一种新方法制备硅/聚(3,4-乙撑二氧噻吩)核/壳纳米线阵列杂化太阳能电池

A new approach to fabricating silicon nanowire/poly(3,4-ethylenedioxythiophene)hybrid heterojunction solar cells

采用气相聚合法制备了有机/无机杂化的硅/聚3,4-乙撑二氧噻吩核/壳纳米线阵列(SiNWs/PEDOT)太阳能电池.相对平面结构Si/PEDOT太阳能电池,SiNWs/PEDOT太阳能电池的能量转换效率提升了7倍,达到3.23%.对比分析反射光谱、I-V曲线及外量子效率的实验结果,发现SiNWs/PEDOT太阳能电池性能改进的主要原因可归结为:气相聚合法能够有效地制备出SiNWs/PEDOT电池的核/壳纳米线阵列结构,使得器件具有高光捕获、高比结面积和高电荷收集效率.

The silicon/poly（3,4-ethylenedioxythiophene）core/shell organic/inorganic nanowire array（SiNWs/PEDOT）hybrid heterojunction solar cells are successfully fabricated by silver-assisted chemical etching method and vapor phase polymerization processes.The SiNWs/PEDOT hybrid solar cell shows that the performance is improved greatly and an excellent power conversion efficiency of 3.23% is achieved,which is as seven times as large as that of the planar cell without the nanowire structure.In addition,the studies of the reflectance,the I-V curve and the external quantum efficiency show that the great enhancement of performance for the SiNWs/PEDOT cell is due to the fact that the Si/PEDOT core/shell nanowire structure is successfully fabricated by vapor phase polymerization method,resulting in a high light trapping effect,a large junction area and an enhancement of the carrier collection efficiency.