中国物理B ›› 2014, Vol. 23 ›› Issue (11): 117804-117804.doi: 10.1088/1674-1056/23/11/117804

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Fabrication and temperature-dependent photoluminescence spectra of Zn-Cu-In-S quaternary nanocrystals

刘晓娟, 张晓松, 李岚, 王雪亮, 苑琳琳   

  1. Institute of Material Physics, Tianjin University of Technology, Tianjin 300384, China
  • 收稿日期:2014-03-21 修回日期:2014-05-09 出版日期:2014-11-15 发布日期:2014-11-15
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grand Nos. 60907021, 60977035, and 60877029) and the Natural Science Foundation of Tianjin, China (Grant No. 11JCYBJC00300).

Fabrication and temperature-dependent photoluminescence spectra of Zn-Cu-In-S quaternary nanocrystals

Liu Xiao-Juan (刘晓娟), Zhang Xiao-Song (张晓松), Li Lan (李岚), Wang Xue-Liang (王雪亮), Yuan Lin-Lin (苑琳琳)   

  1. Institute of Material Physics, Tianjin University of Technology, Tianjin 300384, China
  • Received:2014-03-21 Revised:2014-05-09 Online:2014-11-15 Published:2014-11-15
  • Contact: Zhang Xiao-Song E-mail:zhangxiaosong022@126.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grand Nos. 60907021, 60977035, and 60877029) and the Natural Science Foundation of Tianjin, China (Grant No. 11JCYBJC00300).

摘要:

A series of Zn-Cu-In-S nanocrystals (ZCIS NCs) are prepared and the optical properties of the ZCIS NCs are tuned by adjusting the reaction time. It is interesting to observe that the temperature-dependent photoluminescence (PL) spectra of the ZCIS NCs show a redshift with decreasing intensity at low temperature (50-280 K) and a blueshift at high temperature (318-403 K). The blueshift can be explained by the thermally active phonon-assisted tunneling from the excited states of the low-energy emission band to the excited states of the high-energy emission band.

关键词: temperature-dependent photoluminescence, photoluminescence lifetime, quaternary nanocrystals, white light emitting device

Abstract:

A series of Zn-Cu-In-S nanocrystals (ZCIS NCs) are prepared and the optical properties of the ZCIS NCs are tuned by adjusting the reaction time. It is interesting to observe that the temperature-dependent photoluminescence (PL) spectra of the ZCIS NCs show a redshift with decreasing intensity at low temperature (50-280 K) and a blueshift at high temperature (318-403 K). The blueshift can be explained by the thermally active phonon-assisted tunneling from the excited states of the low-energy emission band to the excited states of the high-energy emission band.

Key words: temperature-dependent photoluminescence, photoluminescence lifetime, quaternary nanocrystals, white light emitting device

中图分类号:  (Nanocrystals, nanoparticles, and nanoclusters)

  • 78.67.Bf
78.55.-m (Photoluminescence, properties and materials) 78.40.-q (Absorption and reflection spectra: visible and ultraviolet) 78.40.Fy (Semiconductors)