期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 11, 期 1, 页码 129-135出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.9b02719
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资金
- Flemish Research Foundation (FWO Vlaanderen) [G0D0118N, G0B2718N]
- German Federal Ministry for Education and Research (BMBF) [03IPT602X]
Efficient exciton dissociation and subsequent generation of free charge carriers at the organic donor-acceptor interface requires a number of electron-transfer processes. It is a common view that these steps result in an unavoidable energy loss in organic photovoltaic devices that is not present in other types of solar cells. The currently best performing organic solar cells with power conversion efficiencies over 16% challenge this view, and no interfacial charge-transfer states with energy significantly lower than the strongly absorbing singlet states are detected within the gap of the used donor and acceptor materials. This Perspective will discuss implications, the remaining sources of energy loss, and open questions to be solved to achieve power conversion efficiencies over 20%.
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