Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 51, Issue 9, Pages 2020-2067Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201102326
Keywords
bulk heterojunctions; organic semiconductors; organic solar cells; photovoltaics; planar heterojunctions
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Funding
- German Federal Ministry of Education and Research (BMBF)
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This article is written from an organic chemists point of view and provides an up-to-date review about organic solar cells based on small molecules or oligomers as absorbers and in detail deals with devices that incorporate planar-heterojunctions (PHJ) and bulk heterojunctions (BHJ) between a donor (p-type semiconductor) and an acceptor (n-type semiconductor) material. The article pays particular attention to the design and development of molecular materials and their performance in corresponding devices. In recent years, a substantial amount of both, academic and industrial research, has been directed towards organic solar cells, in an effort to develop new materials and to improve their tunability, processability, power conversion efficiency, and stability. On the eve of commercialization of organic solar cells, this review provides an overview over efficiencies attained with small molecules/oligomers in OSCs and reflects materials and device concepts developed over the last decade. Approaches to enhancing the efficiency of organic solar cells are analyzed.
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