Monolithic Dual-Wavelength AlGaN-Based UV-LEDs with Controllable Spectral Profile

• DOI: 10.1021/acsphotonics.4c00114
• Publication Date: 2024-05-11T02:05:34Z
• Authors: Tai Li; Bowen Sheng; Wei Luo; Tao Wang; Yixin Wang; Renchun Tao; Zexing Yuan; Tongxin Lu; Ye Yuan; Junjie Kang; Jiajia Yang; Zhaoying Chen; Bo Shen; Xinqiang Wang
• Keywords: Ultraviolet; Quantum Efficiency

Ultraviolet (UV) light sources with multiple wavelength emissions have many applications in different scenarios. However, there are rare reports on multiwavelength UV light-emitting diodes (LEDs). In this paper, through adopting dual-wavelength quantum wells (MQWs) a specific structure of an ultrathin AlGaN single well (SQW) emission at the UVC range grown MQWs UVB range, we fabricate UV-LED simultaneous wavelengths 278 and 307 nm. This exhibits high wall-plug efficiency (WPE) 3.86% under operating current 10 mA demonstrates impressive spectral stability increasing from to 100 mA. Furthermore, able manipulate profile UV-LEDs by adjusting thickness barrier between SQW MQWs. high-performance fabricated integrated monolithic chip stable controllable characteristics is useful for expanding compact AlGaN-based UV-LEDs.