@article{270f7ba59b4840e99e098705742b0906,
title = "Simultaneous band-gap narrowing and carrier-lifetime prolongation of organic-inorganic trihalide perovskites",
abstract = "The organic-inorganic hybrid lead trihalide perovskites have been emerging as the most attractive photovoltaic materials. As regulated by Shockley-Queisser theory, a formidable materials science challenge for improvement to the next level requires further band-gap narrowing for broader absorption in solar spectrum, while retaining or even synergistically prolonging the carrier lifetime, a critical factor responsible for attaining the near-band-gap photovoltage. Herein, by applying controllable hydrostatic pressure, we have achieved unprecedented simultaneous enhancement in both band-gap narrowing and carrier-lifetime prolongation (up to 70% to ?100% increase) under mild pressures at ?0.3 GPa. The pressure-induced modulation on pure hybrid perovskites without introducing any adverse chemical or thermal effect clearly demonstrates the importance of band edges on the photon-electron interaction and maps a pioneering route toward a further increase in their photovoltaic performance.",
keywords = "Band gap, Carrier lifetime, High pressure, Perovskite|solar cell",
author = "Lingping Kong and Gang Liua and Jue Gong and Qingyang Hu and Schaller, {Richard D.} and Przemyslaw Dera and Dongzhou Zhang and Zhenxian Liu and Wenge Yang and Kai Zhu and Yuzhao Tang and Chuanyi Wang and Wei, {Su Huai} and Tao Xu and Mao, {Ho Kwang}",
note = "Funding Information: We thank Dr. Changyong Park, Dr. Sergey Tkachev, Dr. Dmitry Popov, Dr. Saul H. Lapidus, and Dr. Zhongwu Wang for technical support on crystal characterizations and Dr. Jin Zhang for indexing software support. G.L. and H.-k.M. acknowledge support from National Nature Science Associate Foundation (NSAF) Grant U1530402. T.X. acknowledges support from US National Science Foundation Grant CBET (Division of Chemical, Bioengineering, Environmental, and Transport Systems)-1150617. High-pressure crystal structure characterizations were performed at beamline 13 BM-C at GeoSoilEnviroCARS (APS, ANL) and the Cornell High Energy Synchrotron Source (CHESS), which are supported by National Science Foundation Grants EAR (Division of Earth Sciences)-1128799 and DMR (Division of Materials Research)-0936384. This work was also performed at the CNM, ANL; the 11-BM, APS; and the Infrared Laboratory of the National Synchrotron Light Source II (NSLS II), BNL. The use of APS and CNM facilities was supported by US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences Grant DE-AC02-06CH11357. The Infrared Laboratory was supported by the National Science Foundation (Grant EAR 1606856, Consortium for Materials Properties Research in Earth Sciences) and DOE/ National Nuclear Security Administration [Grant DOE/National Nuclear Security Administration (NNSA)-0002006, Confidentiality and Data Access Committee]. Part of this work was carried out at BL01B beamline [Shanghai Synchrotron Radiation Facility (SSRF)]. The work at the National Renewable Energy Laboratory was supported by DOE Contract DE-AC36-08-GO28308. This work was supported by National Nature Science Foundation of China Grant 21428305.",
year = "2016",
month = aug,
day = "9",
doi = "10.1073/pnas.1609030113",
language = "English",
volume = "113",
pages = "8910--8915",
journal = "Proceedings of the National Academy of Sciences of the United States of America",
issn = "0027-8424",
publisher = "National Academy of Sciences",
number = "32",
}