光强对有机小分子太阳电池光伏性能的影响  

Photovoltaic Performance of Small Molecular Solar Cells under Different Light Intensities

作　　者：吴甲奇[1,2] 李文佳[1,2] 席曦[3,2] 王振交 季静佳 顾晓峰[3] 李果华[1,4] 

机构地区：[1]江南大学理学院,江苏无锡214122 [2]尚德太阳能电力有限公司,江苏无锡214028 [3]江南大学物联网工程学院,江苏无锡214122 [4]江苏(尚德)光伏技术研究院,江苏无锡214028

出　　处：《半导体技术》2011年第7期505-509,共5页Semiconductor Technology

基　　金：教育部留学回国人员科研启动基金(教外司留[2008]890)

摘　　要：采用真空蒸镀的方法,制备了ZnPc(40 nm)/C60(20 nm)结构的电池,重点研究了不同光强测试条件下,ZnPc/C60电池光伏性能的变化情况。发现开路电压(Voc)和填充因子(FF)随光强呈现对数式的变化趋势,前者逐渐上升而后者则下降,短路电流与光强的关系为Jsc∝E1.13,电池的功率转换效率(η)随光强稳步上升。拟合计算得到电池的理想因子n=1.93;100 mW/cm2辐照条件下,Rs=25Ω,Rsh=116Ω;分析认为,器件的准费密能级分裂程度随光强增强而增大是导致开路电压增大的原因;而Jsc-E强于正比关系则是C60产生激子对电流有辅助贡献的结果。Solar cells with the structure of ZnPc（40 nm）/C60（20 nm）were fabricated by vacuum evaporation.The photovoltaic performance of ZnPc/C60 cells was observed under different light intensities.Both open-circuit voltage（Voc）and fill factor（FF）show a logarithmic dependence with incident power density（E）,while short-circuit current density（Jsc）exhibits a power law relation with E（Jsc∝E1.13）.As a result,the conversion efficiency of ZnPc/C60 cells grow up steadily with light intensity.The ideality factor n=1.93;Rs=25 Ω,Rsh=116 Ω under 100 mW/cm2 illumination.The increase of Voc with light intensity was attributed to the larger gap of the quasi-fermi level of the device as light intensity grew.And the photo-generated excitons in C60 film made the light dependent short-circuit current density stronger than normal level.

关 键 词：有机太阳电池 小分子材料 ZnPc/C60结构 光强 光伏性能 

分 类 号：TM914.4[电气工程—电力电子与电力传动]