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Journal of Materials Science

, Volume 51, Issue 4, pp 1985–1995 | Cite as

Tunable color of Ce3+/Tb3+-codoped Ba3Sr4(BO3)3F5 phosphors for near-UV-pumped LEDs

  • Jianfeng Sun
  • Jiayue Sun
Original Paper

Abstract

Single-component-tunable blue-to green-light-emitting phosphors Ba3Sr4(BO3)3F5: Ce3+, Tb3+, Na+ (BSBF: Ce3+, Tb3+, Na+) promising for near-UV-pumped light-emitting diodes (LEDs) were synthesized via high-temperature solid-state reactions, and their photoluminescence properties were systematically investigated. Upon the excitation of 360 nm, the BSBF: Ce3+, Tb3+, Na+ phosphors exhibited a broad blue emission band at 422 nm and a series of sharp emission lines at 490, 544, 585, and 623 nm, which originated from the 4f 05d 1–4f 1 transition of Ce3+ ions, and 5 D 47 F J (J = 6, 5, 4, 3) transitions of Tb3+ ions, respectively. Through the resonance-type energy transfer, the varied emitted colors from blue through cyan and eventually to green were achieved by properly tuning the relative dopant composition of Ce3+/Tb3+. Moreover, the energy transfer from Ce3+ to Tb3+ in BSBF host matrix was demonstrated via the dipole–dipole interaction mechanism. Additionally, the critical distances (\( R_{\text{C}} \)) calculated by quenching concentration and spectral overlap method in such system were 2.166 and 1.940 nm, and the activation energy for thermal quenching (ΔE) was determined to be 0.117 eV. These results indicate that the developed color-tunable phosphors BSBF: Ce3+, Tb3+, Na+ are competitive as the promising single-component phosphor-converted materials for near-UV-pumped LEDs.

Keywords

Excitation Band Energy Transfer Process Thermal Quenching Lead Chip Chromaticity Diagram 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

J. S. expresses his sincere thanks to Ms. X. Y. Zhang of Beijing Technology and Business University for her contribution in the fluorescence lifetime measurements and helpful discussions.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Key Laboratory of Special Functional Materials for Ecological Environment and Information (Ministry of Education of China), Key Laboratory for New Type of Functional Materials in Hebei Province, Institute of Power Source & Ecomaterials ScienceHebei University of TechnologyTianjinChina
  2. 2.School of ScienceBeijing Technology and Business UniversityBeijingChina

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