UPSI Digital Repository (UDRep)
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Abstract : Universiti Pendidikan Sultan Idris |
We report the optical and scintillation properties of (C6H5CH2NH3)2SnBr4with excellent absorption length at 20 keV of 0.016 cm, measured bandgap of 2.51 eV, and photoluminescence lifetime of 1.05 ?s. The light yield obtained with the241Am 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. ? The Royal Society of Chemistry 2021. |
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