All-in-one light-tunable borated phosphors with chemical and luminescence dynamical control resolution

Chun Che Lin, Yun Ping Liu, Zhi Ren Xiao, Yin Kuo Wang, Bing Ming Cheng, Ru Shi Liu

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Single-composition white-emitting phosphors with superior intrinsic properties upon excitation by ultraviolet light-emitting diodes are important constituents of next-generation light sources. Borate-based phosphors, such as NaSrBO3:Ce3+ and NaCaBO3:Ce3+, have stronger absorptions in the near-ultraviolet region as well as better chemical/physical stability than oxides. Energy transfer effects from sensitizer to activator caused by rare-earth ions are mainly found in the obtained photoluminescence spectra and lifetime. The interactive mechanisms of multiple dopants are ambiguous in most cases. We adjust the doping concentration in NaSrBO3:RE (RE = Ce3+, Tb3+, Mn2+) to study the energy transfer effects of Ce3+ to Tb3+ and Mn2+ by comparing the experimental data and theoretical calculation. The vacuum-ultraviolet experimental determination of the electronic energy levels for Ce3+ and Tb3+ in the borate host regarding the 4f-5d and 4f-4f configurations are described. Evaluation of the Ce 3+/Mn2+ intensity ratios as a function of Mn2+ concentration is based on the analysis of the luminescence dynamical process and fluorescence lifetime measurements. The results closely agree with those directly obtained from the emission spectra. Density functional calculations are performed using the generalized gradient approximation plus an on-site Coulombic interaction correction scheme to investigate the forbidden mechanism of interatomic energy transfer between the NaSrBO3:Ce3+ and NaSrBO3:Eu2+ systems. Results indicate that the NaSrBO3:Ce3+, Tb3+, and Mn2+ phosphors can be used as a novel white-emitting component of UV radiation-excited devices.

Original languageEnglish
Pages (from-to)9160-9172
Number of pages13
JournalACS Applied Materials and Interfaces
Volume6
Issue number12
DOIs
Publication statusPublished - Jun 25 2014
Externally publishedYes

Fingerprint

Phosphors
Energy transfer
Luminescence
Borates
Doping (additives)
Ultraviolet radiation
Oxides
Electron energy levels
Rare earths
Density functional theory
Light emitting diodes
Light sources
Photoluminescence
Fluorescence
Vacuum
Ions
Chemical analysis
Ultraviolet Rays

Keywords

  • devices
  • DFT investigations
  • energy transfer effects
  • white-emitting phosphors

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

All-in-one light-tunable borated phosphors with chemical and luminescence dynamical control resolution. / Lin, Chun Che; Liu, Yun Ping; Xiao, Zhi Ren; Wang, Yin Kuo; Cheng, Bing Ming; Liu, Ru Shi.

In: ACS Applied Materials and Interfaces, Vol. 6, No. 12, 25.06.2014, p. 9160-9172.

Research output: Contribution to journalArticle

Lin, Chun Che ; Liu, Yun Ping ; Xiao, Zhi Ren ; Wang, Yin Kuo ; Cheng, Bing Ming ; Liu, Ru Shi. / All-in-one light-tunable borated phosphors with chemical and luminescence dynamical control resolution. In: ACS Applied Materials and Interfaces. 2014 ; Vol. 6, No. 12. pp. 9160-9172.
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AB - Single-composition white-emitting phosphors with superior intrinsic properties upon excitation by ultraviolet light-emitting diodes are important constituents of next-generation light sources. Borate-based phosphors, such as NaSrBO3:Ce3+ and NaCaBO3:Ce3+, have stronger absorptions in the near-ultraviolet region as well as better chemical/physical stability than oxides. Energy transfer effects from sensitizer to activator caused by rare-earth ions are mainly found in the obtained photoluminescence spectra and lifetime. The interactive mechanisms of multiple dopants are ambiguous in most cases. We adjust the doping concentration in NaSrBO3:RE (RE = Ce3+, Tb3+, Mn2+) to study the energy transfer effects of Ce3+ to Tb3+ and Mn2+ by comparing the experimental data and theoretical calculation. The vacuum-ultraviolet experimental determination of the electronic energy levels for Ce3+ and Tb3+ in the borate host regarding the 4f-5d and 4f-4f configurations are described. Evaluation of the Ce 3+/Mn2+ intensity ratios as a function of Mn2+ concentration is based on the analysis of the luminescence dynamical process and fluorescence lifetime measurements. The results closely agree with those directly obtained from the emission spectra. Density functional calculations are performed using the generalized gradient approximation plus an on-site Coulombic interaction correction scheme to investigate the forbidden mechanism of interatomic energy transfer between the NaSrBO3:Ce3+ and NaSrBO3:Eu2+ systems. Results indicate that the NaSrBO3:Ce3+, Tb3+, and Mn2+ phosphors can be used as a novel white-emitting component of UV radiation-excited devices.

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