Molecular Doping Strategies in Organic Photovoltaics
Summary
The integration of molecular dopants into organic photovoltaic devices has emerged as a transformative approach for enhancing performance, stability and manufacturability. By introducing electron-donating or electron-withdrawing species into the active layer, researchers can finely tune energy-level alignments, increase charge-carrier densities and rebalance electron–hole mobilities. These modifications improve exciton dissociation, strengthen internal electric fields and reduce recombination losses, leading to measurable gains in power conversion efficiency (PCE). Moreover, molecular doping offers a versatile route to tailor the morphology and microstructure of bulk heterojunctions, address interfacial barriers and extend device lifetimes. Collectively, these advances underscore the critical role of precise doping control in the development of next-generation, scalable organic solar technologies.
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Molecular Doping Strategies in Organic Photovoltaics publication trend
The graph below shows the total number of articles in molecular doping strategies in organic photovoltaics across all publications each year (not limited to Nature Index journals).
Technical terms
Molecular doping: Intentional addition of small amounts of dopant molecules to an organic semiconductor to adjust its electrical properties.
p-type dopant: A species that accepts electrons from the host material, generating positive charge carriers (holes).
n-type dopant: A species that donates electrons to the host material, increasing negative charge carriers.
Bulk heterojunction: An interpenetrating network of donor and acceptor materials in which excitons separate and free carriers transport to electrodes.
Power conversion efficiency (PCE): The percentage of incident light energy converted into electrical power by a photovoltaic device.
Charge carrier mobility: A measure of how quickly electrons or holes move through a semiconductor under an electric field.
Exciton dissociation: The process by which a bound electron–hole pair separates into free charge carriers at a donor–acceptor interface.
References
- Eliminating the Imbalanced Mobility Bottlenecks via Reshaping Internal Potential Distribution in Organic Photovoltaics. Advanced Science (2023).
- 17.1% Efficient Single‐Junction Organic Solar Cells Enabled by n‐Type Doping of the Bulk‐Heterojunction. Advanced Science (2020).
- A Novel Doping Layer Strategy to Realize High Efficiency Laye-by-Layer Organic Solar Cells. E3S Web of Conferences (2023).
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