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High-Performance Simultaneous Two-Photon Absorption Upconverted Stimulated Single-Component Sr2V2O7 Phosphor for White LEDs

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Abstract

Notwithstanding the wide use of white light-emitting diodes (w-LEDs), conventionally consisting of multiple emitting components, some inevitable issues still exist nowadays, such as the intrinsic color balance, device complexity, and high cost associated with such multiple emitting components. We have synthesized simultaneous two-photon absorption upconverted stimulated single-component Sr2V2O7 phosphor for use in w-LEDs. Due to the photon avalanche upconversion, the as-grown phosphor exhibits an enhanced photoluminescence spectrum in the range of 400 nm to 650 nm for white light when excited by red light at 693 nm. Moreover, when evenly dispersed in polyethylene glycol dispersant, the as-grown phosphor simultaneously produced strong visible white light when using an excitation wavelength λ ex of 693 nm, suggesting a possible route to produce w-LEDs by using red chips as an excellent substitute for traditional w-LEDs with multiple emitting components based on rare-earth metals. Finally, density functional calculations were performed using the generalized gradient approximation to study the electronic structure of Sr2V2O7 crystal. A reasonable model is proposed to explain the two-photon absorption luminescence mechanism.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (No. 51202023), Sichuan Province Science and Technology Plan Project (No. 2015JQ0013), and the Fundamental Research Funds for the Central Universities (A0920502051408-10).

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Authors and Affiliations

  1. Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China

    Hong Pan, Lei Zhang, Long Jin, Binbin Zhang & Weiqing Yang

  2. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, 610054, China

    Weiqing Yang

Authors
  1. Hong Pan
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  2. Lei Zhang
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  3. Long Jin
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  4. Binbin Zhang
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Correspondence to Weiqing Yang.

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Pan, H., Zhang, L., Jin, L. et al. High-Performance Simultaneous Two-Photon Absorption Upconverted Stimulated Single-Component Sr2V2O7 Phosphor for White LEDs. J. Electron. Mater. 44, 3465–3470 (2015). https://doi.org/10.1007/s11664-015-3880-8

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  • DOI: https://doi.org/10.1007/s11664-015-3880-8

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