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
Abstract 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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