Temperature-dependent photoluminescence of size-tunable ZnAgInSe quaternary quantum dots

doi:10.1088/1674-1056/26/6/067804

中国物理B ›› 2017, Vol. 26 ›› Issue (6): 67804-067804.doi: 10.1088/1674-1056/26/6/067804

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

Temperature-dependent photoluminescence of size-tunable ZnAgInSe quaternary quantum dots

Qi Ding(丁琪), Xiao-Song Zhang(张晓松), Lan Li(李岚), Jian-Ping Xu(徐建萍), Ping Zhou(周平), Xiao-Fei Dong(董晓菲), Ming Yan(晏明)

1 Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin 300384, China;
2 School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, Cambridge, Massachusetts 02138, USA

收稿日期:2017-02-05 修回日期:2017-03-14 出版日期:2017-06-05 发布日期:2017-06-05
通讯作者: Xiao-Song Zhang E-mail:zhangxiaosong022@126.com
基金资助:
Project supported by the National High Technology Research and Development Program of China (Grant No. 2013AA014201), the National Key Foundation for Exploring Scientific Instrument of China (Grant No. 2014YQ120351), and the Natural Science Foundation of Tianjin (Grant No. 11JCYBJC00300, 4JCZDJC31200, 15JCYBJC16700, and 15JCYBJC16800).

Temperature-dependent photoluminescence of size-tunable ZnAgInSe quaternary quantum dots

Qi Ding(丁琪)¹, Xiao-Song Zhang(张晓松)^1,2, Lan Li(李岚)¹, Jian-Ping Xu(徐建萍)¹, Ping Zhou(周平)¹, Xiao-Fei Dong(董晓菲)¹, Ming Yan(晏明)¹

1 Institute of Material Physics, Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin University of Technology, Tianjin 300384, China;
2 School of Engineering and Applied Sciences, Harvard University, 9 Oxford Street, Cambridge, Massachusetts 02138, USA

Received:2017-02-05 Revised:2017-03-14 Online:2017-06-05 Published:2017-06-05
Contact: Xiao-Song Zhang E-mail:zhangxiaosong022@126.com
Supported by:
Project supported by the National High Technology Research and Development Program of China (Grant No. 2013AA014201), the National Key Foundation for Exploring Scientific Instrument of China (Grant No. 2014YQ120351), and the Natural Science Foundation of Tianjin (Grant No. 11JCYBJC00300, 4JCZDJC31200, 15JCYBJC16700, and 15JCYBJC16800).

摘要/Abstract

摘要： Colloidal ZnAgInSe (ZAISe) quantum dots (QDs) with different particle sizes were obtained by accommodating the reaction time. In the previous research, photoluminescence (PL) of ZAISe QDs only could be tuned by changing the composition. In this work the size-tunable photoluminescence was observed successfully. The red shift in the photoluminescence spectra was caused by the quantum confinement effect. The time-resolved photoluminescence indicated that the luminescence mechanisms of the ZAISe QDs were contributed by three recombination processes. Furthermore, the temperature-dependent PL spectra were investigated. We verified the regular change of temperature-dependent PL intensity, peak energy, and the emission linewidth of broadening for ZAISe QDs. According to these fitting data, the activation energy (ΔE) of ZAISe QDs with different nanocrystal sizes was obtained and the stability of luminescence was discussed.

关键词: quaternary quantum dots, temperature-dependent photoluminescence, photoluminescence lifetime

Abstract: Colloidal ZnAgInSe (ZAISe) quantum dots (QDs) with different particle sizes were obtained by accommodating the reaction time. In the previous research, photoluminescence (PL) of ZAISe QDs only could be tuned by changing the composition. In this work the size-tunable photoluminescence was observed successfully. The red shift in the photoluminescence spectra was caused by the quantum confinement effect. The time-resolved photoluminescence indicated that the luminescence mechanisms of the ZAISe QDs were contributed by three recombination processes. Furthermore, the temperature-dependent PL spectra were investigated. We verified the regular change of temperature-dependent PL intensity, peak energy, and the emission linewidth of broadening for ZAISe QDs. According to these fitting data, the activation energy (ΔE) of ZAISe QDs with different nanocrystal sizes was obtained and the stability of luminescence was discussed.

Key words: quaternary quantum dots, temperature-dependent photoluminescence, photoluminescence lifetime

中图分类号: (Quantum dots)

78.67.Hc

78.55.-m (Photoluminescence, properties and materials) 78.40.Fy (Semiconductors)

丁琪, 张晓松, 李岚, 徐建萍, 周平, 董晓菲, 晏明. Temperature-dependent photoluminescence of size-tunable ZnAgInSe quaternary quantum dots[J]. 中国物理B, 2017, 26(6): 67804-067804.

Qi Ding(丁琪), Xiao-Song Zhang(张晓松), Lan Li(李岚), Jian-Ping Xu(徐建萍), Ping Zhou(周平), Xiao-Fei Dong(董晓菲), Ming Yan(晏明). Temperature-dependent photoluminescence of size-tunable ZnAgInSe quaternary quantum dots[J]. Chin. Phys. B, 2017, 26(6): 67804-067804.

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Temperature-dependent photoluminescence of size-tunable ZnAgInSe quaternary quantum dots

Temperature-dependent photoluminescence of size-tunable ZnAgInSe quaternary quantum dots

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