@article{Tian2026, 
author = {Shidai Tian and Mengmeng Jia and Te Xu and Xiang Zhang and Yulong Wang and Jitao Liu and Jizhou Zhang and Di Guo and Junyi Zhai and Feiming Bai},
title = {Strain-enhanced image recognition via piezo-phototronic effect in MnSe/α-In2Se3 heterostructure photodetector},
year = {2026},
journal = {Nano Research},
volume = {19},
number = {4},
pages = {94908320},
keywords = {two-dimensional (2D) materials, van der Waals heterostructure, piezo-phototronic effect, strain modulation, visual-tactile perception},
url = {https://www.sciopen.com/article/10.26599/NR.2026.94908320},
doi = {10.26599/NR.2026.94908320},
abstract = {The discovery of two-dimensional (2D) van der Waals materials has created unprecedented opportunities for flexible optoelectronics and bio-inspired neuromorphic systems. Here, we present a flexible broadband MnSe/α-In2Se3 p–n heterojunction photodetector that simultaneously achieves outstanding optoelectronic performance (1.28 A/W photoresponsivity, 9.11 × 108 Jones detectivity, 353% external quantum efficiency at 450 nm) and strain-tunable response via the piezo-phototronic effect, demonstrating 203.9% enhancement under 0.303% tensile strain and 50.4% suppression under compression. The strain-modulated photoresponse enables direct coupling between optical and mechanical stimuli, where mechanical stimuli are directly converted into photocurrent variations without analog-to-digital conversion. Inspired by this mechanism, we develop a visuo-tactile fusion platform that integrates strain-gated signals as a fourth sensory channel. Implemented in an all-in-one architecture, the system achieves 86% recognition accuracy for Gaussian-blurred CIFAR-10 dataset with only 50 training epochs, while reducing system complexity compared to conventional multi-sensor platforms. This work not only demonstrates a novel heterostructure design for multi-dimensional optoelectronics but also reveals the potential of the piezo-phototronic effect in bio-inspired multisensory integration systems.}
}