Achieving a Record Scintillation Performance by Micro‐Doping a Heterovalent Magnetic Ion in Cs₃Cu₂I₅ Single‐Crystal

Abstract

Ultra‐bright, ultra‐fast, and low‐cost ideal scintillator has been critically absent and sorely desired in scintillation detection and has hitherto not been found. Here, we report a high‐quality bulk Cs3Cu2I5:Mn single‐crystal scintillator with ultra‐high light yield (∼95,772 photons/MeV, 137Cs γ‐ray), excellent energy resolution (3.79%, 662 KeV), and ultra‐fast scintillation decay time (3 ns, 81.5%). In mechanism, we find that the micro‐doping of heterovalent magnetic ions (at the ppm level) can effectively modulate the luminescence kinetics of self‐capture excitons in the scintillator. Compared with previous reports, the introduction of trace amounts of magnetic Mn2+ (∼18.6 ppm) in Cs3Cu2I5 single‐crystal shortens the scintillation decay time by several hundred times, transforming slow decay into ultra‐fast decay. Simultaneously, the light yield is also increased about three times to the highest value so far. From the comprehensive performance of the micro‐doped Cs3Cu2I5:Mn single‐crystal, these excellent scintillation properties, physical characteristics suitable for practical applications, and low‐cost advantages render this single‐crystal an ideal scintillator with great potential for commercialization.This article is protected by copyright. All rights reserved

A zero-dimensional hybrid copper(i) bromide single crystal with highly efficient green emission

“…2c displays the ultraviolet-visible (UV/Vis) absorption spectrum of the (AEP) 2 Cu 2 Br 6 Á2BrÁ2H 2 O powder sample at room temperature, and the optical bandgap obtained by fitting the Tauc equation is approximately 3.27 eV, which agrees with the structural features of copper halides reported in other studies. [30][31][32][33] Of particular note, (AEP) 2 Cu 2 Br 6 Á2BrÁ2H 2 O exhibits a PL decay lifetime of 121.1 ms at room temperature (Fig. 2d) of the same order as (C 6 H 14 N 8 )CuBr 3 (16.89 ms) and (MA) 4 Cu 2 Br 6 (120 ms).…”

Recent Advances in Fast-Decaying Metal Halide Perovskites Scintillators

“…To further optimize the scintillation decay lifetime of STEs emission, their group proposed a microdoping heterovalent magnetic strategy, which shortens the scintillation decay time of 0D MHPs by several hundred times. 54 Introducing trace amounts of Mn 2+ in Cs 3 Cu 2 I 5 can enhance the light yield 3fold and modify the slow decay into fast decay. The Cs 3 Cu 2 I 5 :Mn single crystals with regular shape and high transmittance were obtained by self-designed solution growth method.…”

Exceptional optical performance of the zero-dimensional hybrid cuprous halide ETPA2Cu2I4 as an X-ray scintillator

“…However, excessive Mn 2+ doping disrupts the charge balance, leading to efficiency loss. Reng 27,28 and associates investigated the influence of trace Mn 2+ doping on the triplet self-trapped exciton luminescence of Cs 3 Cu 2 I 5 . Trace Mn 2+ ions with magnetism were found to impact the exciton spin in the matrix, improving the singlet portion of self-trapped exciton luminescence.…”