Light-Induced Metallic and Paramagnetic Defects in Halide Perovskites from Magnetic Resonance.

ABSTRACT: Halide perovskites are promising next-generation solar cell materials, but their commercialization is hampered by their propensity to degrade under operating conditions, particularly under heat, humidity, and light. Identifying degradation products and linking them to the degradation mechanism at the atomic scale is necessary to design more stable perovskite materials. Here we use magnetic resonance methods to identify and characterize the formation of both metallic lead clusters and Pb³⁺ defects upon light-induced degradation of methylammonium lead halide perovskite using nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR) measurements. Paramagnetic relaxation enhancement (PRE) of the ¹H NMR resonances demonstrates the presence of localized par

SUBMITTER: Mishra A 

PROVIDER: S-EPMC11474947 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature