title: Exciton Relaxation Dynamics in Photo-Excited CsPbI3 Perovskite Nanocrystals.
abstract: The exciton relaxation process of CsPbI3 perovskite nanocrystals (NCs) has been investigated by using transient absorption (TA) spectroscopy. The hot exciton relaxation process is confirmed to exist in the CsPbI3 NCs, through comparing the TA data of CsPbI3 NCs in low and high energy excitonic states. In addition, the Auger recombination and intrinsic decay paths also participate in the relaxation process of CsPbI3 NCs, even the number of exciton per NC is estimated to be less than 1. Excitation intensity-dependent TA data further confirms the existence of Auger recombination. Meanwhile, the spectral data also confirms that the weight of hot exciton also increase together with that of Auger recombination at high excitation intensity when CsPbI3 NCs in high energy excitonic states.
authors.affiliation: Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China.
authors.forename: Qinghui
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China.
authors.forename: Yinghui
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China.
authors.forename: Ning
authors.initials: N
authors.lastname: Sui
authors.affiliation: Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China.
authors.forename: Yanting
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China.
authors.forename: Xiaochun
authors.initials: X
authors.lastname: Chi
authors.affiliation: Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China.
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China.
authors.forename: Wenyu
authors.initials: W
authors.lastname: Ji
authors.affiliation: Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China.
authors.forename: Lu
authors.initials: L
authors.lastname: Zou
authors.affiliation: Femtosecond Laser Laboratory, Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics, Jilin University, Changchun 130012, P. R. China.
authors.forename: Hanzhuang
authors.initials: H
authors.lastname: Zhang