JOURNAL OF MOLECULAR STRUCTURE
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2022
·
IF 3.841
Renping Cao,Yunfei Zheng,Ting Chen,Bang Lan,Lan Li,Qinghu Zhong,Shuijing Nie,Jing Wang
In this work, Ca 3 MgSi 2 O 8 :R ( R = Dy 3+ , Eu 3+ , and Eu 3+ /Dy 3+ ) phosphors are synthesized in air by using the high-emperature solid-state reaction method. The crystal phase, crystal structures, lifetimes, and luminescence properties are investigated. Ca 3 MgSi 2 O 8 :Eu 3+ phosphor with excitation at 394 nm emits red-orange light and its emission spectrum covers the region from 575 nm to 720 nm due to the 5 D 0 → 7 F 0 , 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 transitions of Eu 3+ ion. Ca 3 MgSi 2 O 8 :Dy 3+ phosphor under excitation at 350 nm exhibits yellow-green emission with four emission bands in the range of 460–500 nm, 550–600 nm, 650–680 nm, and 740–775 nm, which are attribuited to the 4 F 9/2 → 6 H 15/2 , 6 H 13/2 , 6 H 11/2 , and 6 H 9/2 transitions of Dy 3+ ion, respectively. The energy transfer from Dy 3+ to Eu 3+ ions in Ca 3 MgSi 2 O 8 :Eu 3+ , Dy 3+ phosphor can be confirmed by the spectral properties. The tunable emission properties of Ca 3 MgSi 2 O 8 :Eu 3+ , Dy 3+ phosphor from yellow-green to red-orange can be fulfilled by the change of the excitation wavelength or the concentration proportion between Dy 3+ and Eu 3+ ions. The luminous mechanism and energy transfer of Ca 3 MgSi 2 O 8 :Eu 3+ , Dy 3+ phosphor are explained by the energy level diagrams of Eu 3+ and Dy 3+ ions.
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 22
·26620-26630
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IF 2.478
Cao Renping,Liu Na,Zhong Qinghu,Tu Yafang,Xu Yongchun,Zhang Haining,Luo Wei,Chen Ting
In this work, Ca 3 MgSi 2 O 8 :Bi 3+ , Ca 3 MgSi 2 O 8 : x Eu 3+ ( x = 0, 2, 4, 6, 8, and 10 mol%), and Ca 3 MgSi 2 O 8 :6%Eu 3+ , yBi 3+ ( y = 2, 4, 6, 8, and 10 mol%) phosphors are prepared via the high-temperature solid-state reaction method in air. Their crystal structure and luminescence properties are studied. The excitation spectrum with two peaks at ~ 250 and 320 nm of Ca 3 MgSi 2 O 8 :Bi 3+ phosphor can be observed in the range of 225–380 nm because of the 1 S 0 → 1 P 1 and 3 P 1 transitions, and its emission spectrum peaking at ~ 410 nm is in the region from 340 to 650 nm owing to the 3 P 1,0 → 1 S 0 transition of Bi 3+ ion. The excitation spectrum of Ca 3 MgSi 2 O 8 :Eu 3+ phosphor in the range of 220–550 nm is found owing to the f – f transition of Eu 3+ ion, and its emission spectrum under excitation at 394 nm includes five emission spectral bands in the region from 575 to 720 nm due to the 5 D 0 → 7 F 0 , 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 transitions of Eu 3+ ion. The luminous performance improvement of Ca 3 MgSi 2 O 8 :Eu 3+ phosphor via co-doping Bi 3+ ions is investigated. The emission spectra of Ca 3 MgSi 2 O 8 :Eu 3+ , Bi 3+ phosphor under excitation at 320 and 394 nm mainly come from the 5 D 0 → 7 F 0 , 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 transitions of Eu 3+ ion due to energy transfer from Bi 3+ to Eu 3+ ions. We observe the tunable emission properties of Ca 3 MgSi 2 O 8 :Eu 3+ , Bi 3+ phosphor and use the energy level diagrams of Bi 3+ and Eu 3+ ions to explain the luminous mechanism. The results infer that Ca 3 MgSi 2 O 8 :Eu 3+ , Bi 3+ phosphor has application prospect in white light-emitting diode excited by near ultraviolet light.
研究领域:
材料科学
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无机化学
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光学材料
·
固体物理
·
发光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）