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Effect of sputtering time processes on phase transformation, optical and photoelectrical properties of CuInSe2 film solar cells

XIN JI1,* , LIN JUN WANG1, JIAN YONG TENG1, YI MING MI2, CHAO MIN ZHANG2

Affiliation

  1. School of Materials Science & Engineering, Shanghai University, Shanghai 200444, China
  2. College of Fundamental Studies, Shanghai University of Engineering Science, Shanghai 201620, China

Abstract

Sputtering deposited CuInSe 2 films are of potential important as absorber material in thin film solar cells as long as we c an optimize the sputtering time processes to enhance their photoelectr ical properties . The results show that long t ime sputter ing processes exceeding to 3.0h can produce the particle aggregation and clusters to enhance the conversion efficiency of CuInSe CuInSe2 solar cells. Long t ime sputter ing processes ( 2.5, 3.0 and 4 .0h ) are found to be vital for the transformation from the InxSe phase to In 2 Se 3 and InSe structures. In addition, t he optical absorbance result show that the optical absorbance of CIS film at 4.0 h i s high er than the other films in the wavelength region above 3 00 nm . Also, the l ong t ime sputter ing processes (3.0 and can cause a significant increase in the optical band gap close to the best absorbed band gap of sunlight Finally, the I V chara cteristic curves show that the photoelectric conversion efficienc y of CIS film batter ies increase from 1.14% to 5.56% and short circuit current density increase from 12.63 to 22.26mA/cm2 with the sputtering time increase from 1.0 to 4.0h ..

Keywords

CuInSe2 film, Sputtering times, Vapor deposition, Phase transitions, Optical properties, Photoelectrical properties.

Submitted at: Sept. 28, 2015
Accepted at: Oct. 28, 2015

Citation

XIN JI, LIN JUN WANG, JIAN YONG TENG, YI MING MI, CHAO MIN ZHANG, Effect of sputtering time processes on phase transformation, optical and photoelectrical properties of CuInSe2 film solar cells, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 11-12, pp. 1710-1715 (2015)