuan Liu, Jonathan M White, Andrew W Blakers, Matthew W Cooper, David J Jones, Kenneth P Ghiggino, Seth R Marder, Trevor A Smith, Wallace WH Wong

2016-06-23

Maintaining high incident light absorption while minimizing luminescence reabsorption is a key challenge for organic luminescent s..

Development of a High-Performance Donor Acceptor Conjugated Polymer: Synergy in Materials and Device Optimization

Mei Gao, Jegadesan Subbiah, Paul B Geraghty, Ming Chen, Balaji Purushothaman, Xiwen Chen, Tianshi Qin, Doojin Vak, Fiona H Scholes, Scott E Watkins, Melissa Skidmore, Gerard J Wilson, Andrew B Holmes, David J Jones, Wallace WH Wong

2016-05-24

The development of a high-performance polymer PBDT-BT for bulk heterojunction solar cell devices is summarized. The polymer was fi..

Separation and identification of indene-C-70 bisadduct isomers

Bolong Zhang, Jegadesan Subbiah, David J Jones, Wallace WH Wong

2016-05-06

Following an initial work on the isolation of a single geometric isomer from an indene-C70 bisadduct (IC70BA) mixture, we report t..

Controlled Synthesis of Well-Defined Semiconducting Brush Polymers

Dean van As, Jegadesan Subbiah, David J Jones, Wallace WH Wong

2016-02-01

Well-defined semiconducting bottlebrush polymers are prepared using controlled polymerization methods. The electron donor semicond..

Fullerene peapod nanoparticles as an organic semiconductor-electrode interface layer

Jing M Ren, Jegadesan Subbiah, Bolong Zhang, Kenji Ishitake, Kotaro Satoh, Masami Kamigaito, Greg G Qiao, Edgar HH Wong, Wallace WH Wong

2016-01-01

A syndiotactic poly(methyl methacrylate) bottlebrush polymer has been shown to complex with C60 fullerene and assemble into nanopa..

Organic Photovoltaic MaterialsDesign, Synthesis and Scale-Up

Wallace WH Wong, James L Banal, Paul B Geraghty, Quentin Hong, Bolong Zhang, Andrew B Holmes, David J Jones

2015-12-01

This account describes the work of our group in the area of organic photovoltaics in the past six years. The emphasis is on our ex..

A Transparent Planar Concentrator Using Aggregates of gem-Pyrene Ethenes

James L Banal, Jonathan M White, Tin Wai Lam, Andrew W Blakers, Kenneth P Ghiggino, Wallace WH Wong

2015-10-07

The luminescence properties of pyrene ethenes, both as monomer and aggregate species, are found to depend on the regioisomer struc..

Electroactive and Photoactive Poly[lsoindigo-alt-EDOT] Synthesized Using Direct (Hetero)Arylation Polymerization in Batch and in Continuous Flow

Francois Grenier, Badrou Reda Aich, Yu-Ying Lai, Maxime Guerette, Andrew B Holmes, Ye Tao, Wallace WH Wong, Mario Leclerc

2015-03-24

In this work, a combined approach was used to obtain a low-cost material for organic electronics by focusing on inexpensive monome..

Organic Solar Cells Using a High-Molecular-Weight Benzodithiophene-Benzothiadiazole Copolymer with an Efficiency of 9.4%

Jegadesan Subbiah, Balaji Purushothaman, Ming Chen, Tianshi Qin, Mei Gao, Doojin Vak, Fiona H Scholes, Xiwen Chen, Scott E Watkins, Gerard J Wilson, Andrew B Holmes, Wallace WH Wong, David J Jones

2015-01-27

A high molecular weight donor-acceptor conjugated polymer is synthesized using the Suzuki polycondensation method. Using this poly..

Optically monitored spray coating system for the controlled deposition of the photoactive layer in organic solar cells

Doojin Vak, Joel van Embden, Wallace WH Wong, Scott Watkins

2015-01-19

A spray deposition process equipped with an in situ optical thickness monitoring system has been developed to fabricate the photoa..

A molecular nematic liquid crystalline material for high-performance organic photovoltaics

Kuan Sun, Zeyun Xiao, Shirong Lu, Wojciech Zajaczkowski, Wojciech Pisula, Eric Hanssen, Jonathan M White, Rachel M Williamson, Jegadesan Subbiah, Jianyong Ouyang, Andrew B Holmes, Wallace WH Wong, David J Jones

2015-01-01

Solution-processed organic photovoltaic cells (OPVs) hold great promise to enable roll-to-roll printing of environmentally friendl..

