Solution-processable singlet fission photovoltaic devices

Yang, L., Tabachnyk, M., Bayliss, S. L. , Böhm, M. L., Broch, K., Greenham, N. C., Friend, R. H. and Ehrler, B. (2015) Solution-processable singlet fission photovoltaic devices. Nano Letters, 15(1), pp. 354-358. (doi: 10.1021/nl503650a) (PMID:25517654)

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We demonstrate the successful incorporation of a solution-processable singlet fission material, 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene), into photovoltaic devices. TIPS-pentacene rapidly converts high-energy singlet excitons into pairs of triplet excitons via singlet fission, potentially doubling the photocurrent from high-energy photons. Low-energy photons are captured by small-bandgap electron-accepting lead chalcogenide nanocrystals. This is the first solution-processable singlet fission system that performs with substantial efficiency with maximum power conversion efficiencies exceeding 4.8%, and external quantum efficiencies of up to 60% in the TIPS-pentacene absorption range. With PbSe nanocrystal of suitable bandgap, its internal quantum efficiency reaches 170 ± 30%.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Bayliss, Dr Sam
Authors: Yang, L., Tabachnyk, M., Bayliss, S. L., Böhm, M. L., Broch, K., Greenham, N. C., Friend, R. H., and Ehrler, B.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Nano Letters
Publisher:American Chemical Society
ISSN (Online):1530-6992
Published Online:22 December 2014

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