A new strategy for constructing a dispiro-based dopant-free hole-transporting material: spatial configuration of spiro-bifluorene changes from a perpendicular to parallel arrangement.

Zhongquan Wan, Jinyu Yang, Jianxing Xia, Hongyu Shu, Xiaojun Yao, Junsheng Luo, Chunyang Jia

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Article in Chemical science, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

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2citing papers in PubMed

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Synthesis of 2,7-Dihydrooxepine-spirodithiophene Derivatives via an Intramolecular Ring Closure Reaction.ACS omega · 2024
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Controlling Molecular Orientation of Small Molecular Dopant-Free Hole-Transport Materials: Toward Efficient and Stable Perovskite Solar Cells.Molecules (Basel, Switzerland) · 2023
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Zhongquan WanState Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering, University of Electronic Science and Technology of China Chengdu 610054 China zqwan@uestc.edu.cn cyjia@uestc.edu.cn.ORCID https://orcid.org/0000-0001-6480-9464

Jinyu YangState Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering, University of Electronic Science and Technology of China Chengdu 610054 China zqwan@uestc.edu.cn cyjia@uestc.edu.cn.

Jianxing XiaState Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering, University of Electronic Science and Technology of China Chengdu 610054 China zqwan@uestc.edu.cn cyjia@uestc.edu.cn.

Hongyu ShuState Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering, University of Electronic Science and Technology of China Chengdu 610054 China zqwan@uestc.edu.cn cyjia@uestc.edu.cn.

Xiaojun YaoState Key Laboratory of Applied Organic Chemistry, Lanzhou University Lanzhou 730000 China.ORCID https://orcid.org/0000-0002-8974-0173

Junsheng LuoState Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering, University of Electronic Science and Technology of China Chengdu 610054 China zqwan@uestc.edu.cn cyjia@uestc.edu.cn.

Chunyang JiaState Key Laboratory of Electronic Thin Films and Integrated Devices, School of Electronic Science and Engineering, University of Electronic Science and Technology of China Chengdu 610054 China zqwan@uestc.edu.cn cyjia@uestc.edu.cn.ORCID https://orcid.org/0000-0001-6326-1679

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No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Due to the low intrinsic hole mobility caused by the orthogonal conformation of two fluorene units in Spiro-OMeTAD which is a classic hole-transporting material (HTM) in perovskite solar cells (PSCs), Spiro-OMeTAD based PSCs generally can only obtain high performances through a sophisticated doping process with dopants/additives, which adds to the cost and complicacy of device fabrication, and also adversely affects the stability of PSC devices. Herein, a novel dispiro-based HTM, WH-1, is designed by cleverly replacing the central carbon atom of Spiro-OMeTAD with cyclohexane, and the spatial configuration of the HTM is changed from vertical orthogonality of the two fluorene units to a parallel arrangement, which is beneficial for the formation of a homogeneous and compact HTM film on the surface of the perovskite film, improvement of intermolecular electronic coupling and intrinsic hole mobility. WH-1 is obtained by two-step facile synthesis with a high yield from commercially available materials. WH-1 is used in PSCs as a dopant-free HTM, which is the first time that the dispiro-based molecule has been applied as a dopant-free HTM, and a power conversion efficiency (PCE) of 19.57% is obtained, rivaling Li-TFSI/

Identifiers

PMID34221336

DOI10.1039/d1sc01416a

PMCPMC8221193

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