Magnetic field-effects in bipolar, almost hole-only and almost electron-only tris-(8-hydroxyquinoline) aluminum devices

被引：92

作者：

Nguyen, T. D. ^{[1
]}

Sheng, Y.

Rybicki, J.

Wohlgenannt, M.

机构：

[1] Univ Iowa, Dept Phys & Astron, Iowa City, IA 52242 USA

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.77.235209

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present magnetoconductivity and magnetoluminescence measurements in sandwich devices made from the pi-conjugated molecule tris-(8-hydroxyquinoline) aluminum (Alq(3)) and demonstrate effects of more than 25% and 50% magnitude, respectively. These effects are known to be caused by hyperfine coupling in pairs of paramagnetic species, and it is often assumed that these are electron-hole pairs. However, we show that the very large magnitude of the effect contradicts present knowledge of the electron-hole pair recombination processes in electroluminescent pi-conjugated molecules and that the effect persists even in almost hole-only devices.

引用

页数：5

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