The influence of selenization temperatures on the structural and optical properties of Cu (In, Al) Se2 thin films
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Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University,Laboratory for Microstructures, Shanghai University,Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University; Department of Electrical Engineering, Suihua University,Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University,Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University,Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University,Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University,Key Laboratory of Polar Materials and Devices, Ministry of Education, Department of Electronic Engineering, East China Normal University

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    Abstract:

    Cu(In, Al)Se2 (CIAS) thin films have been obtained by rapid thermal processing selenization of magnetron sputtering Cu-In-Al precursor thin films. The influence of selenization temperatures on the structural and optical properties of CIAS thin films has been investigated. The result reveals that the crystal structure of CIAS thin films depends on selenization temperature and the band gap energy has a red shift with the increase of selenization temperature. It is noted that the optimum selenization temperature of the CIAS thin films is 540℃, and it has a pure chalcopyrite structure with a band gap energy of 1.34 eV, which corresponding to the band gap energy of the theoretical maximum efficiency of solar cell absorber layer materials.

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CAO Hui-Yi, DENG Hong-Mei, CUI Jin-Yu, MENG Xian-Kuan, ZHNAG Jun, SUN Lin, YANG Ping-Xiong, CHU Jun-Hao. The influence of selenization temperatures on the structural and optical properties of Cu (In, Al) Se2 thin films[J]. Journal of Infrared and Millimeter Waves,2015,34(6):726~730

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History
  • Received:November 10,2014
  • Revised:September 23,2015
  • Adopted:January 23,2015
  • Online: December 01,2015
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