摘要
近年来,钙钛矿太阳能电池以其优秀的光电效率受到了广泛的关注。在钙钛矿太阳能电池中,电子传输层对光生载流子的抽取和输运起重要的作用。本工作提出了一种Ti O2/Zn O复合电子传输层,该复合层同时具有高的界面电荷抽取速度和低的界面复合。同单独的Ti O2和Zn O电子传输层相比,该复合层显著的降低了前表面复合速度。经过一系列的复合层厚度的优化,我们获得了超过17%的光电转化效率。这个结果为进一步提高器件的光电效率提供了一种新思路。
A TiO_2/ZnO electron transport bilayer, which combines the advantages of high electron extraction and low interfacial recombination together, has been designed for planar perovskite solar cells. With this bilayer, the front surface recombination in the cell is significantly suppressed, and a high efficiency exceeding 17% has been achieved. These results suggest a promising and simple approach to further design photovoltaic devices from the aspect of charge transport and recombination.
引文
[1]Xin Xu.;Huiyin Zhang.;Qingbo Meng,L.J.Mater.Chem.A,2015,3,19288-19293