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Nano Research 2018, 11(1): 185-194 https://doi.org/10.1007/s12274-017-1618-z
Research Article | Issue | Published: 01 July 2017

Highly π-extended copolymer as additive-free hole-transport material for perovskite solar cells

Show Author's Information Jie Liu1,2,  Qianqing Ge1,2,  Weifeng Zhang1,2,  Jingyuan Ma1,2,  Jie Ding1,2,  Gui Yu1,2( ),  Jinsong Hu1,2( )
Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Nanostructure and NanotechnologyCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China
University of Chinese Academy of SciencesBeijing100049China
Keywords:
stability, perovskite solar cell, hole-transport layer, dopant-free, PDVT-10
Cite this article:
Liu J, Ge Q, Zhang W, et al. Highly π-extended copolymer as additive-free hole-transport material for perovskite solar cells. Nano Research, 2018, 11(1): 185-194. https://doi.org/10.1007/s12274-017-1618-z
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Abstract Full text Electronic supplementary material About this article

Organolead halide perovskite solar cells have achieved a certified power-conversion efficiency (PCE) of 22.1% and are thus among the most promising candidates for next-generation photovoltaic devices. To date, most high-efficiency perovskite solar cells have employed arylamine-based hole-transport materials (HTMs), which are expensive and have a low mobility. The complicated doping procedures and the potentially stability-adverse dopants used in these HTMs are among the major bottlenecks for the commercialization of perovskite solar cells (PSCs). Herein, we present a polythiophene-based copolymer (PDVT-10) with a hole mobility up to 8.2 cm2·V-1·s-1 and a highest occupied molecular orbital level of -5.28 eV as a hole-transport layer (HTL) for a PSC. A device based on this new HTM exhibited a high PCE of 13.4% under 100 mW·cm-2 illumination, which is one of the highest PCEs reported for the dopant-free polymer-based HTLs. Moreover, PDVT-10 exhibited good solution processability, decent air stability, and thermal stability, making it a promising candidate as an HTM for PSCs.


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About this article

Highly π-extended copolymer as additive-free hole-transport material for perovskite solar cells

Show Author's information Jie Liu1,2, Qianqing Ge1,2, Weifeng Zhang1,2, Jingyuan Ma1,2, Jie Ding1,2, Gui Yu1,2( ), Jinsong Hu1,2( )
Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Molecular Nanostructure and NanotechnologyCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China
University of Chinese Academy of SciencesBeijing100049China

Abstract

Organolead halide perovskite solar cells have achieved a certified power-conversion efficiency (PCE) of 22.1% and are thus among the most promising candidates for next-generation photovoltaic devices. To date, most high-efficiency perovskite solar cells have employed arylamine-based hole-transport materials (HTMs), which are expensive and have a low mobility. The complicated doping procedures and the potentially stability-adverse dopants used in these HTMs are among the major bottlenecks for the commercialization of perovskite solar cells (PSCs). Herein, we present a polythiophene-based copolymer (PDVT-10) with a hole mobility up to 8.2 cm2·V-1·s-1 and a highest occupied molecular orbital level of -5.28 eV as a hole-transport layer (HTL) for a PSC. A device based on this new HTM exhibited a high PCE of 13.4% under 100 mW·cm-2 illumination, which is one of the highest PCEs reported for the dopant-free polymer-based HTLs. Moreover, PDVT-10 exhibited good solution processability, decent air stability, and thermal stability, making it a promising candidate as an HTM for PSCs.

Keywords: stability, perovskite solar cell, hole-transport layer, dopant-free, PDVT-10

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Publication history
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Acknowledgements

Publication history

Received: 10 February 2017
Revised: 06 April 2017
Accepted: 06 April 2017
Published: 01 July 2017
Issue date: January 2018

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany 2017

Acknowledgements

Acknowledgements

This work was supported by the National Basic Research Program of China (No. 2015CB932302), the National Natural Science Foundation of China (Nos. 21573249 and 21474116), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Nos. XDB12020100 and XDB12030100).

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