Design and synthesis of dopant-free organic hole-transport materials for perovskite solar cells

Linqin Wang; Jinbao Zhang; Peng Liu; Bo Xu; Biaobiao Zhang; Hong Chen; A. Ken Inge; Yuanyuan Li; Haoxin Wang; Yi-Bing Cheng; Lars Kloo; Licheng Sun

doi:10.1039/C8CC04026E

Design and synthesis of dopant-free organic hole-transport materials for perovskite solar cells†

Linqin Wang,‡^a Jinbao Zhang,‡^b Peng Liu,‡^c Bo Xu,^d Biaobiao Zhang,

^a Hong Chen,

^a A. Ken Inge,

^e Yuanyuan Li,

^f Haoxin Wang,^g Yi-Bing Cheng,

^b Lars Kloo^c and Licheng Sun

*^ag

Author affiliations

* Corresponding authors

^a Organic Chemistry, Department of Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden
E-mail: lichengs@kth.se

^b Department of Materials Science and Engineering, 22 Alliance Lane, Monash University, VIC 3800, Australia

^c Applied Physical Chemistry, Center of Molecular Devices, Department of Chemistry, KTH-Royal Institute of Technology, SE-10044 Stockholm, Sweden

^d Department of Chemistry, Ångström Laboratory, Box 523, Uppsala University, 75120 Uppsala, Sweden

^e Department of Material and Environmental Chemistry (MMK), Stockholm University, SE-10691 Stockholm, Sweden

^f Wallenberg Wood Science Center, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden

^g State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Dalian University of Technology, 116024 Dalian, China

Abstract

Two novel dopant-free hole-transport materials (HTMs) with spiro[dibenzo[c,h]xanthene-7,9′-fluorene] (SDBXF) skeletons were prepared via facile synthesis routes. A power conversion efficiency of 15.9% in perovskite solar cells is attained by using one HTM without dopants, which is much higher than undoped Spiro-OMeTAD-based devices (10.8%). The crystal structures of both new HTMs were systematically investigated to reveal the reasons behind such differences in performance and to indicate the design principles of more advanced HTMs.

Chemical Communications

Design and synthesis of dopant-free organic hole-transport materials for perovskite solar cells†

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Design and synthesis of dopant-free organic hole-transport materials for perovskite solar cells

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