@article{7e58a9e7e1c04e93a13122cb9d4d0097,
title = "High-Efficiency Perovskite Solar Cells Enabled by Anatase TiO2 Nanopyramid Arrays with an Oriented Electric Field",
abstract = "One-dimensional (1D) nanostructured oxides are proposed as excellent electron transport materials (ETMs) for perovskite solar cells (PSCs); however, experimental evidence is lacking. A facile hydrothermal approach was employed to grow highly oriented anatase TiO2 nanopyramid arrays and demonstrate their application in PSCs. The oriented TiO2 nanopyramid arrays afford sufficient contact area for electron extraction and increase light transmission. Moreover, the nanopyramid array/perovskite system exhibits an oriented electric field that can increase charge separation and accelerate charge transport, thereby suppressing charge recombination. The anatase TiO2 nanopyramid array-based PSCs deliver a champion power conversion efficiency of approximately 22.5 %, which is the highest power conversion efficiency reported to date for PSCs consisting of 1D ETMs. This work demonstrates that the rational design of 1D ETMs can achieve PSCs that perform as well as typical mesoscopic and planar PSCs.",
keywords = "1D nanostructures, anatase TiO, electric field distribution, nanopyramid arrays, power conversion efficiency",
author = "Yinhua Lv and Ruihan Yuan and Bing Cai and Behzad Bahrami and Chowdhury, {Ashraful Haider} and Chi Yang and Yihui Wu and Qiquan Qiao and Shengzhong Liu and Zhang, {Wen Hua}",
note = "Funding Information: The authors are grateful for support from the National Natural Science Foundation of China (Grant Nos. 21773218 and 61904166), key research and development projects of Sichuan province (Grant No. 2017GZ0052), talents of science and technology innovation in Sichuan province (Grant No. 2018RZ0119), China Postdoctoral Science Foundation (Grant No. 2019M653485), and Anshan Hifichem Co. Ltd. Q.Q. acknowledges support from NSF MRI (1428992), U.S.-Egypt Science and Technology (S&T) Joint Fund, SDBoR R&D Program, and the EDA University Center Program (ED18DEN3030025). Funding Information: The authors are grateful for support from the National Natural Science Foundation of China (Grant Nos. 21773218 and 61904166), key research and development projects of Sichuan province (Grant No. 2017GZ0052), talents of science and technology innovation in Sichuan province (Grant No. 2018RZ0119), China Postdoctoral Science Foundation (Grant No. 2019M653485), and Anshan Hifichem Co. Ltd. Q.Q. acknowledges support from NSF MRI (1428992), U.S.‐Egypt Science and Technology (S&T) Joint Fund, SDBoR R&D Program, and the EDA University Center Program (ED18DEN3030025). Publisher Copyright: {\textcopyright} 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2020",
month = jul,
day = "13",
doi = "10.1002/anie.201915928",
language = "English (US)",
volume = "59",
pages = "11969--11976",
journal = "Angewandte Chemie - International Edition",
issn = "1433-7851",
publisher = "John Wiley and Sons Ltd",
number = "29",
}