Thermal quenching, cathodoluminescence and thermoluminescence study of Eu2+ doped CaS powder

被引：33

作者：

Nyenge, R. L. ^{[1
,2
]}

Swart, H. C. ^{[1
]}

Poelman, D. ^{[3
,4
]}

Smet, P. F. ^{[3
,4
]}

Martin, L. I. D. J. ^{[3
,4
]}

Noto, L. L. ^{[1
]}

Som, S. ^{[1
]}

Ntwaeaborwa, O. M. ^{[1
]}

机构：

[1] Univ Orange Free State, Dept Phys, ZA-9300 Bloemfontein, South Africa

[2] Kenyatta Univ, Dept Phys, Nairobi, Kenya

[3] Univ Ghent, Dept Solid State Sci, LumiLab, B-9000 Ghent, Belgium

[4] Univ Ghent, Ctr Nano & Biophoton, B-9000 Ghent, Belgium

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 657卷

基金：

新加坡国家研究基金会;

关键词：

Calcium sulfide; Thermal quenching; Thermoluminescence; Cathodoluminescence; FILM ELECTROLUMINESCENT DEVICES; CALCIUM SULFIDE PHOSPHORS; RED-EMITTING PHOSPHOR; PERSISTENT LUMINESCENCE; CAMOO4; PHOSPHORS; MECHANISM; DY3+; PHOTOLUMINESCENCE; FLUORESCENCE; SPECTROSCOPY;

D O I：

10.1016/j.jallcom.2015.10.143

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In order to determine the suitability of Eu2+ doped CaS for phosphor-converted light emitting diodes, photoluminescence, cathodoluminescence mapping, thermal quenching of luminescence and thermoluminescence studies of this phosphor were carried out. Thermal quenching in CaS:Eu2+ is ascribed to energy transfer to impurities and to electrons activated to the conduction band states. The decay time of Eu2+ was partially influenced by oxygen impurities present in the phosphor. Persistent luminescence was observed, originating from trapping and detrapping of electrons by the sulfur or oxygen ion vacancies. The kinetic parameters of the persistent luminescence, namely activation energy (E) and order of kinetics of gamma-irradiated CaS:Eu2+ were determined using initial rise and repeated dose methods, respectively. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：787 / 793

页数：7

共 44 条

[1] ROLE OF EU-2+ LUMINESCENT CENTERS IN THE ELECTROOPTICAL CHARACTERISTICS OF RED-EMITTING CAS-EU THIN-FILM ELECTROLUMINESCENT DEVICES WITH MEMORY [J].

ANDO, M ;

ONO, YA .

JOURNAL OF APPLIED PHYSICS, 1990, 68 (07) :3578-3583

[2] TEMPERATURE EFFECTS IN THE EMISSION CHARACTERISTICS OF CASEU THIN-FILM ELECTROLUMINESCENT DEVICES [J].

ANDO, M ;

ONO, YA .

JOURNAL OF CRYSTAL GROWTH, 1992, 117 (1-4) :969-974

[3] Microencapsulation of Moisture-Sensitive CaS:Eu2+ Particles with Aluminum Oxide [J].

Avci, N. ;

Musschoot, J. ;

Smet, P. F. ;

Korthout, K. ;

Avci, A. ;

Detavernier, C. ;

Poelman, D. .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2009, 156 (11) :J333-J337

[4]

BLASSE G, 1968, PHILIPS RES REP, V23, P189

[5]

Blasse G, 1994, LUMINESCENCE MAT, P66

[6] Photoluminescence of Eu2+ in SrGa2S4 [J].

Chartier, C ;

Barthou, C ;

Benalloul, P ;

Frigerio, JM .

JOURNAL OF LUMINESCENCE, 2005, 111 (03) :147-158

[7] Eu2+-activated silicon-oxynitride Ca3Si2O4N2: a green-emitting phosphor for white LEDs [J].

Chiu, Yi-Chen ;

Huang, Chien-Hao ;

Lee, Te-Ju ;

Liu, Wei-Ren ;

Yeh, Yao-Tsung ;

Jang, Shyue-Ming ;

Liu, Ru-Shi .

OPTICS EXPRESS, 2011, 19 (10) :A331-A339

[8] Argon ions induced thermoluminescence properties of Ba0.12Sr0.88SO4 phosphor [J].

Choubey, A. ;

Sharma, S. K. ;

Lochab, S. P. ;

Kanjilal, D. .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 2011, 72 (02) :136-143

[9] LUMINESCENCE OF EU-2+ IN STRONTIUM AND BARIUM THIOGALLATES [J].

DAVOLOS, MR ;

GARCIA, A ;

FOUASSIER, C ;

HAGENMULLER, P .

JOURNAL OF SOLID STATE CHEMISTRY, 1989, 83 (02) :316-323

[10] Thermal quenching of Eu2+ 5d-4f luminescence in inorganic compounds [J].

Dorenbos, P .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (50) :8103-8111

← 1 2 3 4 5 →