Luminescence properties and tunable emission of Ca3MgSi2O8:Eu3+, Bi3+ phosphor with Bi3+ → Eu3+ energy transfer.

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Title:	Luminescence properties and tunable emission of Ca3MgSi2O8:Eu³⁺, Bi³⁺ phosphor with Bi³⁺ → Eu³⁺ energy transfer.
Authors:	Cao, Renping^1,2 (AUTHOR) jxcrp@163.com, Liu, Na² (AUTHOR), Zhong, Qinghu¹ (AUTHOR), Tu, Yafang² (AUTHOR), Xu, Yongchun² (AUTHOR), Zhang, Haining¹ (AUTHOR), Luo, Wei¹ (AUTHOR), Chen, Ting¹ (AUTHOR) 764042609@qq.com
Source:	Journal of Materials Science: Materials in Electronics. Nov2021, Vol. 32 Issue 22, p26620-26630. 11p.
Subjects:	Energy transfer, Luminescence, Phosphors, Excitation spectrum, Ion energy, Calcium ions, Oxygen
Abstract:	In this work, Ca3MgSi2O8:Bi3+, Ca3MgSi2O8:xEu3+ (x = 0, 2, 4, 6, 8, and 10 mol%), and Ca3MgSi2O8:6%Eu3+, yBi3+ (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 Ca3MgSi2O8:Bi3+ phosphor can be observed in the range of 225–380 nm because of the 1S0 → 1P1 and 3P1 transitions, and its emission spectrum peaking at ~ 410 nm is in the region from 340 to 650 nm owing to the 3P1,0 → 1S0 transition of Bi3+ ion. The excitation spectrum of Ca3MgSi2O8:Eu3+ phosphor in the range of 220–550 nm is found owing to the f–f transition of Eu3+ 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 5D0 → 7F0, 7F1, 7F2, 7F3, and 7F4 transitions of Eu3+ ion. The luminous performance improvement of Ca3MgSi2O8:Eu3+ phosphor via co-doping Bi3+ ions is investigated. The emission spectra of Ca3MgSi2O8:Eu3+, Bi3+ phosphor under excitation at 320 and 394 nm mainly come from the 5D0 → 7F0, 7F1, 7F2, 7F3, and 7F4 transitions of Eu3+ ion due to energy transfer from Bi3+ to Eu3+ ions. We observe the tunable emission properties of Ca3MgSi2O8:Eu3+, Bi3+ phosphor and use the energy level diagrams of Bi3+ and Eu3+ ions to explain the luminous mechanism. The results infer that Ca3MgSi2O8:Eu3+, Bi3+ phosphor has application prospect in white light-emitting diode excited by near ultraviolet light. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

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Abstract:	In this work, Ca3MgSi2O8:Bi3+, Ca3MgSi2O8:xEu3+ (x = 0, 2, 4, 6, 8, and 10 mol%), and Ca3MgSi2O8:6%Eu3+, yBi3+ (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 Ca3MgSi2O8:Bi3+ phosphor can be observed in the range of 225–380 nm because of the 1S0 → 1P1 and 3P1 transitions, and its emission spectrum peaking at ~ 410 nm is in the region from 340 to 650 nm owing to the 3P1,0 → 1S0 transition of Bi3+ ion. The excitation spectrum of Ca3MgSi2O8:Eu3+ phosphor in the range of 220–550 nm is found owing to the f–f transition of Eu3+ 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 5D0 → 7F0, 7F1, 7F2, 7F3, and 7F4 transitions of Eu3+ ion. The luminous performance improvement of Ca3MgSi2O8:Eu3+ phosphor via co-doping Bi3+ ions is investigated. The emission spectra of Ca3MgSi2O8:Eu3+, Bi3+ phosphor under excitation at 320 and 394 nm mainly come from the 5D0 → 7F0, 7F1, 7F2, 7F3, and 7F4 transitions of Eu3+ ion due to energy transfer from Bi3+ to Eu3+ ions. We observe the tunable emission properties of Ca3MgSi2O8:Eu3+, Bi3+ phosphor and use the energy level diagrams of Bi3+ and Eu3+ ions to explain the luminous mechanism. The results infer that Ca3MgSi2O8:Eu3+, Bi3+ phosphor has application prospect in white light-emitting diode excited by near ultraviolet light. [ABSTRACT FROM AUTHOR]
ISSN:	09574522
DOI:	10.1007/s10854-021-07039-2