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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