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Chem Commun (Camb). 2018 Aug 23;54(69):9571-9574. doi: 10.1039/c8cc04026e.

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

Author information

1
Organic Chemistry, Department of Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden. lichengs@kth.se.
2
Department of Materials Science and Engineering, 22 Alliance Lane, Monash University, VIC 3800, Australia.
3
Applied Physical Chemistry, Center of Molecular Devices, Department of Chemistry, KTH-Royal Institute of Technology, SE-10044 Stockholm, Sweden.
4
Department of Chemistry, Ångström Laboratory, Box 523, Uppsala University, 75120 Uppsala, Sweden.
5
Department of Material and Environmental Chemistry (MMK), Stockholm University, SE-10691 Stockholm, Sweden.
6
Wallenberg Wood Science Center, Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
7
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.
8
Organic Chemistry, Department of Chemistry, KTH Royal Institute of Technology, SE-10044 Stockholm, Sweden. lichengs@kth.se and 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.

PMID:
30043013
DOI:
10.1039/c8cc04026e

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