Optoelectronic and photocatalytic properties of I–III–VI QDs: Bridging between traditional and emerging new QDs  

作　　者：Yanhong Liu Fenghua Li Hui Huang Baodong Mao Yang Liu Zhenhui Kang 

机构地区：[1]Institute of Green Chemistry&Chemical Technology,School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,China [2]Institute of Functional Nano and Soft Materials(FUNSOM),Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices,Soochow University,Suzhou 215123,China

出　　处：《Journal of Semiconductors》2020年第9期4-16,共13页半导体学报（英文版）

基　　金：the National Natural Science Foundation of China(21908081,21501072,51972216,51725204,21771132 and 52041202);the National MCF Energy R&D Program(2018YFE0306105);Innovative Research Group Project of the National Natural Science Foundation of China(51821002);the Jiangsu Specially-Appointed Professors Program,and the Natural Science Foundation of Jiangsu Province(BK20190041,BK20190828 and BK20150489).

摘　　要：Due to the quantum size effect and other unique photoelectric properties,quantum dots(QDs)have attracted tremendous interest in nanoscience,leading a lot of milestone works.Meantime,the scope and scientific connotation of QDs are constantly expanding,which demonstrated amazing development vitality.Besides the well-developed Cd-containing Ⅱ-Ⅵ semiconductors,QDs of environmentally friendly Ⅰ-Ⅲ-Ⅵ(Ⅰ=Cu,Ag;Ⅲ=Ga,In;Ⅵ=S,Se)chalcogenides have been a hot spot in the QDs family,which are different from traditional Ⅱ-Ⅵ QDs in terms of multi-composition,complex defect structure,synthetic chemistry and optical properties,bringing a series of new laws,new phenomena and new challenges.The composition of Ⅰ-Ⅲ-Ⅵ chalcogenides and their solid solutions can be adjusted within a very large range while the anion framework remains stable,giving them excellent capability of photoelectric property manipulation.The important features of Ⅰ-Ⅲ-Ⅵ QDs include wide-range bandgap tuning,large Stokes shift and long photoluminescence(PL)lifetime,which are crucial for biological,optoelectronic and energy applications.This is due to the coexistence of two or more metal cations leading to a large number of intrinsic defects within the crystal lattice also known as deep-donor-acceptor states,besides the commonly observed surface defects in all QDs.However,a profound understanding of their structure and optoelectronic properties remains a huge challenge with many key issues unclear.On one hand,the achievements and experience of traditional QD research are expected to provide vital value for further development of Ⅰ-Ⅲ-Ⅵ QDs.On the other hand,the understanding of the emerging new QDs,such as carbon and other 2D materials,are even more challenging because of the dramatically different composition and structure from Ⅱ-Ⅵ semiconductors.For this,Ⅰ-Ⅲ-Ⅵ QDs,as a close relative to Ⅱ-Ⅵ QDs but with much more complex composition and structure variation,provide a great opportunity as a gradual bridge to make up t

关 键 词：Ⅰ–Ⅲ–Ⅵ Ⅱ–Ⅵ quantum dots carbon dots optical properties PHOTOCATALYSIS 

分 类 号：O471.1[理学—半导体物理]