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Optica Publishing Group
  • Journal of the Optical Society of Korea
  • Vol. 18,
  • Issue 5,
  • pp. 429-435
  • (2014)

Ultra Broadband Absorption of SPPs Enhanced Dual Grating Thin Film CIGS Solar Cell Enabled by Particle Swarm Optimization

Open Access Open Access

Abstract

We examined the effective utilization of Particle Swarm Optimization (PSO) to enhance the light absorption performance in thin CuIn1-xGaxSe2 (CIGS) solar cells with dual (top and bottom) gratings. The PSO tuned structure was demonstrated to be capable of achieving high and ultra broadband absorption spectra due to well-spaced and well-defined absorption peaks, which were SPPs and photonic modes induced by the metal and dielectric gratings. For only TM polarization and both polarizations, the fully optimized net absorptions exhibit 85.6% and 78.1%, which correspond to ~35.4% and ~23.5% improvement compared to optimized flat structures, respectively.

© 2014 Optical Society of Korea

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