Quantitative Singlet Fission in Solution-Processable Dithienohexatrienes

Kealan J. Fallon; Nipun Sawhney; Daniel T. W. Toolan; Ashish Sharma; Weixuan Zeng; Stephanie Montanaro; Anastasia Leventis; Simon Dowland; Oliver Millington; Daniel Congrave; Andrew Bond; Richard Friend; Akshay Rao; Hugo Bronstein

doi:10.1021/jacs.2c10254

Quantitative Singlet Fission in Solution-Processable Dithienohexatrienes

Kealan J. Fallon, Nipun Sawhney, Daniel T. W. Toolan, Ashish Sharma, Weixuan Zeng, Stephanie Montanaro, Anastasia Leventis, Simon Dowland, Oliver Millington, Daniel Congrave, Andrew Bond, Richard Friend, Akshay Rao, Hugo Bronstein

Materials Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Pages (from-to)	23516 - 23521
Journal	Journal of the American Chemical Society
Volume	144
Issue number	51
DOIs	https://doi.org/10.1021/jacs.2c10254
Publication status	Published - 28 Dec 2022

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10.1021/jacs.2c10254Licence: CC BY

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Fallon, K. J., Sawhney, N., Toolan, D. T. W., Sharma, A., Zeng, W., Montanaro, S., Leventis, A., Dowland, S., Millington, O., Congrave, D., Bond, A., Friend, R., Rao, A., & Bronstein, H. (2022). Quantitative Singlet Fission in Solution-Processable Dithienohexatrienes. Journal of the American Chemical Society, 144(51), 23516 - 23521. https://doi.org/10.1021/jacs.2c10254

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title = "Quantitative Singlet Fission in Solution-Processable Dithienohexatrienes",

abstract = "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.",

author = "Fallon, {Kealan J.} and Nipun Sawhney and Toolan, {Daniel T. W.} and Ashish Sharma and Weixuan Zeng and Stephanie Montanaro and Anastasia Leventis and Simon Dowland and Oliver Millington and Daniel Congrave and Andrew Bond and Richard Friend and Akshay Rao and Hugo Bronstein",

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doi = "10.1021/jacs.2c10254",

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T1 - Quantitative Singlet Fission in Solution-Processable Dithienohexatrienes

AU - Fallon, Kealan J.

AU - Sawhney, Nipun

AU - Toolan, Daniel T. W.

AU - Sharma, Ashish

AU - Zeng, Weixuan

AU - Montanaro, Stephanie

AU - Leventis, Anastasia

AU - Dowland, Simon

AU - Millington, Oliver

AU - Congrave, Daniel

AU - Bond, Andrew

AU - Friend, Richard

AU - Rao, Akshay

AU - Bronstein, Hugo

PY - 2022/12/28

Y1 - 2022/12/28

N2 - 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.

AB - 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.

U2 - 10.1021/jacs.2c10254

DO - 10.1021/jacs.2c10254

M3 - Article

SN - 0002-7863

VL - 144

SP - 23516

EP - 23521

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 51

ER -

Quantitative Singlet Fission in Solution-Processable Dithienohexatrienes

Abstract

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