Efficient up-conversion photoluminescence in all-inorganic lead halide perovskite nanocrystals

作     者：Andres Granados del Aguila TThu Ha Do Jun Xing Wen Jie Jee Jacob B.Khurgin Qihua Xiong Andrés Granados del (A)guila;T.Thu Ha Do;Jun Xing;Wen Jie Jee;Jacob B.Khurgin;Qihua Xiong

作者机构：Division of Physics and Applied PhysicsSchool of Physical and Mathematical SciencesNanyang Technological UniversitySingapore 637371Singapore Key Laboratory of Eco-Chemical EngineeringMinistry of EducationCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Department of Electrical and Computer EngineeringJohns Hopkins UniversityBaltimoreMaryland 21218USA State Key Laboratory of Low-Dimensional Quantum PhysicsDepartment of PhysicsTsinghua UniversityBeijing 100084China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2020年第13卷第7期

页      面：1962-1969页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：the Singapore National Research Foundation through the NRF Investigatorship Award(No.NRF-NRFI2015-03) the Singapore Ministry of Education via AcRF Tier 3 Programme(No.MOE2018-T3-1-002),Tier 2 grant(No.MOE2018-T2-2-068)and Tier 1 grants(Nos.RG103/15 and RG113/16) A.G.D.A.gratefully acknowledges the financial support of the Presidential Postdoctoral Fellowship program of the Nanyang Technological University 

主　　题：up-conversion photoluminescence phonons lead halide perovskite colloidal nanocrystals 

摘      要：Up-conversion photoluminescence(UCPL)refers to the elementary process where low-energy photons are converted into high-energy ones via consecutive interactions inside a *** additional energy is provided by intermnal thermal energy in the form of lttice vibrations(phonons),the process is called phonon-assisted ***,we report the exceptionally large phonon-assisted energy gain of up to^8kgT(kg is Boltzmann constant,T is temperature)on all-inorganic lead halide perovskite semiconductor colloidal nanocrystals that goes beyond the maximum capabilty of only harvesting optical phonon *** systematic optical study in combination with a statistical probability model,we explained the nontrivial phonon-assisted UCPL process in perovskites nanocrystals,where in addition to the strong electron-phonon(light-matter)coupling,other nonlinear processes such as phonon-phonon(matter-matter)interaction also effectively boost the up-conversion efficiency.