Argon Plasma Treatment to Tune Perovskite Surface Composition for High Efficiency Solar Cells and Fast Photodetectors

作者：Xiao Xun; Bao Chunxiong; Fang Yanjun; Dai Jun; Ecker Benjamin R; Wang Congcong; Lin Yuze; Tang Shi; Liu Ye; Deng Yehao; Zheng Xiaopeng; Gao Yongli; Zeng Xiao Cheng; Huang Jinsong

来源：Advanced Materials, 2018, 30(9): 1705176.

DOI：10.1002/adma.201705176

<jats:title>Abstract</jats:title><jats:p>The surface composition of perovskite films is very sensitive to film processing and can deviate from the optimal, which generates unfavorable defects and results in efficiency loss in solar cells and slow response speed in photodetectors. An argon plasma treatment is introduced to modify the surface composition by tuning the ratio of organic and inorganic components as well as defect type before deposition of the passivating layer. It can efficiently enhance the charge collection across the perovskite–electrode interface by suppressing charge recombination. Therefore, perovskite solar cells with argon plasma treatment yield enhanced efficiency to 20.4% and perovskite photodetectors can reach their fastest respond speed, which is solely limited by the carrier mobility.</jats:p>

• 出版日期2018-3-1