Benzotrithiophene‐Based Hole‐Transporting Materials for 18.2 % Perovskite Solar Cells. Issue 21 (8th April 2016)

• Record Type: Journal Article
• Authors: Molina‐Ontoria, Agustín; Zimmermann, Iwan; Garcia‐Benito, Inés; Gratia, Paul; Roldán‐Carmona, Cristina; Aghazada, Sadig; Graetzel, Michael; Nazeeruddin, Mohammad Khaja; Martín, Nazario
• Is Part Of: Angewandte Chemie international edition. Volume 55:Issue 21(2016)
• Page Start: 6270
• Page End: 6274
• Publication Date: 2016-04-08
• Subjects: benzotrithiophenes -- perovskites -- power conversion efficiency -- solar cells -- triarylamines; Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201511877
• Languages: English
• ISSNs: 1433-7851

Abstract

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). Abstract : 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.