Scintillation properties of (C₆H₅C_nH_2nNH₃)₂PbCl₄ (n = 1-4)

Organic-inorganic perovskite crystals (C₆H₅C_nH_2n NH₃)₂PbCl₄ (n = 1: PMA, n = 2: PEA, n = 3: PPA, and n = 4: PBA) were prepared, and their scintillation characteristics were evaluated. A broad emission peak originating from self-trapped excitons (STE) was observed from all of the crystals when excited by 310 nm light. Further, the broad emission was also clearly observed from PMA, PEA, and PBA under X-ray. Moreover, the scintillation light yields under α-ray were calculated to be 1460 (PEA), 439 (PPA), and 120 (PBA) photons/5.5 MeV-α, and the light yield of PEA was higher than that of a ZnO single crystal. In addition, all of the crystals showed a fast decay-time attributable to STE under X-ray. (author)