@article{9b132e82dd154538a2395ba71b3103b1,
title = "Lithium-Ion Endohedral Fullerene (Li+@C60) Dopants in Stable Perovskite Solar Cells Induce Instant Doping and Anti-Oxidation",
abstract = "Herein, we report use of [Li+@C60]TFSI− as a dopant for spiro-MeOTAD in lead halide perovskite solar cells. This approach gave an air stability nearly 10-fold that of conventional devices using Li+TFSI−. Such high stability is attributed to the hydrophobic nature of [Li+@C60]TFSI− repelling moisture and absorbing intruding oxygen, thereby protecting the perovskite device from degradation. Furthermore, [Li+@C60]TFSI− could oxidize spiro-MeOTAD without the need for oxygen. The encapsulated devices exhibited outstanding air stability for more than 1000 h while illuminated under ambient conditions.",
keywords = "air stability, doping, fullerenes, lithium, perovskite solar cells",
author = "Il Jeon and Hiroshi Ueno and Seungju Seo and Kerttu Aitola and Ryosuke Nishikubo and Akinori Saeki and Hiroshi Okada and Gerrit Boschloo and Shigeo Maruyama and Yutaka Matsuo",
note = "Funding Information: We thank the Research and Education Consortium for Innovation of Advanced Integrated Science by Japan Science and Technology (JST), Japan Society for the Promotion of Science (JSPS) KAKENHI (Grant Numbers JP15H05760, JP16H02285, 17K04970, and 17H06609), and support from the Thousand Talent Plan for Foreign Experts. Publisher Copyright: {\textcopyright} 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",
year = "2018",
month = apr,
day = "16",
doi = "10.1002/anie.201800816",
language = "English",
volume = "57",
pages = "4607--4611",
journal = "Angewandte Chemie - International Edition",
issn = "1433-7851",
publisher = "John Wiley and Sons Ltd",
number = "17",
}