Effect of molecular weight on the properties and organic solar cell device performance of a donor-acceptor conjugated polymer

Zeyun Xiao, Kuan Sun, Jegadesan Subbiah, Tianshi Qin, Shirong Lu, Balaji Purushothaman, David J Jones, Andrew B Holmes, Wallace WH Wong

2015-01-01

Donor-acceptor conjugated polymers with 2-(2-ethylhexyl)-3-hexyl thienyl substituted benzo[1,2-b:4,5-b′]dithiophene (BDT) as donor..

Enabling high-mobility, ambipolar charge-transport in a DPP-benzotriazole copolymer by side-chain engineering

Mathias Gruber, Seok-Heon Jung, Sam Schott, Deepak Venkateshvaran, Auke Jisk Kronemeijer, Jens Wenzel Andreasen, Christopher R McNeill, Wallace WH Wong, Munazza Shahid, Martin Heeney, Jin-Kyun Lee, Henning Sirringhaus

2015-01-01

In this article we discuss the synthesis of four new low band-gap co-polymers based on the diketopyrrolopyrrole (DPP) and benzotri..

One-pot selective synthesis of a fullerene bisadduct for organic solar cell applications

Bolong Zhang, Jegadesan Subbiah, Yu-Ying Lai, Jonathan M White, David J Jones, Wallace WH Wong

2015-01-01

A single isomer of fullerene bisadduct, PC61PF, was obtained from commercially available fullerene derivative, PC61BM, in one pot ..

Regioselective synthesis of fullerene multiadducts via tether-directed 1,3-dipolar cycloaddition

Bolong Zhang, Jonathan M White, David J Jones, Wallace WH Wong

2015-01-01

The regioselective synthesis of fullerene multiadducts was achieved from commercially available reagents in one pot over two steps..

Hydrogen bonding in bulk heterojunction solar cells: A case study

Zeyun Xiao, Kuan Sun, Jegadesan Subbiah, Shaomin Ji, David J Jones, Wallace WH Wong

2014-07-16

Small molecules with dithieno[3,2-b;2',3'-d]thiophene as central building block and octyl cyanoacetate and octyl cyanoacetamide as..

Concentrating Aggregation-Induced Fluorescence in Planar Waveguides: A Proof-of-Principle

James L Banal, Jonathan M White, Kenneth P Ghiggino, Wallace WH Wong

2014-04-10

The photophysical properties of fluorescent dyes are key determinants in the performance of luminescent solar concentrators (LSCs)..

Single Isomer of Indene-C-70 Bisadduct-Isolation and Performance in Bulk Heterojunction Solar Cells

Wallace WH Wong, Jegadesan Subbiah, Jonathan M White, Helga Seyler, Bolong Zhang, David J Jones, Andrew B Holmes

2014-02-25

Indene-C70 bisadduct (IC70BA) is a high performance electron acceptor material consisting of a mixture of regioisomers. A single i..

Efficient light harvesting of a luminescent solar concentrator using excitation energy transfer from an aggregation-induced emitter

James L Banal, Kenneth P Ghiggino, Wallace WH Wong

2014-01-01

The compromise between light absorption and reabsorption losses limits the potential light conversion efficiency of luminescent so..

Synthesis and photovoltaic properties of thieno[3,2-b]thiophenyl substituted benzo[1,2-b:4,5-b ']dithiophene copolymers

Z Xiao, J Subbiah, K Sun, DJ Jones, AB Holmes, WWH Wong

2014-01-01

A new benzo[1,2-b:4,5-b']dithiophene (BDT) building block with 4,8-disubstitution using 2-(2-ethylhexyl)-3-hexylthieno[3,2-b]thiop..

The role of solvent vapor annealing in highly efficient air-processed small molecule solar cells

Kuan Sun, Zeyun Xiao, Eric Hanssen, Michael FG Klein, Henk H Dam, Marina Pfaff, Dagmar Gerthsen, Wallace WH Wong, David J Jones

2014-01-01

We demonstrate highly-efficient, solution-processed small molecule solar cells with the best power conversion efficiency (PCE) of ..