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A New 1,3,4‐Oxadiazole‐Based Hole‐Transport Material for Efficient CH 3 NH 3 PbBr 3 Perovskite Solar Cells
Author(s) -
Carli Stefano,
Baena Juan Pablo Correa,
Marianetti Giulia,
Marchetti Nicola,
Lessi Marco,
Abate Antonio,
Caramori Stefano,
Grätzel Michael,
Bellina Fabio,
Bignozzi Carlo Alberto,
Hagfeldt Anders
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201501665
Subject(s) - perovskite (structure) , chemistry , materials science , perovskite solar cell , inorganic chemistry , crystallography
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 CH 3 NH 3 PbBr 3 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).