Direct Determination of Energy Level Alignment and Charge Transport at Metal-Alq3 Interfaces via Ballistic-Electron-Emission Spectroscopy

被引：32

作者：

Jiang, J. S. ^{[1
]}

Pearson, J. E. ^{[1
]}

Bader, S. D. ^{[1
]}

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 15期

关键词：

LIGHT-EMITTING DEVICES; DIODES; METAL; SPIN; ELECTROLUMINESCENCE; SPINTRONICS; MICROSCOPY; INJECTION; FILMS;

D O I：

10.1103/PhysRevLett.106.156807

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using ballistic-electron-emission spectroscopy (BEES), we directly determined the energy barrier for electron injection at clean interfaces of Alq(3) with Al and Fe to be 2.1 and 2.2 eV, respectively. We quantitatively modeled the sub-barrier BEES spectra with an accumulated space charge layer, and found that the transport of nonballistic electrons is consistent with random hopping over the injection barrier.

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页数：4

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