A New 1,3,4-Oxadiazole-Based Hole-Transport Material for Efficient CH3 NH3 PbBr3 Perovskite Solar Cells

Stefano Carli; Juan Pablo Correa Baena; Giulia Marianetti; Nicola Marchetti; Marco Lessi; Antonio Abate; Stefano Caramori; Michael Grätzel; Fabio Bellina; Carlo Alberto Bignozzi; Anders Hagfeldt

doi:10.1002/cssc.201501665

A New 1,3,4-Oxadiazole-Based Hole-Transport Material for Efficient CH3 NH3 PbBr3 Perovskite Solar Cells

ChemSusChem. 2016 Apr 7;9(7):657-61. doi: 10.1002/cssc.201501665. Epub 2016 Feb 16.

Authors

Affiliations

¹ Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, Via Fossato di Mortara 17, 44121, Ferrara, Italy. crlsfn@unife.it.
² Laboratory of Photomolecular Science, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Station 6, 1015, Lausanne, Switzerland. juan.correa@epfl.ch.
³ Scuola Normale Superiore, 56126, Pisa, Italy.
⁴ Department of Chemistry and Pharmaceutical Sciences, University of Ferrara, Via Fossato di Mortara 17, 44121, Ferrara, Italy.
⁵ Department of Chemistry and Industrial Chemistry, University of Pisa, 56126, Pisa, Italy.
⁶ Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland.
⁷ Laboratory of Photomolecular Science, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Station 6, 1015, Lausanne, Switzerland.

PMID: 26880477
DOI: 10.1002/cssc.201501665

Abstract

A new hole-transport material (HTM) based on the 1,3,4-oxadiazole moiety (H1) was prepared through a single-step synthetic pathway starting from commercially available products. Thanks to a deep HOMO level, H1 was used as HTM in CH3 NH3 PbBr3 perovskite solar cells yielding an efficiency of 5.8%. The reference HTM (Spiro-OMeTAD), under the same testing conditions, furnished a lower efficiency of 5.1%. Steady-state and time-resolved photoluminescence of the thin films showed good charge-extraction dynamics for H1 devices. In addition, H1 shows a large thermal stability and completely amorphous behavior (as evaluated by thermal gravimetric analysis and differential scanning calorimetry).

Keywords: hole transport; oxadiazole; perovskite; solar cells; titania.

Publication types

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

MeSH terms

Calcium Compounds / chemistry*
Calorimetry, Differential Scanning
Electric Power Supplies*
Microscopy, Electron, Scanning
Oxadiazoles / chemistry*
Oxides / chemistry*
Solar Energy*
Titanium / chemistry*

Substances

Calcium Compounds
Oxadiazoles
Oxides
perovskite
1,3,4-oxadiazole
Titanium