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Ⅱ-Ⅵ족 화합물 반도체(ZnTe와 ZnSe)의 Photoacoustic Spectrum에 관한 연구
金柚培,琴彩 충남대학교 1985 忠南科學硏究誌 Vol.12 No.1
The sound generated from a periodically illuminated solid as a photoacoustic effects first discovered in 1881 is used to investigate the properties of materials. The PA spectra of ZnTe and ZnSe crystal were obtained by PAS method. The absorption spectrum of materials which is not accesible with optical spectroscopy can be obtained by PA spectroscopy. The PA signals were proportional to absorption coefficient and the energy bandgaps of ZnTe and ZnSe crystal were measured as 2.01 eV and 2.55 eV respectively. The characteristics of energy transition of ZnTe and ZnSe crystals were investigated as the direct allowed transition by PA spectroscopy.