ELECTRON TRANSPORT AND EMISSION PROPERTIES OF DIAMOND
ELECTRON TRANSPORT AND EMISSION PROPERTIES OF DIAMOND
复制标题
金刚石的电子传输和发射特性
DOI：
10.1116/1.581210
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发表时间：
1998
影响因子：
3.6
通讯作者：
R. Abrams
中科院分区：
文献类型：
--
作者：
J. Yater;A. Shih;R. Abrams
用二次电子发射谱研究了氢化和铯化单晶和化学气相沉积（CVD）金刚石的电子输运和发射特性。相对于在光谱中识别的导带最小值Ec测量电子的动能和表面能垒的高度。在从氢化和铯化金刚石表面测量的光谱中，电子发射出现在能量E<Ec处，这给出了负电子亲和力的直接证据。从铯化的样品中观察到最强的发射，其产生非常高的产率（在Eb=2900 eV处δmax为80-130）。除了铯化CVD金刚石样品的情况之外，来自所有三个样品的能量分布在Ec以上的0.50-0.65 eV处尖锐地达到峰值，并且在半峰处具有0.55-0.75 eV的全宽。从铯化CVD金刚石测量的能量分布在较低能量处达到峰值，并且由于较低的发射起始能量而宽得多。一个emi...
The electron transport and emission properties of hydrogenated and cesiated single-crystal and chemical-vapor-deposited (CVD) diamond are investigated using secondary electron emission spectroscopy. The kinetic energy of the electrons and the height of the surface energy barrier are measured relative to the conduction band minimum, Ec, which is identified in the spectra. In spectra measured from hydrogenated and cesiated diamond surfaces, electron emission appears at energies E<Ec which gives direct evidence of a negative electron affinity. The strongest emission is observed from cesiated samples, which produced very high yields (δmax∼80–130 at Eb=2900 eV). The energy distributions from all three samples are sharply peaked at ∼0.50–0.65 eV above Ec and have a full width at half maximum ∼0.55–0.75 eV, except in the case of the cesiated CVD diamond samples. The energy distributions measured from cesiated CVD diamond are peaked at lower energy and are much broader due to lower emission-onset energies. An emi...