Hydrothermal Synthesis and Vacuum Ultraviolet-Excited Luminescence Properties of Novel Dy3+-doped GdPO4 White Light Phosphors
HAN Guo-Cai1, WANG Yu-Hua1,2, WU Chun-Fang1, ZHANG Jia-Chi1, LU Yang-Hua3
1Department of Material Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 7300002Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 7300003Shenzhen Star Optoelectronic Technology Co., Ltd, Shenzhen 518100
Hydrothermal Synthesis and Vacuum Ultraviolet-Excited Luminescence Properties of Novel Dy3+-doped GdPO4 White Light Phosphors
HAN Guo-Cai1, WANG Yu-Hua1,2, WU Chun-Fang1, ZHANG Jia-Chi1, LU Yang-Hua3
1Department of Material Science, School of Physical Science and Technology, Lanzhou University, Lanzhou 7300002Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 7300003Shenzhen Star Optoelectronic Technology Co., Ltd, Shenzhen 518100
摘要Novel Dy3+-doped GdPO4 white light phosphors with a monoclinic system are successfully synthesized by the hydrothermal method at 240°C. The strong absorption at around 147nm in the excitation spectrum is assigned to the host absorption. It is suggested that the vacuum ultraviolet excited energy is transferred from the host to the Dy3+ ions. The f-d transition of the Dy3+ ion is observed to be located at 182nm, which is consistent with the calculated value using Dorenbos's expression. Under 147nm excitation, Gd0.92PO4:0.08Dy3+ phosphor exhibits two emission bands located at 572nm (yellow) and 478nm (blue), which correspond to the hypersensitive transitions 4F9/2-6H13/2 and 4F9/2-6H15/2. The two emission bands lead to the white light. Because of the strong absorption at about 147nm, Gd0.92PO4:0.08Dy3+ under vacuum ultraviolet excitation is an effective white light phosphor, and has promising applications to mercury-free lamps.
Abstract：Novel Dy3+-doped GdPO4 white light phosphors with a monoclinic system are successfully synthesized by the hydrothermal method at 240°C. The strong absorption at around 147nm in the excitation spectrum is assigned to the host absorption. It is suggested that the vacuum ultraviolet excited energy is transferred from the host to the Dy3+ ions. The f-d transition of the Dy3+ ion is observed to be located at 182nm, which is consistent with the calculated value using Dorenbos's expression. Under 147nm excitation, Gd0.92PO4:0.08Dy3+ phosphor exhibits two emission bands located at 572nm (yellow) and 478nm (blue), which correspond to the hypersensitive transitions 4F9/2-6H13/2 and 4F9/2-6H15/2. The two emission bands lead to the white light. Because of the strong absorption at about 147nm, Gd0.92PO4:0.08Dy3+ under vacuum ultraviolet excitation is an effective white light phosphor, and has promising applications to mercury-free lamps.
[1] Zhang J C and Wang Y H 2008 Chin. Phys. Lett. 25 1453 [2] Li P L, Wang Z J, Yang Z P and Guo Q L 2009 Chin.Phys. Lett. 26 047801 [3] Liang X L, Zhu C F, Yang Y X, Yuan S L and Chen G R 2008 J. Lumin. 128 1162 [4] Xiu Z L, Yang Z S, L\"{U M K, Liu S W, Zhang H P and ZhouG J 2006 Opt. Mater. 29 431 [5] Su X Q and Yan B 2005 Mater. Chem. Phys. 93552 [6] Wang Y H, Wu C F and Wei J 2007 J. Lumin. 126503 [7] Li Y and Hong G 2005 J. Lumin. 26 587 [8] J\"{ustel T, Krupa J C and Wiechert D U 2001 J.Lumin. 93 179 [9] Saito S, Wada K and Onaka R 1974 J. Phys. Soc. Jpn. 37 711 [10] Nakazawa E and Shiga F 1977 J. Lumin. 15 225 [11] Wu C F and Wang Y H 2008 Electrochem. Solid-StateLett. 11 J9 [12] Dorenbos P 2000 J. Lumin. 91 91 [13] Yang H C, Li C Y, He H, Tao Y, Xu J H and Su Q 2006 J. Lumin. 118 61 [14] Su Q, Liang H B, Li C Y, He H, Lu Y H, Li J and Tao Y2007 J. Lumin. 122--123 927 [15] He H, Liang H B, Wang S B, Su Q, Tao Y, Ju X and Hou X Y2002 Nucl. Tech. 25 783 [16] Zhang J P, Liang H B, Han B, Tian Z F and Su Q 2008 Opt. Express 16 7508 [17] Li Y C, Chang Y H, Lin Y F, Chang Y S and Lin Y J 2007 J. Alloys Compounds 439 367 [18] Bao A, Yang H, Tao C Y, Zhang Y and Han L L 2006 J.Lumin. 128 60 [19] Chen L M, Liu G C, Liu Y N and Huang K L 2008 J.Mater. Proc. Technol. 198 129 [20] Mini K K, Anoop G and Jayaraj M K 2007 J.Electrochem. Soc. 154 J310
2009, Vol. 26 
