%0 Journal Article
%T OPTICAL PROPERTIES OF COLLOIDAL CdSe TETRAPOD NANOCRYSTALS<br>CdSe四脚状纳米颗粒的光学性质
%A ZHAO Li-Juan
%A Pang Qi
%A YANG Shi-He
%A GE Wei-Kun
%A WANG Jian-Nong
%A <br>赵莉娟
%A 庞起
%A 杨世和
%A 葛惟昆
%A 王建农
%J 红外与毫米波学报
%D 2010
%I Science Press
%X Time resolved optical properties of CdSe tetrapod nanocrystals where studied. The results show that the decays of photoluminescence (PL) intensities for tetrapods in solution and on insulating silicon substrate can be well fitted by a bi-exponential function. Based on the emission-energy dependence of carrier lifetimes, the fast and slow PL decays of CdSe tetrapods are attributed to the recombination of delocalized carriers and the localized carriers in the localized states, respectively. By comparing the amplitude ratio of the fast-decay component to the slow-decay component for samples in solution with those on silicon, it is concluded that the slow PL decay is associated with the recombination of localized carriers in the surface defects of CdSe tetrapods.
%K tetrapod nanoparticle
%K decay of photoluminescence
%K localized carrier
%K surface defect<br>四脚状纳米颗粒
%K PL衰减
%K 局域载流子
%K 表面缺陷
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=D3B4F771D1A06062008B4D0A2EF05996&aid=80E4C15CA9432DD83AD35E3494FF5E46&yid=140ECF96957D60B2&vid=771469D9D58C34FF&iid=38B194292C032A66&sid=ED01F5AE50BE09C0&eid=73579BC9CFB2D787&journal_id=1001-9014&journal_name=红外与毫米波学报&referenced_num=0&reference_num=0