How defects influence the photoluminescence of TMDCs  

作　　者：Mengfan Zhou Wenhui Wang Junpeng Lu Zhenhua Ni 

机构地区：[1]School of Physics and Key Laboratory of MEMS of the Ministry of Education,Southeast University,Nanjing 211189,China

出　　处：《Nano Research》2021年第1期29-39,共11页纳米研究（英文版）

基　　金：the National Key R&D Program of China(Nos.2017YFA 0205700,2019YFA 0308000);the National Natural Science Foundation of China(NSFC)(Nos.61774034,91963130,11704068,61705106);Jiangsu Natural Science Foundation(No.BK20170694).The project is supported by"the Fundamental Research Funds for the Central Universities"。

摘　　要：Two-dimensional(2D)transition metal dichalcogenide(TMDC)monolayers,a class of ultrathin materials with a direct bandgap and high exciton binding energies,provide an ideal platform to study the photoluminescence(PL)of light-emitting devices.Atomically thin TMDCs usually contain various defects,which enrich the lattice structure and give rise to many intriguing properties.As the influences of defects can be either detrimental or beneficial,a comprehensive understanding of the internal mechanisms underlying defect behaviour is required for PL tailoring.Herein,recent advances in the defect influences on PL emission are summarized and discussed.Fundamental mechanisms are the focus of this review,such as radiative/nonradiative recombination kinetics and band structure modification.Both challenges and opportunities are present in the field of defect manipulation,and the exploration of mechanisms is expected tofacilitate the applications of 2D TMDCs in the future.

关 键 词：two-dimensional material transition metal dichalcogenides(TMDCs) photoluminescence(PL) DEFECT defect engineering quantum yield(QY) 

分 类 号：TB33[一般工业技术—材料科学与工程]