Quantum confinement effects in semiconducting scintillators

Kengo Shibuya, Naoko Inadama, Eiji Yoshida, Taiga Yamaya, Hideo Murayama, Masanori Koshimizu, Keisuke Asai

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


A physical method to develop a scintillator with both a large light output and a quick response is proposed and demonstrated. A direct-gap semiconductor often exhibits ultrafast scintillation components with subnanosecond decay time constants at very low temperatures. However, the exciton luminescence is significantly quenched at room temperature to lose the practical merits. The authors found that the thermal quenching was effectively prevented by constructing a low-dimensional quantum confinement system and a practical amount of light output was obtained at room temperature without losing the quickness of the radiative recombination of the exciton. Crystals of (C6H 13NH3)2PbI4 having a multiple quantum well structure exhibited three decay components of 390 ps, 3.8 ns and 16 ns with the ratios of 28%, 29% and 43%, respectively. The total light output at 300 K was 11% of that of NaI:Tl.

Original languageEnglish
Title of host publication2005 IEEE Nuclear Science Symposium Conference Record -Nuclear Science Symposium and Medical Imaging Conference
Number of pages5
Publication statusPublished - 2005
EventNuclear Science Symposium Conference Record, 2005 IEEE - , Puerto Rico
Duration: 2005 Oct 232005 Oct 29

Publication series

NameIEEE Nuclear Science Symposium Conference Record
ISSN (Print)1095-7863


ConferenceNuclear Science Symposium Conference Record, 2005 IEEE
Country/TerritoryPuerto Rico


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