B-Site Doping Engineering of Zero-Dimensional Perovskite Cs3MnCl5: Stability Improvement and Multicolor Luminescence Regulation |
| Y.F. Zhang, Y. Li, S.Y. Shen
College of Mathematics and Physics, Shanghai University of Electric Power, 1851 Hucheng Ring Road, New Pudong District, 201306 Shanghai, People’s Republic of China |
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| Mn-based zero-dimensional metal halide perovskites have attracted much attention in the field of lead-free optical materials due to their rich manganese reserves, environmental friendliness, and the unique d–d transition characteristics of Mn2+. However, the poor water and oxygen stability and single luminous color of the intrinsic material severely limit the practical applications. In this paper, high-quality all-inorganic zero-dimensional perovskite Cs3MnCl5 single crystals were successfully prepared by the vacuum solid-state reaction method, and the regulation mechanism of heterovalent ions (Ag+, Ce3+, Sb3+) on the stability and luminescence properties of the materials was studied by B-site doping. X-ray diffraction and X-ray photoelectron spectroscopy analysis confirm that the doped ions successfully enter the Cs3MnCl5 lattice and occupy the Mn2+ sites, resulting in lattice expansion. Optical characterization shows that the intrinsic Cs3MnCl5 exhibits a bright green emission at 520 nm derived from the 4T1–6A1 transition of the Mn2+ tetrahedral coordination. Ag+ doping significantly improves the environmental stability of the material, and the maintenance time of green fluorescence in a high-humidity environment increases by more than ten times compared with the intrinsic material. Ce3+ doping induces the dual luminescence of violet (~ 420 nm) derived from the Ce3+ 5d–4f transition and green emission from Mn2+, and the dual intensity ratio can be flexibly adjusted by excitation wavelength to achieve cold white light emission at 365 nm excitation. Sb3+ doping introduces orange emission (~ 585 nm), derived from the Sb3+ 3P1–1S0 transition, resulting in yellow–green fluorescence. This work provides a new design idea for the application of Mn-based zero-dimensional halides. |
DOI:10.12693/APhysPolA.149.145 topics: metal halide perovskites, Cs3MnCl5, luminescence, doping |