A novel extra-broadband visible-emitting garnet phosphor for efficient single-component pc-WLEDs

The development of extra-broadband visible emission phosphors is crucial to achieve next-generation illumination with better color experience. Herein, a defect engineering strategy mediated by the structural cationic substitution is proposed and experimentally demonstrated for specific ultra-broadba...

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Bibliographic Details
Published in:Inorganic chemistry frontiers 2024-11, Vol.11 (23), p.8547-8554
Main Authors: Chen, Qianyi, Lun, Zhenjie, Chen, Dongdan, Sun, Yongsheng, Xiong, Puxian, Li, Siyun, Xu, Shanhui, Yang, Zhongmin
Format: Article
Language:English
Subjects:
Broadband
Cations
Crystal defects
Crystal lattices
Emission
Emitters
Garnets
Lattice vacancies
Light emitting diodes
Phosphors
Potential fields
Quantum efficiency
Thermal resistance
White light
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Summary:The development of extra-broadband visible emission phosphors is crucial to achieve next-generation illumination with better color experience. Herein, a defect engineering strategy mediated by the structural cationic substitution is proposed and experimentally demonstrated for specific ultra-broadband emission in a garnet phosphor. The induced oxygen vacancies and interstitial cation through lattice distortion break the periodic potential field of the crystal and provide electronic levels in the band gap. As a result, excited by blue-light-emitting diodes, the novel Y3Sc2Al3O12:B3+ shows an ultra-broad emission with a full width at half maximum (FWHM) of ∼170 nm. Compared to general defect-emitting phosphors, the unique Y3Sc2Al3O12:B3+ exhibits excellent thermal quenching resistance and superior internal quantum efficiency of up to 95%. These findings not only show great promise of Y3Sc2Al3O12:B3+ as an extra-broadband emitter but also provide a new design strategy to achieve a full-visible-spectrum phosphor in a single-component material for white-light applications.
ISSN:2052-1545
2052-1553
DOI:10.1039/d4qi01824a