Electronic Structure of Bathocuproine on Metal Studied by Ultraviolet Photoemission Spectroscopy

Susumu Toyoshima; Kazuhisa Kuwabara; Takeaki Sakurai; Tetsuya Taima; Kazuhiro Saito; Hiroo Kato; Katsuhiro Akimoto

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Electronic Structure of Bathocuproine on Metal Studied by Ultraviolet Photoemission Spectroscopy

机译：紫外光发射光谱法研究金属上铜盐铜的电子结构

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The electronic structure at the interface between bathocuproine (BCP) and a metal was studied by ultraviolet photoemission spectroscopy (UPS). For Ag, Al, Mg, and Ca, interface states were observed near the Fermi level. On the other hand, no interface states were observed for Au. The intensities of the interface states increase with decreasing metal work function. It is suggested that the interface states play an important role in electron transport at the interface. It was found that the energy difference between the BCP vacuum level and the metal Fermi level is almost constant. This phenomenon is similar to the Schottky barrier pinning observed at a metal/semiconductor interface. The cause of this phenomenon is discussed.

机译：通过紫外光发射光谱法（UPS）研究了浴铜蛋白（BCP）和金属之间的界面上的电子结构。对于Ag，Al，Mg和Ca，在费米能级附近观察到界面态。另一方面，未观察到Au的界面状态。界面态的强度随着金属功函数的减小而增加。建议界面态在界面处的电子传输中起重要作用。发现BCP真空能级和金属费米能级之间的能量差几乎是恒定的。这种现象类似于在金属/半导体界面处观察到的肖特基势垒钉扎。讨论了这种现象的原因。

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来源
《Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers》 |2007年第4b期|p.2692-2695|共4页
作者
Susumu Toyoshima; Kazuhisa Kuwabara; Takeaki Sakurai; Tetsuya Taima; Kazuhiro Saito; Hiroo Kato; Katsuhiro Akimoto;
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作者单位

Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan;

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原文格式 PDF
正文语种 eng
中图分类应用物理学;
关键词
bathocuproine; interface state; ultraviolet photoemission spectroscopy; work function; organic light-emitting diode; organic solar cell; buffer layer;

机译：浴铜素;界面态;紫外光发射光谱;功函数;有机发光二极管;有机太阳能电池;缓冲层;

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Electronic Structure of Bathocuproine on Metal Studied by Ultraviolet Photoemission Spectroscopy

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