Efficient TiO2 Surface Treatment Using Cs2CO3 for Solution-Processed Planar-Type Sb2S3 Solar Cells

Nanoscale Research Letters

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[1] 0000 0004 0438 6721, grid.417736.0, Convergence Research Center for Solar Energy, Daegu Gyeongbuk Institute of Science and Technology (DGIST), 42988, Daegu, Republic of Korea;

关键词: Planar-type SbS solar cell;    Electron transport layer;    Surface treatment;    Solution process;    CsCO;   

DOI  :  10.1186/s11671-019-2858-5

来源: publisher

【 摘 要 】

We report a highly effective surface treatment method for planar-type Sb2S3 solar cells by employing a Cs2CO3-modified compact TiO2 (c-TiO2) electron transport layer. It is found that surface treatment using a Cs2CO3 solution can shift the work function of c-TiO2 upward and reduce its surface roughness. As a result, compared with the power conversion efficiency of untreated solar cells, that of the treated solar cells with a glass/FTO/c-TiO2(/Cs2CO3)/Sb2S3/P3HT/Au structure significantly improved from 2.83 to 3.97%. This study demonstrates that the introduction of Cs2CO3 on a c-TiO2 layer is a simple and efficient way to adjust the work function of the electron transport layer and fabricate high-performance planar-type Sb2S3 solar cells.

【 授权许可】

CC BY