Modeling optical effects and thickness dependent current in polymer bulk-heterojunction solar cells
Modeling optical effects and thickness dependent current in polymer bulk-heterojunction solar cells
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DOI：
10.1063/1.2388854
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发表时间：
2006-12
影响因子：
3.2
通讯作者：
Douglas W. Sievers;Vishal Shrotriya;Yang Yang-Yang
中科院分区：
文献类型：
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作者：
Douglas W. Sievers;Vishal Shrotriya;Yang Yang-Yang
研究了以聚[2-甲氧基-5-（2′-乙基己氧基）-1，4-亚苯基亚乙烯基]和甲基富勒烯（[6，6]-苯基C61-丁酸甲酯）为活性材料的聚合物基本体异质结光伏电池的器件特性随活性层厚度的变化。短路电流的光学效应和其振荡变化的聚合物层厚度的依赖性解释通过解决短路电流使用的漂移扩散方程，其中从光学传输矩阵理论计算的光强度被用作输入光载波产生。此外，聚合物层的厚度对其他设备的操作参数，如开路电压，填充因子，和串联电阻率的影响进行了测量。考虑到上述参数的变化，最佳的功率转换效率高达1.8%（在模拟的空气质量1.5全球条件下）的聚合物层厚度的器件。
Device characteristics of polymer based bulk-heterojunction photovoltaic cells incorporating poly[2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene] and methanofullerene ([6,6]-phenyl C61-butyric acid methyl ester) as the active materials are examined as a function of active layer thickness. The dependence of short circuit current on optical effects and its oscillatory variation on the polymer layer thickness is explained by solving the short circuit current using the drift-diffusion equations, where the light intensity calculated from the optical transfer matrix theory is used as the input for optical carrier generation. Furthermore, the effects of polymer layer thickness on other device operation parameters such as open-circuit voltage, fill factor, and series resistivity are measured. Considering the variation of above mentioned parameters, an optimized power conversion efficiency as high as 1.8% (under simulated air mass 1.5 global conditions) was achieved for a device with a polymer layer thickn...