Temperature dependence of the photoluminescence of MnS/ZnS core–shell quantum dots  

作　　者：房岱峰 丁星 代如成 赵智 王中平 张增明 

机构地区：[1]Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics,University of Science and Technology of China [2]Physics Department, Anhui University [3]Center of Physical Experiments, University of Science and Technology of China

出　　处：《Chinese Physics B》2014年第12期486-490,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11304300,21002097,11074232,and 11274288);the National Basic Research Program of China(Grant Nos.2011CB932801 and 2012CB933702);the Fund from the Ministry of Education of China(Grant No.20123402110034);the Fundamental Research Funds for the Central Universities(Grant No.WK2030420002);the Anhui Provincial Natural Science Foundation,China(Grant No.1308085QA06)

摘　　要：The temperature dependence of the photoluminescence（PL） from Mn S/Zn S core–shell quantum dots is investigated in a temperature range of 8 K–300 K. The orange emission from the ^4T1→^6A1transition of Mn^2＋ions and the blue emission related to the trapped surface state are observed in the Mn S/Zn S core–shell quantum dots. As the temperature increases, the orange emission is shifted toward a shorter wavelength while the blue emission is shifted towards the longer wavelength. Both the orange and blue emissions reduce their intensities with the increase of temperature but the blue emission is quenched faster. The temperature-dependent luminescence intensities of the two emissions are well explained by the thermal quenching theory.The temperature dependence of the photoluminescence（PL） from Mn S/Zn S core–shell quantum dots is investigated in a temperature range of 8 K–300 K. The orange emission from the ^4T1→^6A1transition of Mn^2＋ions and the blue emission related to the trapped surface state are observed in the Mn S/Zn S core–shell quantum dots. As the temperature increases, the orange emission is shifted toward a shorter wavelength while the blue emission is shifted towards the longer wavelength. Both the orange and blue emissions reduce their intensities with the increase of temperature but the blue emission is quenched faster. The temperature-dependent luminescence intensities of the two emissions are well explained by the thermal quenching theory.

关 键 词：Mn S/Zn S quantum dots temperature PHOTOLUMINESCENCE 

分 类 号：O471.1[理学—半导体物理] O482.31[理学—物理]