A Study on Growth and Characterization for α-HgI2 Polycrystalline Films

• Main Authors: Chen-Tsung Shin, 施誠琮
• Other Authors: Kuan-Cheng Chiu
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/fsmec4

碩士 === 中原大學 === 應用物理研究所 === 91 === By using an oil-bath furnace growth system and by varying the temperature profile inside the furnace, α-HgI2 polycrystalline films are prepared by physical vapor deposition (PVD). The surface morphology and crystallinity for the as-grown α-HgI2 polycrystalline films are examined by SEM and XRD, and accordingly, the best growth conditions for α-HgI2 polycrystalline films in this system are found. The temperature dependence of band gap deduced from photoconductivity spectra with photon incident to the simple α-HgI2 surface and to the carbon electrode-α-HgI2 surface with different bias directions is measured. In addition, we compare the photoconductivity spectra of α-HgI2 polycrystalline films with that of α-HgI2 single crystals.