Radiation response properties of organic−inorganic perovskite-type compounds in a nanoporous glass

Abstract

We fabricated hybrid composites, where various organic–inorganic layered perovskite-type compounds (C6H5C2H4NH3)2PbBr4, (C6H5CH2NH3)2PbBr4, and (C4H9NH3)2PbBr4 were incorporated into a nanoporous glass, and their photoluminescence and scintillation properties were investigated for fast scintillator applications. A photoluminescence peak derived from free excitons was observed at around 410 nm for all the samples. Furthermore, a sharp scintillation peak originating from excitons was detected from the hybrid composites with (C6H5C2H4NH3)2PbBr4 or (C6H5CH2NH3)2PbBr4, and the hybrid composite with (C6H5C2H4NH3)2PbBr4 showed the highest scintillation intensity. In addition, afterglow levels of the fabricated hybrid composites were 430–620 ppm, and the values were higher than that of a (C6H5C2H4NH3)2PbBr4 single crystal.

Excitonic feature in CsAg2I3 crystals prepared by Bridgman method

“…Because of the high potential of hybrid organic inorganic Pb halides with perovskite structures as solar cells, 1,2) hybrid perovskite Pb halides and various ternary Pb halides have been extensively researched for application to solar cells, 3,4) scintillator materials, [5][6][7] photodetectors, [8][9][10] and LEDs. 11,12) However, the environmental toxicity of Pb remains a significant concern.…”