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Citation: Jiu-Jun ZHOU, Lai-Hui LUO, Peng DU, Jun-Peng XUE. Synthesis and Optical Properties of Eu3+-Doped Ca2KZn2(VO4)3 Yellow-Emitting Phosphors for Full-Spectrum White Light-Emitting Diode[J]. Chinese Journal of Inorganic Chemistry, ;2022, 38(2): 244-252. doi: 10.11862/CJIC.2022.041 shu

Synthesis and Optical Properties of Eu3+-Doped Ca2KZn2(VO4)3 Yellow-Emitting Phosphors for Full-Spectrum White Light-Emitting Diode

  • 1.

    School of Physical Science and Technology, Ningbo University, Ningbo, Zhejiang 315211, China

  • 2.

    Department of Physics, Pukyong National University, Busan 608-737, Republic of Korea

Figures(7)

  • Traditional phosphor-converted white light-emitting diode (WLED), which is constructed either by using a blue-chip to pump yellow phosphors or a near-ultraviolet (NUV) chip to excite trichromatic phosphors, suffers from an evident cavity in the cyan region, resulting in the unsatisfied color quality of the white light. Thereby, Eu3+-doped Ca2KZn2 (VO4)3 yellow-emitting phosphors with the emission in a range of 400-750 nm were prepared to cover this spectral gap to obtain the full-spectrum white light. Excited by 378 nm, both the emissions arising from VO43- group and Eu3+ were seen in the prepared samples. The optimal doping content (molar fraction) for Eu3+ ions in the Ca2KZn2(VO4)3 host was 0.05 and energy transfer efficiency from VO43- group to Eu3+ was calculated to be around 64.9%. The thermal quenching performances of the final compounds were investigated via the use of the temperature-dependent emission spectra and the activation energies of the VO43- group and Eu3+ were 0.538 and 0.510 eV, respectively. In addition, a WLED device using the prepared yellow-emitting phosphors, commercial blue phosphors, and NUV chip exhibited well-distributed warm white light with low color correlated temperature of 3 843 K and high color rendering index of 85.8.
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