Size-dependent photoluminescence dynamics of CuInS2 quantum dots and charge injection on titanium oxide film
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- 作者：Yueli Liua ; Tao Chena ; Zhuoyin Penga ; Lei Wub ; Keqiang Chena ; Peng Zhoua ; Linlin Wanga ; Wen Chena ; chenw@whut.edu.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Size-dependent ; Time-resolved photoluminescence ; Low temperature photoluminescence ; CuInS2 quantum dots ; Charge injection rate
- 刊名：Journal of Alloys and Compounds
- 出版年：2016
- 出版时间：15 February 2016
- 年：2016
- 卷：658
- 期：Complete
- 页码：76-84
- 全文大小：3376 K
文摘
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CuInS2 quantum dots with different sizes are synthesized by a thermolysis process.
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PL lifetimes firstly increase then decrease with the size increasing.
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There is no emission peak shift from 5 K to 200 K for the 4.9 nm CuInS2 QDs.
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Temperature dependence of FWHM comes from the coupling of the carriers to the acoustic phonons modes.
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Larger of conduction band energy offset between QDs and TiO2 induces the PL lifetime decreasing with the size decreasing.