High-Resolution Flexible X-ray Imaging in a Two-Dimensional Mn²⁺-Doped Perovskite Scintillator

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 8, 2025

Flexible scintillator screens characterized by high spatial resolution, low cost, and a simple fabrication process are in significant demand for applications medical diagnosis industrial detection. Here, we have demonstrated new Mn2+-doped two-dimensional (2D) Ruddlesden-Popper type perovskite, (4-tert-butylbenzylamine)2PbBr4:Mn, serving as highly efficient candidate. Doping with Mn2+ induces spin-forbidden internal transition (4T1g → 6A1g) that enhances the energy-transfer efficiency from strongly bound excitons of host material to d electrons ions, ultimately leading intense orange-red emission. This photoluminescence quantum yield (4-tert-butylbenzylamine)2PbBr4 (1) decreases its self-absorption. Therefore, at optimal Mn2+-doping concentration, 1:8.4%Mn2+ demonstrates light 21,532 Ph/MeV detection limit 198.19 nGyair s-1, exceeding performance commercial bismuth germanium oxide (BGO) scintillator. Furthermore, combined ultrafine powders poly(dimethylsiloxane) fabricate flexible films. With film thickness mass percentage 1:8.4%Mn2+, films achieve their maximum resolution 17.3 lp mm-1. The above results indicate exceptional scintillation imaging effectively addresses shortcomings current scintillators, thereby providing option family.

Language: Английский

Eu2+ doped glass scintillators with high-scintillating performances for X-ray imaging

Materials Today Chemistry, Journal Year: 2025, Volume and Issue: 46, P. 102724 - 102724

Published: April 25, 2025

Language: Английский