General phase segregation and phase pinning effects in lanthanide-doped lead halide perovskite with dual-wavelength lasing.

ABSTRACT: A strategy of lanthanide-ion doping into dual-halogen-alloyed perovskites CsPb(X_xY_1-x)₃ (X, Y = Cl, Br, I) via chemical vapor deposition is introduced, obtaining a series of high-quality, stable microplates. Under continuous light excitation, each sample exhibits highly stable dual-band photoluminescence emission, whereby pairwise combinations of the three halogens enable photoluminescence to cover the red, green, and blue spectral regions. Corresponding high-performance dual-wavelength lasers are achieved. The segregated phase domains are tens of nanometers in size with well-defined boundaries. Theoretical calculations indicate that lanthanide-ion doping promotes phase segregation and facilitates ion migration in the alloyed case, while suppressing it in t

SUBMITTER: He J 

PROVIDER: S-EPMC12708867 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature