期刊
MICROELECTRONIC ENGINEERING
卷 66, 期 1-4, 页码 53-58出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/S0167-9317(03)00024-8
关键词
CdS; nanocrystals; photoluminescence; polyethylene glycol; quantum dot
We prepared novel CdS nanocrystal by colloid technique; CdS nanocrystal possessing polyethylene glycol tethered chains (PEG-TC) on the surface. A relatively sharp optical absorption peak was observed at around 3.4 eV. The size of the nanocrystal was estimated by the peak energy to be 4-5 nm in diameter. A very broad photoluminescence (PL) peak centered at 2.4 eV was observed when excited at 3.8 eV. The PL spectra excited at lower photon energy indicates that the PL peak is composed of 2.5, 2.3 and 1.7-1.8 eV peaks. When we excited the specimen below 2.7 eV, PL spectra of colloid solution and cast film of PEG-TC CdS was very different. The difference in the recombination processes between PEG-TC US ensemble and isolated PEG-TC US is discussed in the present paper. (C) 2003 Elsevier Science B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据