An embedded interfacial network stabilizes inorganic CsPbI₃ perovskite thin films.

ABSTRACT: The black perovskite phase of CsPbI₃ is promising for optoelectronic applications; however, it is unstable under ambient conditions, transforming within minutes into an optically inactive yellow phase, a fact that has so far prevented its widespread adoption. Here we use coarse photolithography to embed a PbI₂-based interfacial microstructure into otherwise-unstable CsPbI₃ perovskite thin films and devices. Films fitted with a tessellating microgrid are rendered resistant to moisture-triggered decay and exhibit enhanced long-term stability of the black phase (beyond 2.5 years in a dry environment), due to increasing the phase transition energy barrier and limiting the spread of potential yellow phase formation to structurally isolated domains of the grid. T

SUBMITTER: Steele JA 

PROVIDER: S-EPMC9727127 | biostudies-literature | 2022 Dec

REPOSITORIES: biostudies-literature