CdZnTe(CZT)体单晶的Raman-PL光谱的再分析

Analysis Again of Raman-PL Spectroscopy of Single Crystal CdZnTe

本文对碲锌镉 (CZT) (111)取向的 Raman光谱和 PL 光谱作了分析。在 Raman光谱中 ,用 Stokes测量检测无峰 ,而反斯托克斯 (anti- Stokes)测出了它的 Raman光谱 ,其中在 - 12 5 cm- 1 处是横声子振动(TO) ,- 142 cm- 1处是纵声子振动 (L O)。由于晶体的各向异性 ,在一个平面上 ,同一晶粒旋转不同方向TO/L O比值与 (111)平面等能面截面图相符。另它的 PL光谱在 80 7nm(1.5 35 e V) ,FWH M为 30 nm(0 .0 5 7e V) ,旋转方向对 PL光谱无影响。故在生长 Hg Cd Te单晶薄膜时 ,要注意衬底

The paper analyze Raman and photoluminescence spectroscopy to CdZnTe(111) annealing.The firstly,in Raman,we measures CZT's Raman spectra in anti Stokes.One of spectra peak is transverse optical phonon (TO) at -125 cm -1 ,the another is longitudinal optical phonon (LO) at -142 cm -1 .The secondly,after same crystal was circumvolved,the LO/TO ratio is equal (111) isometric line.The third,its PL spectra of peak is at 807 nm (1.535 eV) and FWHM is 30 nm (0.057 eV).Circumvolved direction not change to PL spectra.Therefore,we need notice situation of crystal plane of CZT subtract,when HgCdTe single crystallinity film was grown.