Story perspectives

New P-N Diode Revolutionizes Photosensing and Memory Integration

3/27/2026

Summary

Story summary

Researchers have developed a p–n diode that integrates photosensing, memory, and processing capabilities.
It uses vertically grown p-GaN/n-AlGaN/n-GaN nanowires on a silicon substrate, with a bandgap-aligned AlGaN segment forming an electron reservoir.
The device exhibits bias-tunable photosensing with a responsivity of 10.45 mA W–1, along with photosynaptic behavior and photo-memory capabilities.
An array of these diodes forms a compact, energy-efficient image sensor for denoising and image classification without extra circuits.

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Story summary

Researchers have developed a p–n diode that integrates photosensing, memory, and processing capabilities.
It uses vertically grown p-GaN/n-AlGaN/n-GaN nanowires on a silicon substrate, with a bandgap-aligned AlGaN segment forming an electron reservoir.
The device exhibits bias-tunable photosensing with a responsivity of 10.45 mA W–1, along with photosynaptic behavior and photo-memory capabilities.
An array of these diodes forms a compact, energy-efficient image sensor for denoising and image classification without extra circuits.