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

The temperature dependence of the photoluminescence (PL) from MnS/ZnS core-shell quantum dots is investigated in a temperature range of 8 K-300 K. The orange emission from the super(4)T sub(1) arrow right super(6)A sub(1) transition of Mn super(2+) ions and the blue emission related to the trapped s...

Full description

Saved in:
Bibliographic Details
Published inChinese physics B Vol. 23; no. 12; pp. 127804 - 1-127804-5
Main Authors Fang, Dai-Feng, Ding, Xing, Dai, Ru-Cheng, Zhao, Zhi, Wang, Zhong-Ping, Zhang, Zeng-Ming
Format Journal Article
LanguageEnglish
Published 01.12.2014
Subjects
Emission
Emission analysis
Emissions control
Photoluminescence
Quantum dots
Temperature dependence
Wavelengths
Zinc sulfides
Online AccessGet full text

Cover

More Information
Summary:The temperature dependence of the photoluminescence (PL) from MnS/ZnS core-shell quantum dots is investigated in a temperature range of 8 K-300 K. The orange emission from the super(4)T sub(1) arrow right super(6)A sub(1) transition of Mn super(2+) ions and the blue emission related to the trapped surface state are observed in the MnS/ZnS 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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
1741-4199
DOI:10.1088/1674-1056/23/12/127804