Interfacial electrostatic repulsion inhibits iodide ion migration for enhancing reverse-bias stability of perovskite solar cells.

ABSTRACT: The perovskite solar cells (PSCs) achieve notable advances in stability under humidity, light, and heat stress. However, PSCs are still susceptible to reverse-bias degradation, mainly due to the inevitable iodide ions migration. Herein, we reveal the irreversible cross-layer migration of iodide ion (I^-) within PSCs under reverse bias, which contributes to the device performance failure. Further, we innovatively construct an electrostatic repulsion with I^- at the perovskite interface, which can inhibit I^- cross-layer migration under reverse bias in a nonbonding manner. Besides, the TFMS capable of blocking the hole injection can reduce the interface I^- oxidation under reverse bias. The modified PSCs deliver efficiencies of 25.80% with TiO₂

SUBMITTER: Lan Z 

PROVIDER: S-EPMC12738754 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature