Recent progress in the fields of tuning the band gap of quantum dots  

作　　者：LEI Da SHEN YongTao FENG YiYu FENG Wei 

机构地区：[1]School of Materials Science and Engineering,Tianjin University,Tianjin 300072,China

出　　处：《Science China(Technological Sciences)》2012年第4期903-912,共10页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 51073115, 51003072, 51173127, 51011140072);the National Basic Research Program of China ("973" Program) (Grant No. 2010CB934700);the Natural Science Foundation of Tianjin City (Grant No. 10JCZDJC22400)

摘　　要：Band gap, which can be tuned by changing the size of quantum dots (QDs) based on the quantum confinement effect, plays a fundamental role in electrical and optical properties of QDs. However, the tuning of the band gap by changing the size results in a series of intrinsic problems, such as the instability of the extremely small QDs, negative combination with biomolecules because of the large size of QDs, etc. Recently, several new methods have been developed to further study and improve the tuning of the band gap. In this paper, we summarized the recent progress in the fields of tuning the band gap of QDs, including alloyed QDs, core-shell QDs and doped QDs. The review has also prospected the development trend of tuning the band gap as well as their applications.

关 键 词：quantum dots band gap PHOTOLUMINESCENCE ALLOYING CORE-SHELL DOPING 

分 类 号：O471.1[理学—半导体物理] O734[理学—物理]