Correlation of emission, scintillation and charge trapping properties in Cs2HfCl6 and Cs2ZrCl6 single crystals

被引:30
作者
Buryi, Maksym [1 ]
Babin, Vladimir [1 ]
Ligthart, Rian A. M. [2 ]
Nagorny, Serge S. [3 ,4 ]
Mikhailik, Vitaliy B. [5 ]
Vanecek, Vojtech [1 ,6 ]
Prouzova Prochazkova, Lenka [1 ,6 ]
Kandel, Ramjee [4 ,7 ]
Nahorna, Viktoriia V. [4 ,7 ]
Wang, Peng [4 ,7 ]
机构
[1] Czech Acad Sci, Inst Phys, Cukrovarnicka 10-112, Prague 16200, Czech Republic
[2] Univ Utrecht, Debye Inst Nanomat Sci, Princetonpl 1, NL-3584 CC Utrecht, Netherlands
[3] Queens Univ Kingston, Dept Phys Engn Phys & Astronomy, Kingston, ON K7L 3N6, Canada
[4] Queens Univ, Arthur B McDonald Canadian Astroparticle Phys Res, Dept Phys Engn Phys & Astron, Kingston, ON K7L 3N6, Canada
[5] Diamond Light Source, Harwell Campus, Didcot OX11 0DE, Oxon, England
[6] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Brehova 7, Prague 11519, Czech Republic
[7] Queens Univ Kingston, Chem Dept, Kingston, ON K7L 3N6, Canada
关键词
LUMINESCENCE; ELECTRON; DEFECTS; CAWO4; CONTAMINATION; RESONANCE; COMPLEX; ALPHA;
D O I
10.1039/d0tc05482h
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Cs2HfCl6 (CHC) and Cs2ZrCl6 (CZC) single crystals were grown by a vertical Bridgman method. Luminescence and charge trapping properties were studied in CHC crystals by the correlated measurements of electron paramagnetic resonance (EPR), radioluminescence (RL) and thermally stimulated luminescence (TSL) techniques. CZC crystals were studied by the same set of measurements in order to find correlations between CHC and CZC crystals. EPR spectra measured before and after X-ray irradiation in both CHC and CZC samples were attributed with the typical signals of the V-k(a) hole trapping center (Cl-2(-) pseudomolecular ion), which has recently been reported though the magnitude of the signal was much smaller in the CZC crystal. Besides the V-k(a) signal, another spectrum was observed in both samples; however, its intensity was at a very low level. It has been tentatively ascribed to the complex HCl-related hole trapping center. TSL glow curves measured in both CHC and CZC samples within the 10-500 K temperature range were composed of 6-8 complex peaks. The dominating peak at about 100-120 K originates from the de-trapping of holes at the V-k(a) trapping center. Scintillation characteristics of CHC crystal were studied over the temperature range of 9-295 K. Scintillation decay curves were fitted by three components. The CHC crystal demonstrated a much similar light yield of ca. 20 500 ph per MeV at room temperature and 9 K. The temperature dependence of the scintillation light output exhibits an unusual s-shaped character with the drop at around 100 K that correlates well with the decrease in the V-k(a) EPR signal, evidencing detrapping of holes trapped at the V-k(a) center in the CHC crystal. Therefore, the V-k(a) center was assumed to be the part of Hf3+-Cl-2(-) self-trapped exciton (STE) that participates in the emission above 100 K becoming "frozen" below 100 K. RL and TSL spectra were complex in the CHC sample composed of two and three overlapping bands, respectively. One of the components peaking at 2.65 eV originated from the Zr-related STE.
引用
收藏
页码:2955 / 2968
页数:14
相关论文
共 40 条
[21]   Carrier Self-trapping and Luminescence in Intrinsically Activated Scintillator: Cesium Hafnium Chloride (Cs2HfCl6) [J].
Kang, By ;
Biswas, Koushik .
JOURNAL OF PHYSICAL CHEMISTRY C, 2016, 120 (22) :12187-12195
[22]   THE ELECTRONIC STRUCTURE OF AN H-CENTER [J].
KANZIG, W ;
WOODRUFF, TO .
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1958, 9 (01) :70-&
[23]   Luminescence and Charge Trapping in Cs2HfCl6 Single Crystals: Optical and Magnetic Resonance Spectroscopy Study [J].
Kral, R. ;
Babin, V. ;
Mihokova, E. ;
Buryi, M. ;
Laguta, V. V. ;
Nitsch, K. ;
Nikl, M. .
JOURNAL OF PHYSICAL CHEMISTRY C, 2017, 121 (22) :12375-12382
[24]   Multiple photon counting coincidence (MPCC) technique for scintillator characterisation and its application to studies of CaWO4 and ZnWO4 scintillators [J].
Kraus, H ;
Mikhailik, VB ;
Wahl, D .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2005, 553 (03) :522-534
[25]   Crystal growth and scintillation performance of Cs2HfCl6 and Cs2HfCl4Br2 [J].
Lam, Stephanie ;
Guguschev, Christo ;
Burger, Arnold ;
Hackett, Maria ;
Motakef, Shariar .
JOURNAL OF CRYSTAL GROWTH, 2018, 483 :121-124
[26]  
McKeever S.W., 1983, Thermoluminescence of Solids, DOI [10.1017/CBO9780511564994, DOI 10.1017/CBO9780511564994.004]
[27]  
Mikhailik VB, 2010, J PHYS STUD, V14
[28]   HYDROGEN DEFECTS FROM UV PHOTO-DISSOCIATION OF OH- CENTERS IN ALKALI-HALIDES [J].
MORATO, SP ;
LUTY, F .
PHYSICAL REVIEW B, 1980, 22 (10) :4980-4991
[29]   Characterization of CaWO4 scintillator at room and liquid nitrogen temperatures [J].
Moszynski, M ;
Balcerzyk, M ;
Czarnacki, W ;
Nassalski, A ;
Szczesniak, T ;
Kraus, H ;
Mikhailik, VB ;
Solskii, IM .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2005, 553 (03) :578-591
[30]   Bright and fast scintillations of an inorganic halide perovskite CsPbBr3 crystal at cryogenic temperatures [J].
Mykhaylyk, V. B. ;
Kraus, H. ;
Kapustianyk, V. ;
Kim, H. J. ;
Mercere, P. ;
Rudko, M. ;
Da Silva, P. ;
Antonyak, O. ;
Dendebera, M. .
SCIENTIFIC REPORTS, 2020, 10 (01)