Benzotrithiophene‐Based Hole‐Transporting Materials for 18.2 % Perovskite Solar Cells
Article 2016 en
Authors
AM
Agustín Molina‐Ontoria
IZ
Iwan Zimmermann
IG
Inés García‐Benito
Abstract
1 min read
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).
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