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The Cost of Converting Excitons into Free Charge Carriers in Organic Solar Cells
Journal Contribution - Journal Article
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%.
Journal: Journal of Physical Chemistry Letters
ISSN: 1948-7185
Issue: 1
Volume: 11
Pages: 129 - 135
Publication year:2020
BOF-keylabel:yes
IOF-keylabel:yes
BOF-publication weight:6
CSS-citation score:3
Authors:International
Authors from:Higher Education
Accessibility:Closed