Excitation-Selective and Double-Emissive Lead-Free Binary Hybrid Metal Halides for White Light-Emitting Diode and X-Ray Scintillation.
Dianxing JuMing ZhouZhichao LiuPeng RanZhiwen DongShuo HouHao LiWenge XiaoXuhui XuHuifang LiYang Michael YangTingming JiangPublished in: Small (Weinheim an der Bergstrasse, Germany) (2023)
Zero-dimensional (0D) organic metal halides comprising heterogeneous metal cations in single phase can achieve multiple luminous emissions enabling them toward multifunctional light-emitting applications. Herein, A novel single crystal of (C 8 H 20 N) 4 SbMnCl 9 containing two luminescent centers of [SbCl 5 ] 2- pentahedrons and [MnCl 4 ] 2- tetrahedrons is reported. The large distance between Sb-Sb, Mn-Mn, and Sb-Mn as well as theory calculation indicate negligible interaction between individual centers, thus endowing (C 8 H 20 N) 4 SbMnCl 9 with excitation-dependable and efficient luminescence. Under near-UV excitation, only orange emission originates from self-trapped excitons recombination in [SbCl 5 ] 2- pentahedron occurs with photoluminescence quantum yield (PLQY) of 91.5%. Under blue-light excitation, only green emission originating from 4 T 1 - 6 A 1 transition of Mn 2+ in [MnCl 4 ] 2- tetrahedrons occurs with PLQY of 66.8%. Interestingly, upon X-ray illumination, both emissions can be fully achieved due to the high-energy photon absorption. Consequently, (C 8 H 20 N) 4 SbMnCl 9 is employed as phosphors to fabricate white light-emitting diodes optically pumped by n-UV chip and blue-chip thanks to its excitation-dependable property. Moreover, it also shows promising performance as X-ray scintillator with low detection limit of 60.79 nGy air S -1 , steady-state light yield ≈54% of commerical scintillaotr LuAG:Ce, high resolution of 13.5 lp mm -1 for X-ray imaging. This work presents a new structural design to fabricate 0D hybrids with multicolor emissions.
Keyphrases
- light emitting
- high resolution
- energy transfer
- dual energy
- metal organic framework
- quantum dots
- room temperature
- mass spectrometry
- transition metal
- circulating tumor cells
- high throughput
- electron microscopy
- ionic liquid
- drug delivery
- dna damage
- computed tomography
- life cycle
- municipal solid waste
- monte carlo
- cancer therapy
- magnetic resonance
- high speed
- risk assessment
- dna repair
- fluorescent probe