Double-Channel UV Photodetector

30× Higher Response in Weak Light

An AlGaN/GaN double-channel heterostructure separates photogenerated carriers via built-in polarization fields, delivering ultrahigh responsivity at extremely low light intensities—optimized for weak-light detection.

Xiuyi, Bian · Yu, Shunjie · Xiaoyu, Liu · Tang, Xi · 77139864 · Yang, Shu

IEEE Electron Device Letters 2025

Specifications

光照

{'zh': '3.8', 'en': ''} μW/cm²

比探测率

{'zh': '3.4×10¹⁵', 'en': ''} cm·Hz

Decay time constant

{'zh': '', 'en': '2.3'} ms

Responsivity

{'zh': '约30', 'en': '~30'} times higher