Growth and Thermo-luminescence Properties of Dy: Bi4Si3O12 Crystals

doi:10.15541/jim20160221

Abstract

Abstract:

Dy³⁺ doped Bi₄Si₃O₁₂ (BSO) crystals were grown by the vertical Bridgman method with doping contents of 0.1mol%, 0.2mol%, 0.3mol%, 2mol%, 3mol% and 4 mol%. It was found that the crystallization behavior was modified by heavy doping and the surface precipitated phase disappeared gradually with the dopant content increase. The maximum light yield of the BSO crystals doped with 0.1mol% Dy³⁺was up to 145% of that of pure BSO. The thermo-luminescence (TL) spectra showed that the intensity of TL peaks increased slightly and Dy³⁺doping is helpful to light yield when doping content is less than 0.3mol%. However, it induced more defects when the dopant content was larger than 2mol%. High doping may lead to competitive luminescence between Dy³⁺ ions and Bi³⁺ ions, resulting in decrease of light yield.

Key words: Bi₄Si₃O₁₂, crystal growth, Dy³⁺ doping, thermoluminescence, light yield

CLC Number:

TQ174

WANG Mei-Ling, XU Jia-Yue, ZHANG Yan, CHU Yao-Qing, YANG Bo-Bo, SHEN Hui, TIAN Tian. Growth and Thermo-luminescence Properties of Dy: Bi₄Si₃O₁₂ Crystals[J]. Journal of Inorganic Materials, 2016, 31(10): 1068-1072.

Figures/Tables 5

References 15

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Sample/peak		FWHM	T_m/K	C₁	C₂	E₁/eV	E₂/eV	s₁/s^-1	s₂/s^-1	τ₁/s	τ₂/s
Pure BSO	Peak 1	39.5061	380.13	2.52	3.54	0.73	8.81	4.84E+9	5.71E+116	9.49	0.78
	Peak 2	53.7592	462.83	2.52	3.54	0.79	13.08	2.74E+8	2.11E+142	13.06	0.78
	Peak 3	56.0264	523.71	2.52	3.54	0.97	16.76	1.70E+9	1.40E+161	13.50	0.78
	Peak 4	33.8480	622.54	2.52	3.54	2.38	23.70	2.33E+18	5.01E+191	7.80	0.78
0.1mol% doped	Peak 1	64.6495	378.83	2.52	3.54	0.42	8.75	2.12E+4	2.26E+116	16.49	0.78
	Peak 2	90.8081	469.26	2.52	3.54	0.45	13.44	2589.01	2.06E+144	23..65	0.78
	Peak 3	169.3242	572.53	2.52	3.54	0.32	20.04	13.92	1.73E+176	48.78	0.78
	Peak 4	54.7902	620.69	2.52	3.54	1.42	23.56	2.61E+10	1.34 E+191	13.00	0.78
2mol% doped	Peak 1	69.3833	386.71	2.52	3.54	0.40	9.12	9.55 E+3	6.16E+118	17.84	0.78
	Peak 2	36.0224	428.42	2.52	3.54	1.03	11..20	1.65E+11	4.85E+131	8.51	0.78
	Peak 3	146.3480	539.56	2.52	3.54	0.34	17.79	35.67	1.11E+166	41.11	0.78
	Peak 4	78.8523	642.55	2.52	3.54	1.03	25.25	5.82 E+6	7.73 E+197	19.26	0.78
4mol% doped	Peak 1	39.5061	370.96	2.52	3.54	0.69	8.39	2.69E+8	8.32E+113	9.51	0.78
	Peak 2	53.7591	427.32	2.52	3.54	0.66	11.14	5.14E+6	2.22E+131	13.17	0.78
	Peak 3	56.0264	521.32	2.52	3.54	0.96	16.60	1.53E+8	2.56E+160	13.50	0.78
	Peak 4	33.8480	636.97	2.52	3.54	2.50	24.81	6.84E+18	1.45E+196	7.79	0.78

Sample/peak		FWHM	T_m/K	C₁	C₂	E₁/eV	E₂/eV	s₁/s^-1	s₂/s^-1	τ₁/s	τ₂/s
Pure BSO	Peak 1	39.5061	380.13	2.52	3.54	0.73	8.81	4.84E+9	5.71E+116	9.49	0.78
	Peak 2	53.7592	462.83	2.52	3.54	0.79	13.08	2.74E+8	2.11E+142	13.06	0.78
	Peak 3	56.0264	523.71	2.52	3.54	0.97	16.76	1.70E+9	1.40E+161	13.50	0.78
	Peak 4	33.8480	622.54	2.52	3.54	2.38	23.70	2.33E+18	5.01E+191	7.80	0.78
0.1mol% doped	Peak 1	64.6495	378.83	2.52	3.54	0.42	8.75	2.12E+4	2.26E+116	16.49	0.78
	Peak 2	90.8081	469.26	2.52	3.54	0.45	13.44	2589.01	2.06E+144	23..65	0.78
	Peak 3	169.3242	572.53	2.52	3.54	0.32	20.04	13.92	1.73E+176	48.78	0.78
	Peak 4	54.7902	620.69	2.52	3.54	1.42	23.56	2.61E+10	1.34 E+191	13.00	0.78
2mol% doped	Peak 1	69.3833	386.71	2.52	3.54	0.40	9.12	9.55 E+3	6.16E+118	17.84	0.78
	Peak 2	36.0224	428.42	2.52	3.54	1.03	11..20	1.65E+11	4.85E+131	8.51	0.78
	Peak 3	146.3480	539.56	2.52	3.54	0.34	17.79	35.67	1.11E+166	41.11	0.78
	Peak 4	78.8523	642.55	2.52	3.54	1.03	25.25	5.82 E+6	7.73 E+197	19.26	0.78
4mol% doped	Peak 1	39.5061	370.96	2.52	3.54	0.69	8.39	2.69E+8	8.32E+113	9.51	0.78
	Peak 2	53.7591	427.32	2.52	3.54	0.66	11.14	5.14E+6	2.22E+131	13.17	0.78
	Peak 3	56.0264	521.32	2.52	3.54	0.96	16.60	1.53E+8	2.56E+160	13.50	0.78
	Peak 4	33.8480	636.97	2.52	3.54	2.50	24.81	6.84E+18	1.45E+196	7.79	0.78

Sample	Relative light yield
CsI(Tl)	100.00%
BSO	4.96%
BSO: 0.1mol% Dy₂O₃	7.21%
BSO: 0.2mol% Dy₂O₃	6.87%
BSO: 0.3mol% Dy₂O₃	6.76%
BSO: 2mol% Dy₂O₃	3.75%
BSO: 3mol% Dy₂O₃	2.87%
BSO: 4mol% Dy₂O₃	2.21%

Sample	Relative light yield
CsI(Tl)	100.00%
BSO	4.96%
BSO: 0.1mol% Dy₂O₃	7.21%
BSO: 0.2mol% Dy₂O₃	6.87%
BSO: 0.3mol% Dy₂O₃	6.76%
BSO: 2mol% Dy₂O₃	3.75%
BSO: 3mol% Dy₂O₃	2.87%
BSO: 4mol% Dy₂O₃	2.21%

Growth and Thermo-luminescence Properties of Dy: Bi₄Si₃O₁₂ Crystals

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