%0 Journal Article
%T Magnetoconductance in Alq3-based organic light-emitting diodes<br>基于Alq3的有机发光二极管的磁电导效应
%A Zhang Yong
%A Liu Rong
%A Lei Yan-Lian
%A Chen Ping
%A Zhang Qiao-Ming
%A Xiong Zu-Hong
%A <br>张勇
%A 刘荣
%A 雷衍连
%A 陈平
%A 张巧明
%A 熊祖洪
%J 物理学报
%D 2010
%I 
%X Organic light-emitting diode (OLED) with structure of ITO/CuPc/NPB/Alq3/LiF/Al was fabricated,and the magnetic field effect on the injection current (magnetoconductance or MC effect) at 300 K,260 K,220 K,and 180 K were measured at constant voltage bias. During the transition of injection current from bipolar current to unipolar current,the MC of the device increased firstly and fell with the decreasing current. The MC became smaller at the lower temperatures. However,under all measurement conditions,the values of the MC were always positive. The inversion of MC from positive to negative as reported in literatures was not observed. The experimental results demonstrate that the ±MC effects in OLED not only depend on the unipolar or bipolar current. It is also related with the organic materials and device structure. Using the magnetic field modulated electron-hole pair mechanism and bipolaron model,the positive MC effects in bipolar and unipolar injection current are interpreted, respectively.
%K organic light-emitting diode
%K magnetoconductance
%K bipolaron<br>有机发光二极管
%K 磁电导
%K 双极化子
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=F193C23C89DC3DE61587BD534A32C897&yid=140ECF96957D60B2&vid=6AC2A205FBB0EF23&iid=5D311CA918CA9A03&sid=EE17E26D8568963C&eid=04A3E49C0223656D&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=23