Luminescence center modulation for the synthesis of a narrow-band green phosphor: mechanism and backlighting display application

Chen, Gongli; Cao, Yaxin; Li, ZhenHua; Wang, Xicheng; Wang, Yuhua

doi:10.1039/d4cc01093k

Chem. Commun.

2024

DOI: 10.1039/d4cc01093k

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Luminescence center modulation for the synthesis of a narrow-band green phosphor: mechanism and backlighting display application

Gongli Chen,

Yaxin Cao,

ZhenHua Li

et al.

Abstract: A highly efficient and stable green phosphor with narrow-emission band was achieved in a hexagonal aluminate based on the energy transfer between Eu2+ and Mn2+ luminescence centers. The related mechanism...

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Ultra‐Narrowband Green‐Emitting Transparent Composite Ceramics for Laser‐Driven Display

Hu,

Lin,

Pang

et al. 2024

Advanced Materials

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Laser‐driven projection displays face a critical challenge in developing laser‐excitable and high‐performance narrowband green emitters. Herein, new Al2O3‐LaMgAl11O19: Mn2+ (Al2O3‐LMA: Mn2+) transparent composite ceramics are reported via high‐temperature vacuum sintering, which produces a high‐color‐purity (95.4%) green emission with full width at half maximum of 24 nm and superior thermal and moisture and laser irradiation stability. These are attributed to low electron‐phonon couple, weak crystal‐field effect, an individual lattice location of Mn2+ activators in high structural rigid host, and the incorporation of a high‐thermal‐conductivity Al2O3 secondary phase. As a result, the composite ceramics are demonstrated as an attractive color converter with a high external quantum efficiency (38%) and absorption coefficient (53%), which ensures a luminous flux of 2012 lm @40.0 W, a luminous efficacy of 67.7 lm W−1, and a green light conversion efficiency of 20.3% upon blue laser irradiation. This enables to construct a brand‐new laser‐driven prototype display with a record color gamut beyond Rec.2020 standard (100.8%), outperforming commercial YAG: Ce3+ and β‐SiAlON: Eu2+. This exploration in ultra‐narrowband green luminescent materials is poised to accelerate the development of “ideal displays” for laser‐driven projection display technology.

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Ultra‐Narrowband Green‐Emitting Transparent Composite Ceramics for Laser‐Driven Display

Hu,

Lin,

Pang

et al. 2024

Advanced Materials

View full text Add to dashboard Cite

show abstract

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Luminescence center modulation for the synthesis of a narrow-band green phosphor: mechanism and backlighting display application

Abstract: A highly efficient and stable green phosphor with narrow-emission band was achieved in a hexagonal aluminate based on the energy transfer between Eu2+ and Mn2+ luminescence centers. The related mechanism...

Cited by 1 publication

References 31 publications

Ultra‐Narrowband Green‐Emitting Transparent Composite Ceramics for Laser‐Driven Display

Ultra‐Narrowband Green‐Emitting Transparent Composite Ceramics for Laser‐Driven Display

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