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Efficient and Stable Thin‐Film Luminescent Solar Concentrators Enabled by Near‐Infrared Emission Perovskite Nanocrystals
Author(s) -
Wu Jiajing,
Tong Jianyu,
Gao Yuan,
Wang Aifei,
Zhang Tao,
Tan Hairen,
Nie Shuming,
Deng Zhengtao
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201911638
Subject(s) - photoluminescence , luminescence , materials science , quantum yield , nanocrystal , full width at half maximum , perovskite (structure) , infrared , thin film , photoinitiator , polymer , optoelectronics , photochemistry , nanotechnology , optics , chemistry , crystallography , fluorescence , physics , monomer , composite material
A novel triphenylphosphine (TPP) treatment strategy was developed to prepare the near‐infrared emission CsPbI 3 nanocrystal (NC)‐polymer composite thin‐film luminescent solar concentrators (LSCs) featuring high absolute photoluminescence quantum yield (PLQY), low reabsorption, and high stability. The PL emission of the LSCs is centered at about 700 nm with 99.4±0.4 % PLQY and narrow full width at half maximum (FWHM) of 75 meV (30 nm). Compared with LSCs prepared with classic CsPbI 3 NCs, the stability of the LSCs after TPP treatments has been greatly improved, even after long‐term (30 days) immersion in water and strong mercury‐lamp irradiation (50 mW cm −2 ). Owing to the presence of lone‐pair electrons on the phosphorus atom, TPP is also used as a photoinitiator, with higher efficiency than other common photoinitiators. Large‐area (ca. 75 cm 2 ) infrared LSCs were achieved with a high optical conversion efficiency of 3.1 % at a geometric factor of 10.