光栅电极在有机太阳能电池中的增强效应研究  

Study on Enhancement Effects of a Grating Electrode in Organic Solar Cells

作　　者：肖啸[1,2] 许德富[1] 肖志刚[1] 邓迟[1] 李贤[1] 张志友[2] 杜惊雷[2] 

机构地区：[1]乐山师范学院物理与电子工程学院,四川乐山614000 [2]四川大学物理科学与技术学院,四川成都610064

出　　处：《光学学报》2015年第A01期260-265,共6页Acta Optica Sinica

基　　金：国家自然科学基金（11305111）、四川省教育厅自然科学基金（12ZA071,15ZA0280）、乐山师范学院培育项目（Z1320）

摘　　要：在有机太阳能电池（OSC）中，活性层的光学吸收能力和电学传输能力之间存在着严重的不匹配，这是制约OSC效率提升的主要因素之一，而表面等离子体陷光技术是解决该矛盾的一种有效手段。将金属光栅结构植入OSC中作为电极，建立了基于等离子体金属光栅电极的OSC器件模型，采用时域有限差分法分析了光栅电极的等离子体增强效应对器件内部光场的影响。结果表明，金属等离子体光栅电极具有优秀的陷光能力和角度响应特性，对活性层的光吸收具有明显的增强作用。There is a significant mismatch between the optical absorption properties and electrical transmission properties in organic active layer, this contradiction is regarded as a main reason for limiting the conversion efficiency of organic solar cells （OSC）. Fortunately, plasmonic light trapping has emerged as an effective technology to overcome this mismatch. Metal gratings are embedded in OSCs as bottom electrodes, and an OSC structure based on plasmonic grating electrode is proposed. Furthermore, optical field distributions in OSCs are numerically investigated by finite difference in time domain, and the plasmonic enhancement effects of metal gratings are analyzed. The results show plasmonic gratings have excellent light trapping ability and response to incident angle, so there is obvious light absorption enhancement in active layer.

关 键 词：光学器件 陷光结构 时域有限差分法 有机太阳能电池 表面等离子体 

分 类 号：TM914.4[电气工程—电力电子与电力传动]