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Quantitative Singlet Fission in Solution-Processable Dithienohexatrienes
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DOI：10.1021/jacs.2c10254.png)
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摘要
En 中文
Singlet fission (SF) is a promising strategy to overcome thermalization losses and enhance the efficiency of single junction photovoltaics (PVs). The development of this field has been strongly material-limited, with a paucity of materials able to undergo SF. Rarer still are examples that can produce excitons of sufficient energy to be coupled to silicon PVs (>1.1 eV). Herein, we examine a series of a short-chain polyene, dithienohexatriene (DTH), with tailored material properties and triplet (T1) energy levels greater than 1.1 eV. We find that these highly soluble materials can be easily spin-cast to create thin films of high crystallinity that exhibit ultrafast singlet fission with near perfect triplet yields of up to 192%. We believe that these materials are the first solution-processable singlet fission materials with quantitative triplet formation and energy levels appropriate for use in conjunction with silicon PVs.
Keyword:
EXCITON FISSION
THIN-FILMS
EFFICIENCY
SILICON
STATE
LIMIT
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期刊
IF:
15.6
论文数:
20.0W
被引数:
60.2W
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引用论文
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