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Room‐Temperature‐Processed, Carbon‐Based Fully Printed Mesoscopic Perovskite Solar Cells with 15% Efficiency
Author(s) -
Liu Jian,
Wang Dongjie,
Zhang Yang,
Chen Kun,
She Bin,
Liu Baichen,
Zhang Zheling,
Huang Yu,
Xiong Jian,
Zhang Hailiang,
Zhang Jian
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.202100274
Subject(s) - methylamine , mesoscopic physics , solvent , perovskite (structure) , materials science , chemical engineering , photovoltaic system , relative humidity , chemistry , organic chemistry , physics , thermodynamics , electrical engineering , quantum mechanics , engineering
Methylamine (MA) and methylamine hydrochloride (MACl) are widely used to prepare highly efficient and stable perovskite solar cells (PSCs). However, MA, as a gas, is difficult to handle and inevitably leads to a large amount of escape, and it is difficult to quantitatively calculate. Herein, selecting a mixture solvent of methylamine ethanol solution (MA‐EtOH sol) and acetonitrile (ACN) as a solvent, a new strategy for preparing fully printed mesoscopic perovskite solar cells (MPSCs) at room temperature is first proposed. With the introduction of 20 mol% MACl as additive, the fully printed MPSCs are fabricated without any posttreatment at room temperature via a one‐step drop‐coating method. As a consequence, the average power conversion efficiency (PCE) of 14.73 ± 0.3% (0.1 cm 2 ) with almost no hysteresis is achieved. Most importantly, the device also exhibits excellent long‐term stability when it is unencapsulated. Specifically, the unencapsulated device still retains nearly 100% of its original PCE after 64 days and 88% after 81 days of storage in the dark with a humidity of 50 ± 5% in an atmospheric environment. It provides a new idea for constructing fully printed MPSCs at room temperature in the future.