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[求助]
请介绍一下luminescence和Photoluminescence的区别,现在好多文献都测后者。
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| luminescence和Photoluminescence我看文献中写法也都差不多,希望大家介绍下。 |
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2楼2012-10-15 13:23:13
jy01230131
铜虫 (小有名气)
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luminescence译为发光,在物理上发光分为很多种,如电致发光electroluminescence(EL),光致发光photoluminenscence(PL),阴极射线发光cathodeluminenscence(CL) 等。 其中PL、CL又广泛运用于固体物理测试中,是一种材料测试的方法,半导体领域常用该方法考擦材料所含的杂质、缺陷等。 以下是来自wikipedia 对PL的简要解释: Photoluminescence (abbreviated as PL) is a process in which a substance absorbs photons (electromagnetic radiation) and then re-radiates photons. Quantum mechanically, this can be described as an excitation to a higher energy state and then a return to a lower energy state accompanied by the emission of a photon. This is one of many forms of luminescence (light emission) and is distinguished by photoexcitation (excitation by photons), hence the prefix photo-.[1] The period between absorption and emission is typically extremely short, in the order of 10 nanoseconds. Under special circumstances, however, this period can be extended into minutes or hours. 相关链接: http://en.wikipedia.org/wiki/Photoluminescence |
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