%0 Journal Article
%T Improving Efficiency by Doping PtOEP into Spiro Light-Emitting Devices<br>利用PtOEP掺杂改善Spiro发光器件的发光效率
%A Zhao Junqing
%A Qiao Shizhu
%A Xu Fuyun
%A Zhang Ningyu
%A Pang Yantao
%A Chen Ying
%A <br>赵俊卿
%A 乔士柱
%A 许福运
%A 张宁玉
%A 庞岩涛
%A 陈莹
%J 半导体学报
%D 2008
%I 
%X To investigate effective means of improving the efficiency of organic light-emitting devices (OLEDs) by making full use of triplet emission,a phosphorescent material Pt (II) Octaethylporphine (PtOEP) is doped into polymer host polyspirobifluorene (Spiro) to allow radiative recombination of triplet excitons.The current and brightness characteristics of the devices are tested and the electroluminescent spectra are described.Both fluorescence and phosphorescence are observed,and an obvious increase in external quantum efficiency is realized compared to undoped devices when different phosphorescent dopant concentrations are tried.Thus,the phosphorescent emission from triplet excited states might be an effective way to increase the efficiency of OLEDs when the concentration of the phosphorescent dopant is properly controlled.
%K external quantum efficiency
%K triplet
%K organic light-emitting device<br>外量子效率
%K 三线态
%K 有机发光器件
%K external
%K quantum
%K efficiency
%K triplet
%K organic
%K light-emitting
%K device
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=025C8057C4D37C4BA0041DC7DE7C758F&aid=E2502D6882F77D4BDAA38769C017EAC2&yid=67289AFF6305E306&vid=771469D9D58C34FF&iid=38B194292C032A66&sid=6B3068A7C27BD349&eid=B941678158018439&journal_id=1674-4926&journal_name=半导体学报&referenced_num=0&reference_num=18