透明导电电极对聚合物太阳能电池光学性能的影响

Effect of transparent conductive electrode on optical properties of polymer solar cells

采用传输矩阵法研究了基于MoO3/Ag/MoO3(MAM)透明导电电极和ITO电极的聚合物太阳能电池的光学性能。分别对电池耦合层厚度、活化层厚度和金属电极进行了优化,得到了优良效率的结构。结果表明,MAM与ITO有机太阳能电池在不同活性层厚度和不同光学间隔层厚度条件下有明显的光学性能差异;对于薄活性层MAM电极器件(100nm),最大短路电流密度可达到16.85mA/cm^2,比ITO器件提高了7.3mA/cm^2,而对于厚活性层MAM电极(270nm),ITO电极器件的光学性能明显优于MAM器件;还通过改变光学间隔层LiF的厚度进行计算,得出本仿真条件下两种结构性能差异的临界光学间隔层厚度为30nm。

The optical properties of polymer solar cells based on MoO3/Ag/MoO3(MAM) transparent conductive electrode and ITO electrode were studied by transfer matrix method. The thickness of coupling layer, activation layer and metal electrode were optimized respectively, and the structure with excellent efficiency was obtained. The results show that MAM and ITO organic solar cells have obvious differences in optical properties under different active layer thickness and optical spacer thickness. The results show that the maximum short-circuit current density can reach 16.85 mA/cm^2 for thin active layer(100 nm), which is 7.3 mA/cm^2 higher than that of ITO device. For thick active layer MAM electrode(270 nm), the optical performance of ITO device is obviously better than that of MAM device. In addition, by changing the thickness of LIF, the critical thickness of optical spacer 30 nm is obtained in our simulation.