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A Spirobixanthene‐Based Dendrimeric Hole‐Transporting Material for Perovskite Solar Cells
Author(s) -
Yu Wei,
Zhang Jinhui,
Tu Dandan,
Yang Qing,
Wang Xuchao,
Liu Xuan,
Cheng Feng,
Qiao Yu,
Li Gang,
Guo Xin,
Li Can
Publication year - 2020
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201900367
Subject(s) - dendrimer , materials science , perovskite (structure) , energy conversion efficiency , thermal stability , pinhole (optics) , phenylene , amorphous solid , hysteresis , layer (electronics) , optoelectronics , chemical engineering , nanotechnology , polymer , crystallography , optics , polymer chemistry , composite material , chemistry , engineering , physics , quantum mechanics
A dendrimer based on a spirobixanthene core, termed DH1, is designed and synthesized as a hole‐transporting material (HTM) for perovskite solar cells (PSCs). DH1 showing a hyperbranched structure with methoxydiphenylamine carbazole dendrons stretching outward along the para ‐phenylene spacer acquires a large molecular size of up to 1.9 nm, which favors good thermal stability and amorphous property. The thus obtained DH1‐based pinhole‐free film as a hole‐transport layer results in a power conversion efficiency of 17.13% and reduced hysteresis behavior of MAPbI 3 ‐based planar PSCs. This work provides the first example of the use of dendrimer‐type HTM for PSC application, demonstrating a promising approach to design HTMs in a quasiglobular dendrimer with a large molecular size.
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