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Liberating Researchers from the Glovebox: A Universal Thermal Radiation Protocol Toward Efficient Fully Air‐Processed Perovskite Solar Cells
Author(s) -
Wang Guoliang,
Liu Changwen,
Kong Weiguang,
Chen Hong,
Li Dedi,
Amini Abbas,
Xu Baomin,
Cheng Chun
Publication year - 2019
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.201800324
Subject(s) - perovskite (structure) , glovebox , materials science , crystallization , substrate (aquarium) , energy conversion efficiency , optoelectronics , nanotechnology , chemical engineering , chemistry , oceanography , organic chemistry , engineering , geology
Perovskite solar cells (PSCs) have developed rapidly in the past few years. However, highly efficient PSCs prepared in ambient air have remained intractable, since the crystallization and film morphology of perovskite are highly sensitive to moisture. Here, a thermal radiated hot‐cast method (THCM) to prepare high quality perovskite films in ambient air is introduced. The proposed THCM not only eliminates the temperature gradient across the perovskite film, but also forms a significantly reduced and constant relative humidity field at the local space above the substrate (ca. 6%); these conditions result in a smooth, compact, oriented perovskite film with largely reduced grain boundaries. THCM is a universal protocol, based on the application to the devices with both inverted and regular architectures, and it enables improved J–V performance with largely reduced hysteresis. The champion power conversion efficiencies of 17.2% for inverted and 19.1% for regular devices are achieved by THCM. These are comparable to the top efficiencies of fully air‐processed PSCs, demonstrating that THCM is a promising protocol for commercialization of PSCs in the near future.