Luminescence of CuBr and Its Correlation to the Exciton

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概要

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• Luminescence and photoconductivity spectra in evaporated films or polycrystals of CuBr have been studied. Relationship between the emission and absorption spectra, leads to the conclusion that the resonance emission is due to the annihilation of an intrinsic exciton of the lowest energy. An emission line similar to I_1 in CuCl and other narrow emission lines are found. These are considered to arise from bound excitons. Equidistant structure is observed in emission spectra of some films as well as in an excitation spectrum of the resonance emission. The energy difference between the peaks in the structure is equal to the transversal optical phonon energy. On the basis of various experimental results, a radiative annihilation process of an intrinsic exciton is discussed. From the photoconductivity spectrum, the band gap energy is estimated to be 3.02eV at 8°K. The thermal activation energy for the dissociation of the lowest energy exciton is obtained as 0.10±0.02eV from the resonance emission intensity vs. 1/T curve.

• 社団法人日本物理学会の論文
• 1967-02-05

著者

• Goto Takenari

  Department Of Physics Faculty Of Science Tohoku University

• Ueta Masayasu

  Department Of Physics Faculty Of Science Tohoku University

• Ueta Masayasu

  Department Of Physics Faculity Of Science Tohoku University

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