Br-substituent effect on photoluminescence and scintillation properties of (C6H5C2H4NH3)2PbCl4 perovskite-type compounds

被引：1
作者：
Matsuzawa, Shun [1 ]
Okazaki, Kai [1 ]
Nakauchi, Daisuke [1 ]
Kawano, Naoki [2 ]
Suto, Takeru [2 ]
Kato, Takumi [1 ]
Kawaguchi, Noriaki [1 ]
Yanagida, Takayuki [1 ]
机构：
[1] Nara Inst Sci & Technol NAIST, Div Mat Sci, 8916-5 Takayama Cho, Ikoma City, Nara 6300192, Japan
[2] Akita Univ, Grad Sch Engn Sci, 1-1 Tegatagakuen Machi, Akita, Akita 0108502, Japan
来源：
JOURNAL OF LUMINESCENCE | 2024年 / 270卷
基金：
日本学术振兴会;
关键词：
Scintillator; Phosphor; Organic-inorganic perovskites; Exciton; Quantum well; INORGANIC SCINTILLATORS; EMISSION; SECURITY; SYSTEMS; LYSO;
D O I：
10.1016/j.jlumin.2024.120547
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The photoluminescence and scintillation properties of n-bromophenethylammonium lead chloride ((nBrPEA)2PbCl4) (n = 4, 3, and 2) and phenethylammonium lead chloride ((PEA)2PbCl4) have been investigated. All the samples showed broad emission peaks at 400-700 nm upon excitation by UV light or X-ray. The decay time constants of 8-28 ns were obtained which originated from the recombination of self-trapped exciton (STE) within inorganic layers. The afterglow levels at 20 ms after 2 ms of X-ray irradiation of (4-BrPEA)2PbCl4 and (3BrPEA)2PbCl4 (76 and 55 ppm) were better than (PEA)2PbCl4 (379 ppm). The light yield of (4-BrPEA)2PbCl4 (3100 photons/5.5 MeV-alpha) was higher than (PEA)2PbCl4 (1400 photons/5.5 MeV-alpha).
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页数：6
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