Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 51, Pages 18460-18465Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201911796
Keywords
electron-transporting layers; mesoporous structures; perovskite solar cells; photostability; ZTO
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Funding
- Ministry of Science and Technology of China (973 project) [2014CB239303]
- National Natural Science Foundation of China [21701015, 2171101421, 21821004]
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Perovskite solar cells (PSCs) with power conversion efficiencies (PCEs) of 25 % mainly have SnO2 or TiO2 as electron-transporting layers (ETLs). Now, zinc titanate (ZnTiO3, ZTO) is proposed as mesoporous ETLs owing to its weak photo-effect, excellent carrier extraction, and transfer properties. Uniform mesoporous films were obtained by spinning coating the ZTO ink and annealed below 150 degrees C. Photovoltaic devices based on Cs(0.05)FA(0.81)MA(0.14)PbI(2.55)B(r0.45) perovskite sandwiched between SnO2-mesorporous ZTO electrode and Spiro-OMeTAD layer achieved the PCE of 20.5 %. The PSCs retained more than 95 % of their original efficiency after 100 days lifetime test without being encapsulated. Additionally, the PSCs retained over 95 % of the initial performance when subjected at the maximum power point voltage for 120 h under AM 1.5 G illumination (100 mW cm(-2)), demonstrating superior working stability. The application of ZTO provides a better choice for ETLs of PSCs.
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