Investigation of the magnetic field effects on electron mobility in tri-(8-hydroxyquinoline)-aluminum based light-emitting devices

被引：17

作者：

Peng, Qiming ^{[1
]}

Sun, Jixiang ^{[1
]}

Li, Xianjie ^{[1
]}

Li, Mingliang ^{[1
]}

Li, Feng ^{[1
]}

机构：

[1] Jilin Univ, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2011年 / 99卷 / 03期

基金：

中国国家自然科学基金;

关键词：

MAGNETORESISTANCE;

D O I：

10.1063/1.3615305

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We investigated the magnetic field effects (MFEs) on electron mobility in tri-(8-hydroxyquinoline)-aluminum based light-emitting devices by the transient electroluminescence (EL) method upon application of various offset voltages (V-offset). It is found that the rising edges of the EL overlap closely but the falling edges are separated by the magnetic field both when V-offset=0 V and V-offset>V-turnon. The results suggest the bipolaron model and the triplet-polaron interaction model related to the carriers' mobility are not the dominant mechanisms for explaining the MFEs under our experimental conditions, and the external magnetic field is confirmed to affect the carriers' recombination process. (C) 2011 American Institute of Physics. [doi:10.1063/1.3615305]

引用

页数：3

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