VUV Luminescent Properties of Rare Earth Fluorides and Borates

YOU Fang-Tian; YANG Zhi; LU Pei-Chao; WANG Ying-Xia; LIN Jian-Hua; TAO Ye

Chinese Physics C> 2001, Vol. 25> Issue(S1) : 70-74

VUV Luminescent Properties of Rare Earth Fluorides and Borates

State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing 100039,China2 Institute of High Energy Physics,CAS,Beijing 100871,China

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The quantum cutting effect was observed in Eu³⁺ doped hexagonal NaGdF₄.Upon VUV excitation to the ⁶G_J level of Gd³⁺,two red photons are emitted by Eu³⁺ through an efficient two-step energy transfer process.The quantum efficiency of this material is about 160%.Cubic NaGdF₄ contains considerable amount of oxygen impurity,so that the 4f-5d transition moves to lower energy(177nm),which fits the energy of the VUV photons from discharge of inert gas; the color purity of the emission of cubic NaGdF₄ is also improved by oxygen doping.The photon cascade emission of Gd³⁺ ions was observed in GdBaB₉O₁₆.Under the 202 nm excitation,a red and a near infrared radiative transition from ⁶G_J states,⁶G_J→⁶I_J and ⁶G_J→⁶P_J occur followed by an ultraviolet emission of ⁶P_J→⁸S_7/2.

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YOU Fang-Tian, YANG Zhi, LU Pei-Chao, WANG Ying-Xia, LIN Jian-Hua and TAO Ye. VUV Luminescent Properties of Rare Earth Fluorides and Borates[J]. Chinese Physics C, 2001, 25(S1): 70-74.

YOU Fang-Tian, YANG Zhi, LU Pei-Chao, WANG Ying-Xia, LIN Jian-Hua and TAO Ye. VUV Luminescent Properties of Rare Earth Fluorides and Borates[J]. Chinese Physics C, 2001, 25(S1): 70-74. shu

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沈阳化工大学材料科学与工程学院沈阳 110142

VUV Luminescent Properties of Rare Earth Fluorides and Borates

Corresponding author: YOU Fang-Tian,

State Key Laboratory of Rare Earth Materials Chemistry and Applications,College of Chemistry and Molecular Engineering,Peking University,Beijing 100039,China2 Institute of High Energy Physics,CAS,Beijing 100871,China

Received Date: 1900-01-01

Accepted Date: 1900-01-01

Available Online: 2001-06-22

Abstract: The quantum cutting effect was observed in Eu³⁺ doped hexagonal NaGdF₄.Upon VUV excitation to the ⁶G_J level of Gd³⁺,two red photons are emitted by Eu³⁺ through an efficient two-step energy transfer process.The quantum efficiency of this material is about 160%.Cubic NaGdF₄ contains considerable amount of oxygen impurity,so that the 4f-5d transition moves to lower energy(177nm),which fits the energy of the VUV photons from discharge of inert gas; the color purity of the emission of cubic NaGdF₄ is also improved by oxygen doping.The photon cascade emission of Gd³⁺ ions was observed in GdBaB₉O₁₆.Under the 202 nm excitation,a red and a near infrared radiative transition from ⁶G_J states,⁶G_J→⁶I_J and ⁶G_J→⁶P_J occur followed by an ultraviolet emission of ⁶P_J→⁸S_7/2.

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VUV Luminescent Properties of Rare Earth Fluorides and Borates

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