• Unipolar barrier architectures (nBn, pBp) can decouple sensitivity and speed in solar-blind UV photodetectors.
• Band engineering in UWBG semiconductors like Ga2O3 and AlGaN enables efficient charge separation and fast response.
• The proposed designs overcome persistent photoconductivity and interface recombination limitations.
• These advancements pave the way for compact, high-performance solar-blind UV detectors for diverse applications.
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