Ultra-transparent β-Ga2O3:Cr3+ glass-ceramics

NIR conversion material

A glass-ceramic for NIR LEDs that achieves an exceptional balance of high transparency and efficient NIR emission via an oxygen-coordination-competitive crystallization strategy, overcoming thermal management limitations of conventional pseudo-transmission designs.

Zhang, Shaoan · Yi, Long · Penghui, Zhang · Fang, Zaijin · Zhenzhang, Li · Huacong, Ye · Zheng, Guojun · Jia, Hong · Qiu, Jianrong · Li, Yang

Journal of Advanced Ceramics 2025

Specifications

NIR transmittance

{'zh': '81.2', 'en': '81.2'} %

Internal quantum efficiency

{'zh': '100', 'en': '100'} %

Thermal stability

{'zh': '89', 'en': '89'} %

NIR output power

{'zh': '568', 'en': '568'} mW

Photoelectric conversion efficiency

{'zh': '13', 'en': '13'} %

Advantages

Transparent and efficient

Achieves 81.2% transmittance and near-unity IQE simultaneously, overcoming the trade-off between transparency and emission efficiency.

Thermally stable

Maintains 89% of emission intensity at 423 K, suitable for high-power LED operation.

High output power

Delivers 568 mW NIR output at 500 mA as a conversion layer, surpassing pseudotransmission designs.

Applications

• NIR LEDs：Replacing phosphor/silicone composites with better thermal management and higher output
• Point-of-care diagnostics：Supplying intense NIR illumination for portable medical diagnostics
• Nondestructive testing：Enabling deep-tissue imaging in industrial inspection with high transparency and efficiency
• Intelligent night vision：Providing stable and efficient NIR illumination for enhanced night vision systems