Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 1, Pages 961-970Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c20043
Keywords
layered perovskites; perovskite solar cells; photostability; thermal degradation; photodegradation mechanism; hybrid halide perovskites; nonmonotonic photostability row
Funding
- Russian Science Foundation [19-73-30022]
- European Research Council under the European Union [802862]
- European Research Council (ERC) [802862] Funding Source: European Research Council (ERC)
Ask authors/readers for more resources
Layered lead halide perovskites (2D LHPs) are being studied as a promising material for solar cell devices. The research shows that thicker layers of 2D LHPs (n>=3) exhibit better photostability, with the surrounding oxygen concentration playing a critical role in the photodegradation process.
Layered lead halide perovskites (2D LHPs) are attracting considerable attention as a promising material for a new generation of solar cell devices. LHPs have been presented as a more stable alternative to the more widespread 3D bulk perovskite materials; however, a critical analysis of their photostability is still lacking. In this work, we perform a comparative study between BA(2)MA(n-1)Pb(n)I(3n+1) (BA-butylammonium and MA-methylammonium 2D LHPs with different dimensionalities (n = 1-3) and MAPbI(3) 3D perovskites. We compare different stability testing protocols including photometrical determination of iodine-containing products in nonpolar solvents, X-ray diffraction, and photoluminescence (PL) spectroscopy. The resulting trends of the photostability in an inert atmosphere based on PL spectroscopy measurements demonstrate a nonmonotonic dependence of the degradation rate on the perovskite layer thickness n with a stability island at n >= 3, which is caused by a combination of antibate factors of electronic structures and chemical compositions in the family of 2D perovskites. We also identify a critical oxygen concentration in the surrounding environment that affects the mechanism and strongly enhances the rate of layered perovskite photodegradation.
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