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Sensors and Materials, Volume 33, Number 6(4) (2021)
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pp. 2137-2145
S&M2600 Research Paper of Special Issue
https://doi.org/10.18494/SAM.2021.3314
Published: June 24, 2021

Effects of Excitation Density on the Scintillation Properties of Organic–Inorganic Layered Perovskite-type Compounds [PDF]

Masanori Koshimizu, Naoki Kawano, Atsushi Kimura, Satoshi Kurashima, Mitsumasa Taguchi, Yutaka Fujimoto, and Keisuke Asai

(Received January 27, 2021; Accepted April 12, 2021)

Keywords: scintillator, linear energy transfer, layered perovskite, Wannier exciton, quantum well

The scintillation properties of organic–inorganic layered perovskite-type compounds were analyzed using pulsed beams having different linear energy transfers (LETs). Initially the decay was slower and then became faster at higher LETs. A possible cause of the slower decay at higher LETs is the competition between the radiative process and trapping at nonradiative sites, resulting in some excitons not being trapped at nonradiative sites at which other excitons have already been trapped at higher LETs. The faster decay at higher LETs is attributed to the interaction of excited states, such as biexciton formation or a nonradiative Auger process. In addition, the LET dependence was most pronounced for (C6H5C2H4NH3)2PbBr4, whose radiative rate and luminescence quantum efficiency were the highest among the investigated compounds. This result is because the radiative process in this compound, as a major decay process, is more significantly influenced by excited state interactions at higher LETs.

Corresponding author: Masanori Koshimizu

This work is licensed under a Creative Commons Attribution 4.0 International License.

Cite this article
Masanori Koshimizu, Naoki Kawano, Atsushi Kimura, Satoshi Kurashima, Mitsumasa Taguchi, Yutaka Fujimoto, and Keisuke Asai, Effects of Excitation Density on the Scintillation Properties of Organic–Inorganic Layered Perovskite-type Compounds, Sens. Mater., Vol. 33, No. 6, 2021, p. 2137-2145.