Hybridisation of perovskite nanocrystals with organic molecules for highly efficient liquid scintillators  

作　　者：Sangeun Cho Sungwoo Kim Jongmin Kim Yongcheol Jo Ilhwan Ryu Seongsu Hong Jae-Joon Lee SeungNam Cha Eun BiNam Sang Uck Lee Sam Kyu Noh Hyungsang Kim Jungwon Kwak Hyunsik Im 

机构地区：[1]Division of Physics and Semiconductor Science,Dongguk University,Seoul 04620,Republic of Korea [2]Department of Radiation Oncology,Asan Medical Center,Seoul 05505,Republic of Korea [3]Department of Energy and Materials Engineering,Dongguk University,Seoul 04620,Republic of Korea [4]Department of Physics,Sungkyunkwan University,Suwon 2066,Republic of Korea [5]Department of Bionano Technology and Department of Applied Chemistry,Hanyang University,Ansan 15588,Republic of Korea

出　　处：《Light(Science & Applications)》2020年第1期530-538,共9页光（科学与应用)（英文版）

基　　金：supported by the National Research Foundation(NRF)of Korea(grants 2018R1A2B6007436,2018R1A2B6006320,2019R1I1A1A01048852 and 2016R1A6A1A03012877)。

摘　　要：Compared with solid scintillators,liquid scintillators have limited capability in dosimetry and radiography due to their relatively low light yields.Here,we report a new generation of highly efficient and low-cost liquid scintillators constructed by surface hybridisation of colloidal metal halide perovskite CsPbA_(3)(A:Cl,Br,I)nanocrystals(NCs)with organic molecules(2,5-diphenyloxazole).The hybrid liquid scintillators,compared to state-of-the-art CsI and Gd_(2)O_(2)S,demonstrate markedly highly competitive radioluminescence quantum yields under X-ray irradiation typically employed in diagnosis and treatment.Experimental and theoretical analyses suggest that the enhanced quantum yield is associated with X-ray photon-induced charge transfer from the organic molecules to the NCs.High-resolution X-ray imaging is demonstrated using a hybrid CsPbBr_(3) NC-based liquid scintillator.The novel X-ray scintillation mechanism in our hybrid scintillators could be extended to enhance the quantum yield of various types of scintillators,enabling low-dose radiation detection in various fields,including fundamental science and imaging.

关 键 词：PEROVSKITE LIQUID typically 

分 类 号：TQ132.32[化学工程—无机化工]