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Measuring the electron affinity of organic solids: an indispensable new tool for organic electronics.

机译:测量有机固体的电子亲和力:有机电子学必不可少的新工具。

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摘要

Electron affinity is a fundamental energy parameter of materials. In organic semiconductors, the electron affinity is closely related to electron conduction. It is not only important to understand fundamental electronic processes in organic solids, but it is also indispensable for research and development of organic semiconductor devices such as organic light-emitting diodes and organic photovoltaic cells. However, there has been no experimental technique for examining the electron affinity of organic materials that meets the requirements of such research. Recently, a new method, called low-energy inverse-photoemission spectroscopy, has been developed. A beam of low-energy electrons is focused onto the sample surface, and photons emitted owing to the radiative transition to unoccupied states are then detected. From the onset of the spectral intensity, the electron affinity is determined within an uncertainty of 0.1 eV. Unlike in conventional inverse-photoemission spectroscopy, sample damage is negligible and the resolution is improved by a factor of 2. The principle of the method and several applications are reported.
机译:电子亲和力是材料的基本能量参数。在有机半导体中,电子亲和力与电子传导密切相关。理解有机固体中的基本电子过程不仅很重要,而且对于有机半导体器件(如有机发光二极管和有机光伏电池)的研究和开发也是必不可少的。但是,还没有实验方法可以检验满足这种研究要求的有机材料的电子亲和力。近来,已经开发了一种称为低能量逆光发射光谱的新方法。一束低能电子聚焦在样品表面上,然后检测由于辐射跃迁到未占据状态而发射的光子。从光谱强度的开始,在0.1 eV的不确定度内确定电子亲和力。与传统的反向光发射光谱法不同,样品的损坏可以忽略不计,并且分辨率提高了2倍。报道了该方法的原理和几种应用。

著录项

  • 作者

    Yoshida Hiroyuki;

  • 作者单位
  • 年度 2014
  • 总页数
  • 原文格式 PDF
  • 正文语种 eng
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