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Inverted (p-i-n) perovskite solar cells (PSCs) are receiving increasing attention due to their high conversion efficiency and good stability. The main factor restricting the efficiency improvement of inverted perovskite cells is the interface defects between the perovskite layer and the charge transport layers. Therefore, the dual modification strategy of 1,3-diaminopropane dihydroiodide (PDADI) passivates the interface defects between perovskite films and charge transport layers, improves the quality of perovskite film formation, suppresses non radiative recombination between perovskite films and charge transport layers as well as improved charge carrier transport, and results in a conversion efficiency of 23.19%. Furthermore, the unencapsulated PSCs with PDADI dual modification also exhibit good storage stability, after being placed at a temperature of 25 ℃ and a humidity of less than 20% for 600 hours, the efficiency remained at 96% of the initial efficiency. Therefore, PDADI dual modification providing an effective strategy for the fabrication of high-efficiency and stable inverted perovskite solar cells.
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Keywords:
- Inverted /
- Perovskite solar cells /
- Defects passivation /
- PDADI
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