Advanced Concepts in Photovoltaics

0486571 - ÚOCHB 2018 RIV GB eng M - Monography Chapter
Johnson, J. C. - Michl, Josef
Singlet Fission and 1,3-Diphenylisobenzofuran as a Model Chromophore.
Advanced Concepts in Photovoltaics. Cambridge: Royal Society of Chemistry, 2014 - (Nozik, A.; Conibeer, G.; Beard, M.), s. 324-344. RSC Energy and Environment Series, 11. ISBN 978-1-84973-591-9
Institutional support: RVO:61388963
Keywords : exciton fission * anthracene crystals * solar cells
OECD category: Physical chemistry

A brief description is provided of a phenomemon known as singlet fission (SF), in which a singlet excited chromophore and a ground state chromophore share energy to produce two triplet excited chromophores. In principle, the process permits the absorption of a single photon to produce two electrons and two holes, leading to a theoretical solar cell efficiency close to 1/2, significantly above the 1/3 Shockley–Queisser limit. The prerequisites for efficient singlet fission are considered, both in terms of the properties of individual chromophores and in terms of their mutual coupling. The design rules for efficient chromophores derived from first principles led to the formulation of a model system, 1,3-diphenylisobenzofuran. This chromophore is used to illustrate the singlet fission process and the complications that can arise.
Permanent Link: http://hdl.handle.net/11104/0281799