A5110992739- Organic Electronics and Photovoltaics
- Conducting polymers and applications
- Perovskite Materials and Applications
- Molecular Junctions and Nanostructures
- solar cell performance optimization
- Advanced Photocatalysis Techniques
- Chalcogenide Semiconductor Thin Films
- Chemistry and Chemical Engineering
- Phase-change materials and chalcogenides
- Photoreceptor and optogenetics research
- Spectroscopy and Quantum Chemical Studies
- Fuel Cells and Related Materials
- Organic Light-Emitting Diodes Research
- High Entropy Alloys Studies
- TiO2 Photocatalysis and Solar Cells
Imperial College London
2022-2025
Stanford University
2022
King Abdullah University of Science and Technology
2022
The Francis Crick Institute
2022
London Biofoundry
2022
University of Oxford
2022
With the advent of nonfullerene acceptors (NFAs), organic photovoltaic (OPV) devices are now achieving high enough power conversion efficiencies (PCEs) for commercialization. However, these performances rely on active layers processed from petroleum-based and toxic solvents, which undesirable mass manufacturing. Here, we demonstrate use biorenewable 2-methyltetrahydrofuran (2MeTHF) cyclopentyl methyl ether (CPME) solvents to process donor: NFA-based OPVs with no additional additives in...
We investigate the charge-generation processes limiting performance of low-offset organic bulk-heterojunction solar cells by studying a series newly synthesized PBDB-T-derivative donor polymers whose ionisation energy (IE) is tuned via functional group (difluorination or cyanation) and backbone (thiophene selenophene bridge) modifications. When blended with acceptor Y6, present heterojunction donor-acceptor IE offsets (ΔEIE) ranging from 0.22 to 0.59 eV. As expected, small ΔEIE decrease...
Exchanging hydrophobic alkyl-based side chains to hydrophilic glycol-based is a widely adopted method for improving mixed-transport device performance, despite the impact on solid-state packing and polymer-electrolyte interactions being poorly understood. Presented here molecular dynamics (MD) force field modeling alkoxylated glycolated polythiophenes. The validated against known motifs their monomer crystals. MD simulations, coupled with X-ray diffraction (XRD), show that polythiophenes...
Nonfullerene acceptors have caused a step change in organic optoelectronics research but little is known about the mechanism and factors limiting charge transport these molecular materials. Here joint computational-experimental investigation presented to understand impact of various sources disorder on electron nonfullerene acceptor O-IDTBR. We find that single crystals this material, occurs transient quantum delocalization regime with excess delocalized over three molecules average,...
Abstract The power conversion efficiency of organic photovoltaics (OPV) has recently surpassed 20%. However, the degradation mechanisms affecting blends based on these materials require urgent attention to improve stability such devices towards long timescales necessary for commercialization. In this work, we evaluated OPVs sustainable and scalable donors poly[(thiophene)‐alt‐(6,7‐difluoro‐2‐(2‐hexyldecyloxy)quinoxaline)] (PTQ10)...
Abstract Charge manipulation is crucial in optoelectronic devices. The unoptimized interfacial charge injection/extraction solution‐processed bulk‐heterojunction (BHJ) organic photodetectors (OPDs) presents significant challenges achieving high detectivity and fast response speed. Here, we first develop an approach for intrinsic induced by molecularly engineered donors to block electron injection facilitate hole extraction between the indium tin oxide (ITO) transparent anode photoactive...
Exploring charge pair generation in single-component organic photovoltaic devicesJenny Nelson aa Department of Physics and Centre for Processable Electronics, Imperial College London, London SW7 2AZ, UKInternational Conference on Hybrid Organic PhotovoltaicsProceedings International Photovoltaics (HOPV24)València, Spain, 2024 May 12th - 15thOrganizer: Bruno EhrlerInvited Speaker, Jenny Nelson, presentation 174DOI: https://doi.org/10.29363/nanoge.hopv.2024.174Publication date: 6th February...