Is the Barrier Height of Exciton Self-Trapping Evaluated so far Correct? : quantum Mechanical Reevaluation
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概要
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The barrier height Eg for self-trapping (ST) has been evaluated so far byanalyzing the data on thermal quenching of free-exciton luminescence with theuse of the classical formula (ccexp [ - E./k.Tj) of the ST rate even at temperatureT considerably lower than the Debye one. The rate of multiphonon nonradiativetransition such as the ST rate cannot be described by the classical formula atsuch low temperatures. Analysis of the data of Rbl below 30 K with the quantummechanical formula gives f.:38-39 meV much larger than 17-IS meV ob-tained so far. The analysis shows simultaneously that concerning n= I free excitonsST into a state of one-center type determines the rate in Rbl while in Kl it isovercome by ST into a state of two-center type with increasing temperature. Thisenables us to predict that the so called E. luminescence should be emitted from astill unknown self-trapped state of one-center type.
- 社団法人日本物理学会の論文
- 1984-10-15
著者
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Sumi Hitoshi
Institute of Materials Science, Univ. of Tsukuba
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Sumi Hitoshi
Instiute Of Materials Science University Of Tsukuba
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Sumi Hitoshi
Institute Of Materials Science University Of Tsukuba
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- Is the Barrier Height of Exciton Self-Trapping Evaluated so far Correct? : quantum Mechanical Reevaluation
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