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Two‐Step Thermal Annealing: An Effective Route for 15 % Efficient Quasi‐2D Perovskite Solar Cells
Author(s) -
Romano Valentino,
Najafi Leyla,
Sutanto Albertus Adrian,
Schileo Giorgio,
Queloz Valentin,
Bellani Sebastiano,
Prato Mirko,
Marras Sergio,
Nazeeruddin Mohammad Khaja,
D'Angelo Giovanna,
Bonaccorso Francesco,
Grancini Giulia
Publication year - 2021
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.202000777
Subject(s) - materials science , annealing (glass) , energy conversion efficiency , homogeneity (statistics) , photovoltaic system , thermal , perovskite (structure) , chemical engineering , optoelectronics , nanotechnology , computer science , electrical engineering , physics , engineering , machine learning , meteorology , composite material
Low‐dimensional perovskites (LDP) are nowadays recognized as promising materials for the realization of highly performing photovoltaic cells. However, issues related to film morphology, composition, crystal quality and material homogeneity limit the device performances and reproducibility. In this work, we implement a robust method for the deposition of a LDP mixing methylammonium (MA) and phenylethylammonium (PEA) cations to create the mixed system (PEA) 2 MA 39 Pb 40 I 121 by using a two‐step thermal annealing treatment (at 60 and 100 °C). Our approach results in LDP films with high crystal quality and enhanced carrier lifetime, which double the power conversion efficiency of reference devices, reaching up to 15 %.