Optical and electrical simulations of silicon nanowire array/Poly(3-hexylthiophene):Phenyl-C61-butyric acid methyl ester hybrid solar cell

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.

采用耦合三维光电模拟来评估提高硅纳米线阵列（NWA）/聚（3 - 己基噻吩）（P3HT）:苯基 - C61 - 丁酸甲酯（PCBM）太阳能电池效率的光学和电学设计要求。由于添加了有机涂层，在低于和高于P3HT:PCBM吸收截止波长的波长处，都观察到硅纳米线阵列/P3HT:PCBM结构具有更好的光吸收。通过在AM1.5G光照下使最终光电流最大化来获得优化的光学设计。此外，从优化光吸收结构下太阳能电池的电学模拟来看，所提出的硅纳米线阵列/P3HT:PCBM混合电池在80nm的优化涂层厚度下表现出对激子复合不敏感的良好特性。即使在较高的双分子复合速率下，仍可获得9.4%的效率。（C）2014美国物理联合会出版有限责任公司。