Journal
ACS APPLIED ENERGY MATERIALS
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.3c01799
Keywords
CsPbI3 inorganicperovskite solar cells; imidazole; defects; Lewis acid-base interaction; low-temperature processing
Ask authors/readers for more resources
In this study, amphoteric imidazole was introduced to improve the quality of low-temperature processed CsPbI3 films. Imidazole formed strong coordination with Pb2+ and I- in perovskites, delaying the crystallization rate and leading to larger grains, improved crystallinity, and suppressed grain boundary defects. This research provides a facile strategy to enhance the performance of low-temperature processed CsPbI3 PSCs.
Inorganic perovskite CsPbI3 is regarded as a promising substitution of organic-inorganic hybrid perovskite because of its high thermal stability. To achieve high-performance and stable perovskite solar cells (PSCs), CsPbI3 films with large grains and low trap densities are required. In this paper, amphoteric imidazole with synergistic properties of Lewis acid and base is introduced to improve the quality of low-temperature processed CsPbI3 films. Imidazole is prone to form strong coordination with Pb2+ and I- in perovskites through a Lewis acid-base interaction, delaying the crystallization rate of CsPbI3 films. This results in enlarged grains, improved crystallinity, and suppressed formation of defects at grain boundaries. The power conversion efficiency of PSCs increases from 13.12% (control group) to 14.88% (imidazole-containing group) with improved stability. This work provides a facile strategy to improve the performance of low-temperature processed CsPbI3 PSCs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available