Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 15, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4824420
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Funding
- EPSRC
- Cambridge Gates Trust
- KACST
- Selwyn College Cambridge
- Engineering and Physical Sciences Research Council [1208395] Funding Source: researchfish
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Singlet fission sensitized photovoltaics have the potential to surpass the Shockley-Queisser limit for a single-junction structure. We investigate the dynamics of triplet excitons resulting from singlet fission in pentacene and their ionization at a C-60 heterojunction. We model the generation and diffusion of excitons to predict the spectral response. We find the triplet diffusion length in polycrystalline pentacene to be 40 nm. Poly(3-hexylthiophene) between the electrode and pentacene works both to confine triplet excitons and also to transfer photogenerated singlet excitons into pentacene with 30% efficiency. The lower bound for the singlet fission quantum efficiency in pentacene is 180 +/- 15%. (C) 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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