Citation: Longxiang LUO, Xiaoguo CAO, Yannan QIAN. Interface engineering with NH₄PF₆ for CsPbI₂Br quantum dots for enhancing the performance of carbon-based all-inorganic perovskite solar cells[J]. Chinese Journal of Inorganic Chemistry, ;2026, 42(2): 227-236. doi: 10.11862/CJIC.20250279 shu

Interface engineering with NH₄PF₆ for CsPbI₂Br quantum dots for enhancing the performance of carbon-based all-inorganic perovskite solar cells

School of Materials and Energy, Guangdong University of Technology, Guangzhou 510000, China

Corresponding author: Xiaoguo CAO, xgcao@gdut.edu.cn
Received Date: 5 September 2025
Revised Date: 23 December 2025

Figures(5)

Short-chain ligand ammonium hexafluorophosphate (NH₄PF₆) was used to modify the surface of CsPbI₂Br perovskite quantum dots, thereby constructing a multifunctional interlayer between the perovskite light-absorbing layer and the carbon electrode. This strategy effectively passivated surface defects in the perovskite layer and synergistically improved the interfacial morphology. As a result, the carbon-based, all-inorganic perovskite solar cells fabricated using this approach exhibited a reduced defect density. They suppressed non-radiative recombination, leading to a notable increase in photoelectric conversion efficiency from 11.55% to 13.23%. Moreover, the unencapsulated device retained 82% of its initial efficiency after being stored for 600 h in a low-humidity environment.
- carbon-based,
- perovskite solar cell,
- CsPbI₂Br quantum dot,
- ligand exchange,
- passivation
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Interface engineering with NH₄PF₆ for CsPbI₂Br quantum dots for enhancing the performance of carbon-based all-inorganic perovskite solar cells