Structural control of organic-inorganic hybrid compounds for the development of fast response scintillators

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K20596
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 80040:Quantum beam science-related
• Research Institution: Akita University
• Principal Investigator: Kawano Naoki 秋田大学, 理工学研究科, 講師 (60800886)
• Project Period (FY): 2019-04-01 – 2021-03-31
• Keywords: シンチレータ / ドシメータ / 量子井戸

Outline of Final Research Achievements

Organic-inorganic layered perovskite-type compounds have gained much attention because of their unique exciton properties due to the quantum size effect, and they can be used as fast response scintillators for various applications such as spectroscopies at a synchrotron facility. In this work, we evaluated a mixed cation effect on the scintillation properties of (C6H5C2H4NH3)2PbBr4. The compounds with a chemical composition of (C6H5C2H4NH3)2Pb1-xMxBr4 (M: Cd, Zn, Sn, Ni) were found to show fast decay times about 10 ns, and high light yields about 20000 photons/MeV, which were higher than that of (C6H5C2H4NH3)2PbBr4.

Free Research Field

量子ビーム関連

Academic Significance and Societal Importance of the Research Achievements

シンチレータとは高エネルギーの放射線を低エネルギーの光に変換する蛍光体材料であり、医療機器やセキュリティ機器、資源探索など様々な用途に利用されている。今回、有機無機ペロブスカイト型化合物の組成制御を通じて、高い発光量及び数ナノ秒の寿命を示す化合物を作製に成功した。この発光特性は、癌診断で利用されるポジトロン断層法装置や放射光施設での分光測定など、高い発光量と短い寿命の光学特性が不可欠な様々な用途への応用が期待される。