A Study on the Electrical and Optical Properties of CdS Thin Films Deposited with Different Conditions for Solar Cell Applications

태양전지용 CdS 박막의 제조 조건에 따른 전기적 광학적 특성에 관한 연구

  • 이재형 (군산대학교 전자정보공학부)
  • Published : 2008.07.01


Cadmium sulphide (CdS) thin film, which is used as a window layer of heterojunction solar cell, on the glass substrate was deposited by vacuum evaporation. Effects of deposition conditions such as the source and substrate temperature on electrical and optical properties of CdS films was investigated. As the source temperature was increased, the deposition rate of CdS films was increased. In addition, the optical transmittance and the electrical resistivity of CdS films were decreased as the source temperature was increased. This results were attributed to the increase of excess Cd amount in the film. The crystal structure of CdS films exhibited the hexagonal phase with preferential orientation of the (002) plane. As the substrate temperature was increased, the crystal structure of CdS films was improved and the resistivity of the films was increased due to the decrease of excess Cd in film.


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