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Updated: Jul 14, 2026

Synthesis of Persistent Luminescent Nanoparticles for Rewritable Displays and Illumination Applications
Published on: September 13, 2024
[Luminescence properties of white LED blue light conversion materials]
Hai-tao Hao1, He-feng Zhou, Jian Liang
1Key Laboratory of Interface Science and Engineering in Advanced Materials of Taiyuan University of Technology, Taiyuan 030024, China.
Rare earth oxides were used to create yttrium aluminum garnet phosphors for efficient blue light excitation. These phosphors enable tunable emission for high-quality white LEDs with excellent color rendering.
Area of Science:
- Materials Science
- Solid-state Chemistry
Context:
- Rare earth oxides are crucial raw materials for advanced phosphors.
- High-energy ball milling and solid-state reactions are common synthesis methods for ceramic materials.
- Yttrium aluminum garnet (YAG) is a well-established host lattice for luminescent applications.
Purpose:
- To synthesize and characterize yttrium aluminum garnet (YAG) phosphors doped with cerium (Ce) and gadolinium (Gd) ions.
- To investigate the structural and luminescence properties of the synthesized phosphors.
- To evaluate the performance of fabricated white LEDs using these novel phosphors.
Summary:
- Yttrium aluminum garnet (YAG) crystals doped with Ce and Gd ions were successfully synthesized using high energy ball milling and solid-state reaction at 1300°C.
- X-ray diffraction (XRD) confirmed the cubic crystal structure. Emission and excitation spectra revealed effective blue light excitation and tunable emission peaks (530-560 nm) by adjusting doping concentrations.
- The red shift in emission spectra was explained using the configuration coordination model.
Impact:
- Fabricated white LEDs demonstrated promising performance with chromaticity coordinates (x=0.310, y=0.323), lumen efficiency of 26.13 lm/W, color rendering index of 81.8, and color temperature of 6605 K at 20 mA and 3.5 V.
- The tunable emission properties of Ce,Gd-doped YAG phosphors offer potential for customized white light generation in solid-state lighting.
- This research contributes to the development of efficient and high-performance phosphors for next-generation lighting applications.
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