@article{dafaccfc3f2e4930899a28141953b627,
title = "One- And Two-Photon Excited Photoluminescence and Suppression of Thermal Quenching of CsSnBr3Microsquare and Micropyramid",
abstract = "Thermal photoluminescence (PL) quenching is fundamentally important for perovskite optoelectronic applications. Herein, we investigated PL characteristics of CsSnBr3 microsquares and micropyramids synthesized by chemical vapor deposition (CVD) and their PL quenching behavior at high temperature. These microstructures have favorable PL performances in ambient atmosphere. Under two-photon excitation, we observed whispering gallery modes (WGMs) in microsquares and amplified spontaneous emission (ASE) in micropyramids. Reversible PL losses due to thermal effect were observed for both samples. Monotonic blue shifts in PL emission upon temperature increase suggest a band gap widening associated with an emphanisis effect. Temperature-dependent spectral line width analysis reveals that a line width broadening is attributed to the dominant electron-longitudinal optical phonon interaction. The estimated activation energy of thermally assisted nonradiative recombination for CsSnBr3 microsquares and micropyramids is over 310 meV by the Arrhenius equation, which is higher than CsPbBr3. These results prove that CsSnBr3 exhibits better thermal stability than Pb-based perovskites. ",
author = "Wu, {Zong Yu} and Zhuang, {Jie Hao} and Lin, {Yu Tsung} and Chou, {Yu Hsun} and Wu, {Pin Chieh} and Wu, {Chung Lin} and Peter Chen and Hsu, {Hsu Cheng}",
note = "Funding Information: This research received funding from Ministry of Science and Technology, Taiwan (MOST) (MOST Grants 109-2112-M-006-016 and 110-2112-M-006-019). The authors gratefully thank Dr. Kuang-I Lin at the Core Facility Center (CFC) of National Cheng Kung University and Kun-Hsu Lee of the equipment facility belonging to the Core Facility Center (CFC) of National Cheng Kung University for helpful discussions and support. Y.-H.C. acknowledges the support from MOST (Grant 109-2636-M-006-014 (Young Scholar Fellowship Program)). P.C.W. acknowledges the support from MOST (Grants 107-2923-M-006-004-MY3, 108-2112-M-006-021-MY3, and 110-2124-M-006-004). This research was supported in part from the Higher Education Sprout Project, Ministry of Education (MOE) to the Headquarters of University Advancement at National Cheng Kung University (NCKU). P.C.W. also acknowledges the support from the Ministry of Education (Yushan Young Scholar Program), Taiwan. Funding Information: This research received funding from Ministry of Science and Technology, Taiwan (MOST) (MOST Grants 109-2112-M-006-016 and 110-2112-M-006-019). The authors gratefully thank Dr. Kuang-I Lin at the Core Facility Center (CFC) of National Cheng Kung University and Kun-Hsu Lee of the equipment facility belonging to the Core Facility Center (CFC) of National Cheng Kung University for helpful discussions and support. Y.-H.C. acknowledges the support from MOST (Grant 109-2636-M-006-014 (Young Scholar Fellowship Program)). P.C.W. acknowledges the support from MOST (Grants 107-2923-M-006-004-MY3, 108-2112-M-006-021-MY3 and 110-2124-M-006-004). This research was supported in part from the Higher Education Sprout Project, Ministry of Education (MOE) to the Headquarters of University Advancement at National Cheng Kung University (NCKU). P.C.W. also acknowledges the support from the Ministry of Education (Yushan Young Scholar Program), Taiwan. Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",
year = "2021",
month = dec,
day = "28",
doi = "10.1021/acsnano.1c06762",
language = "English",
volume = "15",
pages = "19613--19620",
journal = "ACS nano",
issn = "1936-0851",
publisher = "American Chemical Society",
number = "12",
}