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Near‐Infrared‐Absorbing and Dopant‐Free Heterocyclic Quinoid‐Based Hole‐Transporting Materials for Efficient Perovskite Solar Cells
Author(s) -
Ni JenShyang,
Hsieh HsiaoChi,
Chen ChunAn,
Wen YuhSheng,
Wu WenTi,
Shih YenChen,
Lin KingFu,
Wang Leeyih,
Lin Jiann T.
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201600923
Subject(s) - dopant , perovskite (structure) , materials science , infrared , doping , perovskite solar cell , electron mobility , absorption (acoustics) , solar cell , photochemistry , optoelectronics , chemistry , crystallography , optics , composite material , physics
New heterocyclic quinoid‐based hole transporting materials (HTMs) with a rigid quinoid core [3,6‐di(2 H ‐imidazol‐2‐ylidene)cyclohexa‐1,4‐diene] have been synthesized. The new HTMs have good hole mobility (>10 −4 cm 2 V −1 s −1 ) and very intense absorption in the near‐infrared region extending to >800 nm. High performance perovskite solar cells can be fabricated using these HTMs without dopant. The best cell efficiency under simulated AM 1.5 G illumination reaches 12.22 %, which is comparable with that (12.58 %) using doped 2,2′,7,7′‐tetrakis‐( N , N ‐di‐4‐methoxyphenylamino)‐9,9′‐spirobifluorene (spiro‐OMeTAD) as the HTM.