Ultra-transparent β-Ga 2O 3:Cr 3+ glass-ceramics enabling high-efficiency true-transmission near-infrared light-emitting diodes

作者：Shaoan Zhang, Yi Long, Penghui Zhang, Zaijin Fang, Zhenzhang Li, Huacong Ye, Guojun Zheng, Hong Jia, Jianrong Qiu, Yang Li · 发表于：Journal of Advanced Ceramics · 年份：2025 · DOI：10.26599/jac.2025.9221075 · 被引用次数：39 · 研究领域：Ga2O3 and related materials、Advanced Photocatalysis Techniques、Luminescence Properties of Advanced Materials

Near-infrared phosphor converted light-emitting diodes (NIR pc-LEDs), one of the most promising NIR light sources, have garnered significant attention owing to their compact structure, long lifetime and energy conservation. Despite these advantages, commercial NIR pc-LEDs employing pseudo-transmission configurations -where NIR phosphor and silicone composites are directly coated on blue LED chips-suffer from critical limitations in thermal management that severely deteriorates their NIR output performance. To address these intrinsic limitations, we developed an oxygen-coordination-competitive crystallization strategy to engineer high-transparency β-Ga2O3:Cr3+ glass-ceramics (GC). This strategy leveraged the strong oxygen affinity of Ga3+ ions, which during thermal processing drove the directional migration and recombination of Ga3+ and O2- ions within the isolated [GaO4] tetrahedral network. This controlled phase evolution enabled localized crystallization of β-Ga2O3:Cr3+ nanocrystals while maintaining high-transparency. The optimized β-Ga2O3:Cr3+ GC ( 0.4 mm thickness) achieved remarkable 81.2% NIR transmittance, approaches internal quantum efficiency (IQE≈100%) and high thermal stability (89%@423 K). When employing this high-transparency β-Ga2O3:Cr3+ GC as NIR conversion material, NIR GC converted LEDs (GCc-LEDs) achieved 568 mW NIR output power at 500 mA drive current with a photoelectric conversion efficiency of 13%. The demonstrated performance metrics of NIR GCc-LEDs po...