Pure Deep Red Electroluminescence in Mixed Phase Quasi-2D Tin Iodide Perovskite Heterostructure.

ABSTRACT: Mixed cation quasi-2D tin iodide perovskites are promising materials for deep-red to NIR emitting light-emitting diode (LED) applications. However, phase purity remains the major concern to avoid mixed emissions from two or more wavelengths. This work presents the evolution of pure deep red electroluminescence (EL) centred at ≈700 nm corresponding to the emission of pure n = 2 2D crystalline phase. However, structural and optical studies evidenced the formation of mixed-phase heterostructures consisting of n = 1, n = 2, and n = ∞ phase (i.e., FASnI₃). It is observed that altering the mixed cation ratio, phase distribution is modified, affecting the EL behavior, causing the observation or absence of the n = 1 2D phase EL emission peak. Selective charge transport and their cascade

SUBMITTER: Sanchez-Diaz J 

PROVIDER: S-EPMC12462579 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature