Optical And Electrical Simulations Of Silicon Nanowire Array/Poly(3-Hexylthiophene):Phenyl-C61-Butyric Acid Methyl Ester Hybrid Solar Cell
APPLIED PHYSICS LETTERS(2014)
Abstract
A coupled three-dimensional optoelectrical simulation was used to evaluate the optical and electrical designs requirements for improving the efficiency of Si nanowire array (NWA)/Poly(3-hexylthiophene) (P3HT):phenyl-C61-butyric acid methyl ester (PCBM) solar cells. Due to the addition of organic coating layers, better light absorptions are observed for the Si NWA/P3HT:PCBM structure at the wavelengths both below and above the absorption cutoff wavelengths of P3HT:PCBM. Optimized optical designs are obtained by maximizing the ultimate photocurrent under AM1.5G illumination. Furthermore, from the electrical simulation of the solar cell at optimized photo-absorption structure, the proposed Si NWA/P3HT:PCBM hybrid cell exhibits a promising character that is insensitive to exciton recombination at the optimized coating thickness of 80 nm. An efficiency of 9.4% can still be obtained even at high bimolecular recombination rates. (C) 2014 AIP Publishing LLC.
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Key words
silicon nanowire array/poly3-hexylthiophenephenyl-c61-butyric,solar cell
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