Scintillation properties of (H₃NC _n H_2n NH₃)PbBr₄ (n = 8, 10, 12)

Abstract

Abstract We prepared (H 3 NC 8 H 16 NH 3 )PbBr 4 (1–8DIO), (H 3 NC 10 H 20 NH 3 )PbBr 4 (1–10DID), and (H 3 NC 12 H 24 NH 3 )PbBr 4 (1-12DIDD) crystals, and evaluated the photoluminescence (PL) and scintillation characteristics. A luminescence peak derived from free excitons was detected at around 400 nm from the crystals in the PL spectra, and the quantum yields were 8% (1-8DIO), 13% (1-10DID), and 7% (1-12DIDD). Also, scintillation light yields were determined to be 5070 photons MeV –1 for the 1-8DIO crystal, 2400 photons MeV –1 for the 1-10DID crystal, and 830 photons MeV –1 for the 1-12DIDD crystal, and they had a fast scintillation decay time of 4.8 ns (1-8DIO), 6.8 ns (1-10DID), and 3.1 ns (1-12DIDD) owing to the free exciton emissions.