Polymer Design and Optimization for Organic Photovoltaics
Summary
Organic photovoltaics (OPVs) employ conjugated polymers as the active light-harvesting and charge-transport media in flexible, lightweight solar cells. Central to performance is the molecular architecture of donor–acceptor copolymers, where judicious selection of electron-rich and electron-deficient units dictates optical absorption, energy-level alignment and charge-carrier mobility. Backbone planarity and side-chain engineering govern intermolecular packing, film morphology and thus exciton dissociation and charge extraction. Recent advances have combined computational screening with synthetic innovation to reduce complexity, enhance stability and elevate power conversion efficiencies (PCEs) beyond 15 per cent. Materials such as conjugated mesopolymers and non-fused-ring electron donors illustrate strategies to balance solubility, manufacturability and device reproducibility. Emerging classes of heteroaromatic cores—benzodifuran, benzotriazole and furan-derived motifs—offer tunable band-gaps, dielectric constants and surface energetics tailored for non-fullerene acceptor blends. These developments underscore the global significance of OPV research, promising scalable, low-cost solar energy solutions with applications from building-integrated photovoltaics to portable power.
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Polymer Design and Optimization for Organic Photovoltaics publication trend
The graph below shows the total number of articles in polymer design and optimization for organic photovoltaics across all publications each year (not limited to Nature Index journals).
Technical terms
Bulk heterojunction: A nanoscale interpenetrating network of donor and acceptor materials for efficient exciton dissociation and charge separation.
Conjugated polymer: A macromolecule with alternating single and double bonds along its backbone, enabling delocalised π-electrons and semiconducting behaviour.
Donor–acceptor copolymer: A polymer comprising alternating electron-rich (donor) and electron-deficient (acceptor) units to tune optical and electronic properties.
Non-fullerene acceptor (NFA): A small-molecule or polymer acceptor material that replaces fullerene derivatives to improve absorption, energy alignment and morphological stability.
Power conversion efficiency (PCE): The ratio of electrical power output to incident solar power input, expressed as a percentage.
References
- Efficient Organic Solar Cells Enabled by Simple Non‐Fused Electron Donors with Low Synthetic Complexity. Small (2021).
- Conjugated Mesopolymer Achieving 15% Efficiency Single‐Junction Organic Solar Cells. Advanced Science (2022).
- Recent Progress of Benzodifuran‐Based Polymer Donors for High‐Performance Organic Photovoltaics. Small Science (2022).
- The Double-Cross of Benzotriazole-Based Polymers as Donors and Acceptors in Non-Fullerene Organic Solar Cells. Molecules (2024).
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