title: Superior Optical Properties of Perovskite Nanocrystals as Single Photon Emitters.
abstract: The power conversion efficiency of photovoltaic devices based on semiconductor perovskites has reached ∼20% after just several years of research efforts. With concomitant discoveries of other promising applications in lasers, light-emitting diodes, and photodetectors, it is natural to anticipate what further excitement these exotic perovskites could bring about. Here we report on the observation of single photon emission from single CsPbBr3 perovskite nanocrystals (NCs) synthesized from a facile colloidal approach. Compared with traditional metal-chalcogenide NCs, these CsPbBr3 NCs exhibit nearly 2 orders of magnitude increase in their absorption cross sections at similar emission colors. Moreover, the radiative lifetime of CsPbBr3 NCs is greatly shortened at both room and cryogenic temperatures to favor an extremely fast output of single photons. The above superior optical properties have paved the way toward quantum-light applications of perovskite NCs in various quantum information processing schemes.
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.
authors.forename: Fengrui
authors.initials: F
authors.lastname: Hu
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.|College of Electronics and Information, Hangzhou Dianzi University , Xiasha Campus, Hangzhou 310018, China.
authors.forename: Huichao
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Key Laboratory on Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University , Changchun 130012, China.
authors.forename: Chun
authors.initials: C
authors.lastname: Sun
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.
authors.forename: Chunyang
authors.initials: C
authors.lastname: Yin
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.
authors.forename: Bihu
authors.initials: B
authors.lastname: Lv
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.
authors.forename: Chunfeng
authors.initials: C
authors.lastname: Zhang
authors.affiliation: State Key Laboratory on Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University , Changchun 130012, China.
authors.forename: William W
authors.initials: WW
authors.lastname: Yu
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory on Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University , Changchun 130012, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.|Department of Physics, University of Arkansas , Fayetteville, Arkansas 72701, United States.
authors.forename: Min
authors.initials: M
authors.lastname: Xiao
keywords: blinking; nanocrystal; perovskite; single photon emission