@article{3bb4010268d6438fbf15594fa53c5e99,
title = "Self-Assembly Atomic Stacking Transport Layer of 2D Layered Titania for Perovskite Solar Cells with Extended UV Stability",
abstract = "A novel atomic stacking transporting layer (ASTL) based on 2D atomic sheets of titania (Ti1−δO2) is demonstrated in organic–inorganic lead halide perovskite solar cells. The atomically thin ASTL of 2D titania, which is fabricated using a solution-processed self-assembly atomic layer-by-layer deposition technique, exhibits the unique features of high UV transparency and negligible (or very low) oxygen vacancies, making it a promising electron transporting material in the development of stable and high-performance perovskite solar cells. In particular, the solution-processable atomically thin ASTL of 2D titania atomic sheets shows superior inhibition of UV degradation of perovskite solar cell devices, compared to the conventional high-temperature sintered TiO2 counterpart, which usually causes the notorious instability of devices under UV irradiation. The discovery opens up a new dimension to utilize the 2D layered materials with a great variety of homostructrual or heterostructural atomic stacking architectures to be integrated with the fabrication of large-area photovoltaic or optoelectronic devices based on the solution processes.",
keywords = "2D materials, low-temperature processes, perovskite solar cells, stability",
author = "Chen, {Tzu Pei} and Lin, {Chung Wei} and Li, {Shao Sian} and Tsai, {Yung Han} and Wen, {Cheng Yen} and Lin, {Wendy Jessica} and Hsiao, {Fei Man} and Chiu, {Ya Ping} and Kazuhito Tsukagoshi and Minoru Osada and Takayoshi Sasaki and Chen, {Chun Wei}",
note = "Funding Information: T.-P.C., C.-W.L., and S.-S.L. contributed equally to this work. T.-P.C., C.-W. L., and S.-S.L. designed and took most of the experimental measurements. Y.-H.T. and W.J.L. prepared and optimized the ASTLs. C.-Y.W. performed the TEM and EELS measurements. F.-M.H. and Y.-P.C. performed the STM and STS measurements. M.O., K.T., and T.S. synthesized the 2D atomic sheets of titania. C.-W.C. and M.O. supervised the whole project and wrote the article. This work was supported by the Minstry of Science and Technology (MOST), Taiwan (Project Nos. 104-2811-M-002-189, 105-2112-M-002-011-MY3, and 105-2923-M-002-009-MY2), the Taiwan Consortium of Emergent Crystalline Materials (TCECM) and Center of Strategic Materials Alliance for Research and Technology (SMART Center) of the National Taiwan University (NTU), Taiwan, and the National Institute for Materials Science (NIMS), Japan. The authors would also like to thank Prof. Chu-Chen Chueh for valuable suggestion. Publisher Copyright: {\textcopyright} 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2018",
month = jan,
day = "15",
doi = "10.1002/aenm.201701722",
language = "English",
volume = "8",
journal = "Advanced Energy Materials",
issn = "1614-6832",
publisher = "Wiley-VCH Verlag",
number = "2",
}
