Benzotrithiophene-Based Hole-Transporting Materials for 18.2 % Perovskite Solar Cells

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 trihalid...

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Published in:Angewandte Chemie International Edition 2016-05, Vol.55 (21), p.6270-6274
Main Authors: Molina-Ontoria, Agustín, Zimmermann, Iwan, Garcia-Benito, Inés, Gratia, Paul, Roldán-Carmona, Cristina, Aghazada, Sadig, Graetzel, Michael, Nazeeruddin, Mohammad Khaja, Martín, Nazario
Format: Article
Language:English
Subjects:
benzotrithiophenes
Crosslinking
Energy conversion efficiency
Lead
Perovskites
Photovoltaic cells
power conversion efficiency
Solar cells
Solar power
Transportation
triarylamines
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Summary: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). Promising new candidates: Benzotrithiophenes (BTT) with different donor moieties are introduced as hole‐transporting materials for perovskite solar cells. The incorporation of these new derivatives in photovoltaic devices leads to power conversion efficiencies (PCE) up to 18.2 %, thus paving the way to very efficient and highly versatile materials for light‐energy conversion.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201511877