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Benzotrithiophene‐Based Hole‐Transporting Materials for 18.2 % Perovskite Solar Cells
Author(s) -
MolinaOntoria Agustín,
Zimmermann Iwan,
GarciaBenito Inés,
Gratia Paul,
RoldánCarmona Cristina,
Aghazada Sadig,
Graetzel Michael,
Nazeeruddin Mohammad Khaja,
Martín Nazario
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201511877
Subject(s) - trihalide , perovskite (structure) , materials science , energy conversion efficiency , chemical engineering , nanotechnology , optoelectronics , combinatorial chemistry , chemistry , inorganic chemistry , halide , engineering
New star‐shaped benzotrithiophene (BTT)‐based hole‐transporting materials (HTM) BTT‐1, BTT‐2 and BTT‐3 have been obtained through a facile synthetic route by crosslinking triarylamine‐based donor groups with a benzotrithiophene (BTT) core. The BTT HTMs were tested on solution‐processed lead trihalide perovskite‐based solar cells. Power conversion efficiencies in the range of 16 % to 18.2 % were achieved under AM 1.5 sun with the three derivatives. These values are comparable to those obtained with today's most commonly used HTM spiro‐OMeTAD, which point them out as promising candidates to be used as readily available and cost‐effective alternatives in perovskite solar cells (PSCs).