Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6533919 | Solar Energy Materials and Solar Cells | 2018 | 6 Pages |
Abstract
A hole-transporting layer is essential for effective operation of planar perovskite solar cells. Hole-transporting materials (HTMs) used so far are mainly based on organic semiconductors, which are usually expensive and relatively instable compared with inorganic materials. In this article, crystalline selenium (c-Se) prepared by thermal evaporation followed by annealing at low temperature was used as the hole-transporting layer for the planar perovskite solar cells in the device structure of fluorine-doped tin oxide (FTO)/SnO2/perovskite/selenium/Au. The device employing c-Se as HTM displayed enhanced long-term stability, keeping 80% of the original efficiency after 40 days in ambient environment. However, the power conversion efficiency of 8.3% remains low compared with the device based on spiroOMeTAD, which results from higher recombination in the c-Se device as determined by impedance spectroscopy. Thermal-evaporated selenium could be a low-cost and easy-fabrication HTM for efficient and stable perovskite solar cells after reducing the recombination in devices.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
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Authors
Yunxiang Di, Qiang Zeng, Chun Huang, Ding Tang, Kaiwen Sun, Chang Yan, Ying Wang, Shanming Ke, Liangxing Jiang, Xiaojing Hao, Yanqing Lai, Fangyang Liu,