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Methylamine Gas Treatment Affords Improving Semitransparency, Efficiency, and Stability of CH 3 NH 3 PbBr 3 ‐Based Perovskite Solar Cells
Author(s) -
Singh Ajay,
Matteocci Fabio,
Zhu Hongwei,
Rossi Daniele,
Mejaouri Salim,
Cacovich Stefania,
Auf Der Maur Matthias,
Sauvage Frédéric,
Gagliardi Alessio,
Grätzel Michael,
Di Carlo Aldo
Publication year - 2021
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.202100277
Subject(s) - perovskite (structure) , methylamine , energy conversion efficiency , stack (abstract data type) , chemistry , tandem , open circuit voltage , band gap , crystallization , solar cell , analytical chemistry (journal) , optoelectronics , chemical engineering , nanotechnology , materials science , crystallography , voltage , physics , organic chemistry , chromatography , quantum mechanics , computer science , programming language , composite material , engineering
High bandgap semitransparent solar cells based on CH 3 NH 3 PbBr 3 perovskites are attractive for building integration, tandem cells, and electrochemical applications. The lack of control of the CH 3 NH 3 PbBr 3 perovskite growth limit the exploitation of CH 3 NH 3 PbBr 3 ‐based perovskite solar cells. Herein, a post‐treatment is carried out after the initial CH 3 NH 3 PbBr 3 crystallization based on methylamine gas that drastically enhances the perovskite quality leading to a highly crystalline film with improved average visible transmittance (AVT) close to 56%. Opaque devices showed outstanding results in terms of open‐circuit voltage and power conversion efficiency (PCE) reaching 1.54 V and 9.2%, respectively. These achievements are ascribed to a film with reduced morphological defects and better interface quality and reduced nonradiative pathways. For the first time, the fabrication of semitransparent CH 3 NH 3 PbBr 3 ‐based solar cells is demonstrated reaching a maximum PCE equal to 7.6%, an AVT of the full stack device of 52%, and an excellent light stability at maximum‐power point tracking.