Shell-dependent hole transport in highly luminescent CdSe-core CdS/ZnCdS/ZnS multi-shell nanocrystals

被引：7
|
作者：
Zhang, Youlin [1 ,2 ,3 ]
Kong, Xianggui [1 ]
Qu, Yuqiu [1 ,2 ,3 ]
Jing, Pengtao [1 ,2 ]
Zeng, Qinghui [1 ,2 ]
Sun, Yajuan [1 ,3 ]
Wang, Andrew Y. [4 ]
Zhao, Jialong [1 ]
Zhang, Hong [3 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Key Lab Excited State Proc, Changchun 130033, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
[3] Univ Amsterdam, Vant Hoff Inst Mol Sci, NL-1018 WV Amsterdam, Netherlands
[4] Ocean NanoTech, Fayetteville, AR 72701 USA
来源：
JOURNAL OF LUMINESCENCE | 2009年 / 129卷 / 12期
基金：
美国国家科学基金会;
关键词：
CdSe; Nanocrystals; Hole transporting material; Hole transfer; Photoluminescence lifetime; QUANTUM DOTS; SEMICONDUCTOR NANOCRYSTALS; CHARGE-TRANSFER; SPECTROSCOPY; INTERFACE; POLYMER; DEVICES;
D O I：
10.1016/j.jlumin.2009.01.036
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The photoinduced hole transfer dynamics from CdSe quantum dots (QDs), shelled with ZnS or CdS/CdZnS/ZnS layers, to organic hole transporting materials (HTMs) is investigated by absorption, steady-state and time-resolved photoluminescence (PL) spectroscopy. The PL intensity and lifetime of the QDs are dramatically quenched when HTMs are added into the dilute QD solution. The quenching efficiency of the QDs significantly decreases with increasing the shell thickness and increases with decreasing the oxidation potential of the HTMs. These facts are correlated with the photoinduced hole transfer from the QDs to the HTMs. The above results are helpful in understanding the photoexcitation dynamics-related phenomena of organic molecule conjugated nano-object. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：1410 / 1414
页数：5
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