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[交流]
【討論】請問各位大俠:關(guān)于功函數(shù)測試有何有效辦法?請不吝賜教
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各位大俠,一般采用UPS和開爾文探針功函數(shù)測試,請問大家有沒有碰到測試結(jié)果與體材料(或一般報道結(jié)果)相差甚大? 影響功函數(shù)的一般因素有哪些?關(guān)于半導體UPS結(jié)果分析是否有深入研究文獻或理論。 各位大俠,不吝賜教,謝謝! [ Last edited by Frank18711 on 2011-4-3 at 10:07 ] |
» 搶金幣啦!回帖就可以得到:
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Many techniques have been developed based on different physical effects to measure the electronic work function of a sample. They can be classified into two groups: the absolute method and relative method. Absolute electron emission method: Photoemission Thermionic emission Field electron emission Electron tunneling (STM) Relative contact potential difference method: Kelvin probe force microscope. It is not a good method because of limited success (potential “drifting,” no absolute reference, lack of sensitivity). |
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