Photoelectric emission from the negative electron affinity (100) diamond surface-exciton effects

被引：40

作者：

Bandis, C ^{[1
]}

Pate, BB ^{[1
]}

机构：

[1] WASHINGTON STATE UNIV,DEPT PHYS,PULLMAN,WA 99164

来源：

SURFACE SCIENCE | 1996年 / 350卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

diamond; excitons; low index single crystal surfaces; photoelectron emission; surface electronic phenomena; visible and ultraviolet photoelectron spectroscopy;

D O I：

10.1016/0039-6028(95)01107-2

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Investigation of the photoelectric yield characteristics of the negative electron affinity NEA (100) diamond surface (produced by hydrogen plasma exposure) finds a striking similarity to the emission from NEA (111) diamond surfaces. Work on NEA diamond (111) surfaces has revealed the important role (sometimes dominant) of photoexcited excitons in the photoelectric yield. Comparison of the electron emission properties among surfaces with different crystallographic orientations can give further insight into electron emission mechanisms. We find that the kinetic energy distribution, the photon energy dependence of photoelectric yield, and the photon energy dependence of constant final state measurements of NEA (100) diamond are characteristically similar to the emission from NEA (111) diamond surfaces. Observed differences appear related to the change in band bending at the surface.

引用

页码：315 / 321

页数：7

共 36 条

[11] DIAMOND FILM SEMICONDUCTORS [J].