Increased luminescence and improved decay kinetics in lithium and cerium co-doped yttrium aluminum garnet scintillators grown by the Czochralski method

被引：16

作者：

Dickens, Peter T. ^{[1
]}

Haven, Drew T. ^{[1
]}

Friedrich, Stephan ^{[2
]}

Saleh, Muad ^{[1
]}

Lynn, Kelvin G. ^{[1
]}

机构：

[1] Washington State Univ, Ctr Mat Res, Pullman, WA 99164 USA

[2] Lawrence Livermore Natl Lab, 7000 East Ave,L-188, Livermore, CA 94550 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2017年 / 121卷 / 12期

关键词：

THIN-FILM PHOSPHORS; X-RAY SPECTROMETER; ENHANCED LUMINESCENCE; LI+; PHOTOLUMINESCENCE;

D O I：

10.1063/1.4978376

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this study, four yttrium aluminum garnet single crystals co-doped with cerium and lithium were produced by the Czochralski method and the scintillation and defect properties were investigated. Our results demonstrated an increase in luminescence with Li co-doping as well as elimination of longer decay times. Surprisingly, although Li is monovalent, no oxidation of cerium from Ce3+ to Ce4+ was found as would be expected to maintain charge neutrality. Additionally, thermoluminescence results indicated a reduction in the trapping of charge carriers by shallow and deep traps, and room temperature photoluminescence measurements showed an improvement in the Ce3+ 5d to 4f transition efficiency. Published by AIP Publishing.

引用

页数：8

共 25 条

[1] Evidence and Consequences of Ce4+ in LYSO:Ce, Ca and LYSO:Ce, Mg Single Crystals for Medical Imaging Applications [J].

Blahuta, S. ;

Bessiere, A. ;

Viana, B. ;

Dorenbos, P. ;

Ouspenski, V. .

IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2013, 60 (04) :3134-3141

[2] The enhancement of luminescence in Co-doped cubic Eu2O3 using Li+ and Al3+ ions [J].

Chae, Ki-Woong ;

Park, Ta-Ryeong ;

Cheon, Chae Il ;

Cho, Nam In ;

Kim, Jeong Seog .

JOURNAL OF LUMINESCENCE, 2011, 131 (12) :2597-2605

[3] Enhanced luminescence induced by change of cerium oxidation states in Li-codoped Lu2SiO5:Ce3+ phosphors [J].

Chen, Shiwei ;

Liu, Xiaolin ;

Wu, Fei ;

Gu, Mu ;

Ni, Chen ;

Liu, Bo ;

Huang, Shiming ;

Zhang, Jing .

MATERIALS LETTERS, 2013, 100 :282-284

[4] Characterization and photoluminescent enhancement of Li+ corporation effect on CaWO4:Eu3+ phosphor [J].

Chen, Yeqing ;

Yang, Hyun Kyoung ;

Park, Sung Wook ;

Moon, Byung Kee ;

Choi, Byung Chun ;

Jeong, Jung Hyun ;

Kim, Kwang Ho .

JOURNAL OF ALLOYS AND COMPOUNDS, 2012, 511 (01) :123-128

[5]

Dhanaraj G.B.K., 2010, Springer Handbook of Crystal Growth, DOI DOI 10.1007/978-3-540-74761-1

[6] Mechanism of luminescent enhancement in Ba2GdNbO6:Eu3+ perovskite by Li+ co-doping [J].

dos Santos Rezende, Marcos Vinicius ;

Giroldo Valerio, Mario Ernesto ;

Mouta, Rodolpho ;

Diniz, Eduardo Moraes ;

de Araujo Paschoal, Carlos William .

JOURNAL OF LUMINESCENCE, 2015, 158 :75-80

[7] Band-gap engineering for removing shallow traps in rare-earth Lu3Al5O12 garnet scintillators using Ga3+ doping [J].

Fasoli, M. ;

Vedda, A. ;

Nikl, M. ;

Jiang, C. ;

Uberuaga, B. P. ;

Andersson, D. A. ;

McClellan, K. J. ;

Stanek, C. R. .

PHYSICAL REVIEW B, 2011, 84 (08)

[8] A multichannel superconducting soft x-ray spectrometer for high-resolution spectroscopy of dilute samples [J].

Friedrich, S ;

Funk, T ;

Drury, O ;

Labov, SE ;

Cramer, SP .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2002, 73 (03) :1629-1631

[9] A 36-pixel tunnel junction soft x-ray spectrometer for scintillator material science [J].

Friedrich, Stephan ;

Drury, Owen B. ;

Yuan, Shaopang ;

Szupryczynski, Piotr ;

Spurrier, Merry A. ;

Melcher, Charles L. .

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2007, 17 (02) :351-354

[10] Enhanced Ce3+ photoluminescence by Li+ co-doping in CaO phosphor and its use in blue-pumped white LEDs [J].

Hao, Zhendong ;

Zhang, Xia ;

Luo, Yongshi ;

Zhang, Ligong ;

Zhao, Haifeng ;

Zhang, Jiahua .

JOURNAL OF LUMINESCENCE, 2013, 140 :78-81

← 1 2 3 →