Diguna Lina Jaya, Kaffah Silmi, Mahyuddin Muhammad Haris, Maddalena Francesco, Bakar Suriani Abu, Aminah Mimin, Onggo Djulia, Witkowski Marcin Eugeniusz, Makowski Michal, Drozdowski Winicjusz, Birowosuto Muhammad Danang
School of Applied Science, Technology, Engineering, and Mathematics, Universitas Prasetiya Mulya Kavling Edutown I.1, Jl. BSD Raya Utama, BSD City Tangerang 15339 Indonesia
Research Group of Advanced Functional Materials, Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung Jl. Ganesha 10 Bandung 40132 Indonesia
RSC Adv. 2021 Jun 10;11(34):20635-20640. doi: 10.1039/d1ra01123e. eCollection 2021 Jun 9.
We report the optical and scintillation properties of (CHCHNH)SnBr with excellent absorption length at 20 keV of 0.016 cm, measured bandgap of 2.51 eV, and photoluminescence lifetime of 1.05 μs. The light yield obtained with the Am source is 3600 ± 600 photons per MeV, which is much smaller than the maximum attainable light yield obtained from the bandgap. Temperature dependent radioluminescence measurements confirm the presence of thermal quenching at room temperature with the activation energy and the ratio between the attempt and the radiative transition rates of 61 meV and 129, respectively. Although thermal quenching affects light yield at room temperature, this green light-emitting perovskite opens an avenue for new lead-free scintillating materials.
我们报告了(CHCHNH)SnBr的光学和闪烁特性，其在20 keV时的吸收长度极佳，为0.016 cm，测量的带隙为2.51 eV，光致发光寿命为1.05 μs。用Am源获得的光产额为每兆电子伏特3600±600个光子，这比从带隙获得的最大可实现光产额小得多。温度相关的辐射发光测量证实了室温下存在热猝灭，其激活能以及尝试与辐射跃迁率之比分别为61 meV和129。尽管热猝灭会影响室温下的光产额，但这种绿色发光钙钛矿为新型无铅闪烁材料开辟了一条途径。
