Xinlong Yan , Chen Peng , Weimin He , Weiheng Duan , Yi Lu , Kan Zhang , Yuzhen Jia , Ruichen Wang , Weihu Yang , Shiguo Liu , Hetong Han , Zhaohui Song , Fan Yang
{"title":"Radiation induced light output enhancement of CsPbCl3 crystal","authors":"Xinlong Yan , Chen Peng , Weimin He , Weiheng Duan , Yi Lu , Kan Zhang , Yuzhen Jia , Ruichen Wang , Weihu Yang , Shiguo Liu , Hetong Han , Zhaohui Song , Fan Yang","doi":"10.1016/j.jlumin.2025.121162","DOIUrl":null,"url":null,"abstract":"<div><div>Generally, the light output (LO) of scintillators decreases after the gamma-ray irradiation. However, the LO enhancement is observed in CsPbCl<sub>3</sub> crystals after gamma-rays irradiation at doses of 10<sup>2</sup>, 10<sup>3</sup>, 10<sup>4</sup> and 10<sup>5</sup> rad. A new luminescence band around 580 nm with a decay time of 12 μs is observed after the irradiation. Its intensity depends on the integrated dose of irradiation. A positive correlation between its intensity and LO is observed, illustrating the LO enhancement can be attributed to the new luminescence band. The absorption wavelength of radiation induced color centers at 2.84 eV is consistent with the excitation wavelength of the new luminescence band. There is a positive correlation between the concentration of color centers at 2.84 eV and the intensity of the new luminescence band. It indicates the new luminescence band is attributed to the luminescence of radiation induced color centers. Considering the high mobility of Cl<sup>−</sup> ions in the CsPbCl<sub>3</sub> crystal, it is speculated the radiation induced color centers may be vacancies of Cl<sup>−</sup> ions. The intensity of the new luminescence band decreases with time, which is attributed to the annihilation of radiation induced color centers at room temperature. The study provides valuable insights into the performance of CsPbCl<sub>3</sub> crystal under high irradiation. It also explains the abnormal LO enhancement in CsPbCl<sub>3</sub> crystals after gamma-ray irradiations, which may be useful to understand the defects of inorganic halide perovskite crystals.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"281 ","pages":"Article 121162"},"PeriodicalIF":3.3000,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Luminescence","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0022231325001024","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Generally, the light output (LO) of scintillators decreases after the gamma-ray irradiation. However, the LO enhancement is observed in CsPbCl3 crystals after gamma-rays irradiation at doses of 102, 103, 104 and 105 rad. A new luminescence band around 580 nm with a decay time of 12 μs is observed after the irradiation. Its intensity depends on the integrated dose of irradiation. A positive correlation between its intensity and LO is observed, illustrating the LO enhancement can be attributed to the new luminescence band. The absorption wavelength of radiation induced color centers at 2.84 eV is consistent with the excitation wavelength of the new luminescence band. There is a positive correlation between the concentration of color centers at 2.84 eV and the intensity of the new luminescence band. It indicates the new luminescence band is attributed to the luminescence of radiation induced color centers. Considering the high mobility of Cl− ions in the CsPbCl3 crystal, it is speculated the radiation induced color centers may be vacancies of Cl− ions. The intensity of the new luminescence band decreases with time, which is attributed to the annihilation of radiation induced color centers at room temperature. The study provides valuable insights into the performance of CsPbCl3 crystal under high irradiation. It also explains the abnormal LO enhancement in CsPbCl3 crystals after gamma-ray irradiations, which may be useful to understand the defects of inorganic halide perovskite crystals.
期刊介绍：
The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid.
We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.
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