Photoacoustic Spectroscopy in Band Edge Region of Cd_<1-x>Mn_xTe

概要

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Nonradiative recombination processes have been studied in Cd_<1-x>Mn_xTe of x=0.4 and 0.6 by highly sensitive photoacoustic spectroscopy. The photoacoustic spectrum is found to be extended deeply into the energy-band-gap region by 150-300 meV and shows a remarkable decrease of the photoacoustic intensity at 2.07 eV. The results are interpreted in terms of the nonradiative recombination process which takes place in the fluctuating band-edge region of the material, and the suppression of the nonradiative process due to the energy transfer from the band electrons to the Mn ion levels. The relationship with the photoluminescence process is also discussed.
社団法人応用物理学会の論文
1991-11-15