Novel green/red oxyfluoride phosphors with excellent optical properties for near-UV excited white light emitting diode.

Liu, Xiaoyi; Cheng, Haiming; Yue, Bin; Wen, Zhu; Jin, Ying; Liu, Guixia; Liu, Shengda; Li, Dan; Wang, Jinxian; Yu, Wensheng; Dong, Xiangting

Liu, Xiaoyi; Cheng, Haiming; Yue, Bin; Wen, Zhu; Jin, Ying; Liu, Guixia; Liu, Shengda; Li, Dan; Wang, Jinxian; Yu, Wensheng; Dong, Xiangting.

Afiliación

Liu X; College of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China; Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
Cheng H; State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry Jilin University, Changchun 130012, China.
Yue B; College of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China; Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
Wen Z; Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
Jin Y; Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
Liu G; College of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China; Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China. Electronic address
Liu S; Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
Li D; Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
Wang J; Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
Yu W; Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.
Dong X; Key Laboratory of Applied Chemistry and Nanotechnology at Universities of Jilin Province, Changchun University of Science and Technology, Changchun 130022, China.

J Colloid Interface Sci ; 666: 162-175, 2024 Jul 15.

Article en En | MEDLINE | ID: mdl-38593651

ABSTRACT

ABSTRACT

Novel eye-sensitive Ba3Nb2O2F12(H2O)2Tb3+ green and Ba3Nb2O2F12(H2O)2Mn4+ red oxyfluoride phosphors with extremely strong absorption in the UV region were designed and synthesized by simple co-precipitation strategy. Particularly, Tb3+ ions were doped in this matrix for the first time, which greatly improves their absorption efficiency in the near ultraviolet region (367 nm) and emits sharp green light (544 nm). In addition, the Ba3Nb2O2F12(H2O)2Mn4+ red phosphors have strong zero phonon line (ZPL) emission at 625 nm, which is conducive to improving the sensitivity of human eye and color purity. Meanwhile, the optical properties of the red phosphor are significantly enhanced via doping K+ cations as charge compensators. Crystal field environment and nephelauxetic effect of the as-prepared phosphors before and after K+ cation doping were systematically analyzed. Moreover, these synthesized red/green phosphors have good thermal stability and moisture resistance. Remarkably, the as-prepared Ba3Nb2O2F12(H2O)25%Mn4+ or K0.9Ba2.1Nb2O2F12(H2O)25%Mn4+ red phosphors can be directly mixed with the as-synthesized Ba3Nb2O2F12(H2O)213%Tb3+ green phosphor coating on 365 nm near-ultraviolet LED chip to package WLED devices with excellent electroluminescence performance. These findings are conducive to opening an avenue for screening the unique structure of optical materials.

Palabras clave

Mn(4+); Oxyfluoride; Phosphor; Tb(3+); WLED

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