%0 Journal Article
%T The role of magnetic fields on organic light-emitting devices based on aluminum tris(8-hydroxyquinoline) (Alq3) at room temperature<br>室温下磁场对基于Alq3的有机电致发光器件的影响
%A Jiang Wen-Long
%A Cong Lin
%A Meng Zhao-Hui
%A Wang Jin
%A Han Qiang
%A Meng Fan-Chao
%A Wang Li-Zhong
%A Ding Gui-Ying
%A Zhang Gang
%A <br>姜文龙
%A 丛林
%A 孟昭晖
%A 汪津
%A 韩强
%A 孟凡超
%A 王立忠
%A 丁桂英
%A 张刚
%J 物理学报
%D 2010
%I 
%X We report the magnetic-field effect (MFE) in Alq3 based organic light-emitting device (OLED) with the structure of ITO/NPB/LiF/Alq3/LiF/Al.When an external magnetic field of 50 mT and insertion of LiF thickness of 0.8 nm is applied, the current efficiency and the brightness of the device increase to 12.4% and 17%, respectively.The origin of the improvements could be attributed to the Zeeman effect,which reduces the hyperfine interactions of electrons and holes, inhibiting energy transfer from the singlet polaron pairs to triplet polaron pairs and increasing the population of singlets.Similar MFE was observed in phosphorescent organic light-emitting diodes(PhOLEDs).The current efficiency of ITO/NPB/LiF(0.8 nm)/CBP:6 wt% Ir(ppy)3/BCP/Alq3/LiF/Al increases to 12.1% at 50 mT.Magnetic-field-induced increase of singlet excitons in the CBP matrix reflects increase of triplet excitons in the dispersed Ir(ppy)3 molecules in the CBP+Ir(ppy)3 blend.
%K The role of magnetic fields on organic light-emitting devices based on aluminum tris(8-hydroxyquinoline) (Alq3) at room temperature<br>有机发光，
%K 磁场，
%K 效率，
%K 磁致亮度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=6A95BC18035C7D7F417FD9BD71405DFD&yid=140ECF96957D60B2&vid=6AC2A205FBB0EF23&iid=94C357A881DFC066&sid=96BCC19F2C540E8A&eid=D48C033FA60748C1&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=25