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

Agustín Molina-Ontoria; Iwan Zimmermann; Inés Garcia-Benito; Paul Gratia; Cristina Roldán-Carmona; Sadig Aghazada; Michael Graetzel; Mohammad Khaja Nazeeruddin; Nazario Martín

doi:10.1002/anie.201511877

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

Angew Chem Int Ed Engl. 2016 May 17;55(21):6270-4. doi: 10.1002/anie.201511877. Epub 2016 Apr 8.

Authors

Agustín Molina-Ontoria¹, Iwan Zimmermann², Inés Garcia-Benito¹, Paul Gratia², Cristina Roldán-Carmona², Sadig Aghazada², Michael Graetzel³, Mohammad Khaja Nazeeruddin⁴, Nazario Martín^{5

6}

Affiliations

¹ IMDEA-Nanociencia, C/ Faraday 9, Ciudad, Universitaria de Cantoblanco, 28049, Madrid, Spain.
² Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, EPFL VALAIS, 1951, Sion, Switzerland.
³ Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, EPFL VALAIS, 1015, Lausanne, Switzerland.
⁴ Group for Molecular Engineering of Functional Materials, Institute of Chemical Sciences and Engineering, EPFL VALAIS, 1951, Sion, Switzerland. mdkhaja.nazeeruddin@epfl.ch.
⁵ IMDEA-Nanociencia, C/ Faraday 9, Ciudad, Universitaria de Cantoblanco, 28049, Madrid, Spain. nazmar@ucm.es.
⁶ Departamento Química Orgánica, Facultad C. C. Químicas, Universidad Complutense de Madrid, Av. Complutense s/n, 28040, Madrid, Spain. nazmar@ucm.es.

PMID: 27061436
DOI: 10.1002/anie.201511877

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).

Keywords: benzotrithiophenes; perovskites; power conversion efficiency; solar cells; triarylamines.

Publication types

Research Support, Non-U.S. Gov't