[15p-K401-1~15] 15.4 III-V-group nitride crystals

5:00 PM - 5:15 PM JST(8:00 AM - 8:15 AM UTC)English Presentation

[15p-K401-14] AlGaN-Based Deep-Ultraviolet LEDs Achieving 9.1% Wall-Plug Efficiency by Enhanced Light Extraction Efficiency

〇Guodong Hao¹, Manabu Taniguchi¹, Shin-ichiro Inoue¹ (1.NICT)

Keywords:

AlGaN-based DUV-LEDs,high wall-plug efficiency,high light extraction efficiency

Achieving high wall-plug efficiency (WPE) remains a challenge, with typical values below 5%. In this talk, we present an approach to enhance the WPE of flip-chip DUV-LEDs by improving the LEE while maintaining high electrical efficiency. The WPE reached 9.1% and the EQE was approximately 10.1% after encapsulation for DUV-LEDs emitting at 275 nm. This result represents one of the highest reported WPE values to date.