The effect of substrate temperature on the Characteristics of CdTe thin film

기판온도에 따른 CdTe박막 특성

In this paper, structual, optical and electrical properties of CdTe thin films prepared by electron beam evaporation method were studied. The crystal structure of CdTe films deposited at substrate temperature of $100{\sim}400^{\circ}C$ was zincblend type with preferential orientation of the (111)plane parallel to the substrate. The result of optical absoption and transmittance show that solar radiation with energy larger than band gap is almost completely absorbed within an about $2{\mu}m$ thickness of the evaporated CdTe layer and optical band gap of the CdTe film was larger with increasing substrate temperature. The resistivity of CdTe films deposited on the glass substrate was about $10^5{\sim}10^7{\Omega}cm$.