Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore 637553.
Nanoscale. 2014;6(3):1675-9. doi: 10.1039/c3nr04857h.
The good electrical and morphological characteristics of TiO₂ nanofibers and the high extinction coefficient of CH₃NH₃PbI₃ perovskite are combined to obtain a solar cell with a power conversion efficiency of 9.8%. The increase of the film thickness dramatically diminishes the performance due to the reduction in porosity of the TiO₂ nanofiber framework. The optimum device (∼413 nm film thickness) is compared to a planar device, where the latter produces higher V(oc) but lower J(sc), and consequently lower efficiency at all measured light intensities.
TiO₂ 纳米纤维具有良好的电学和形态特性，CH₃NH₃PbI₃ 钙钛矿的消光系数高，将两者结合起来可获得功率转换效率为 9.8%的太阳能电池。薄膜厚度的增加会显著降低性能，因为 TiO₂ 纳米纤维框架的孔隙率降低。与平面器件相比，最佳器件（约 413nm 薄膜厚度）的性能更好，后者具有更高的开路电压（Voc），但短路电流（Jsc）较低，因此在所有测量的光强下效率都较低。
