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The central challenge lies in developing integrated devices with high functional density for in\u2010situ fusion of sensing, memory, and computing. Here, we propose a multifunctional vertical bulk\u2010heterojunction transistor (MVBT) based on amorphous GaO\n                    <jats:sub>x<\/jats:sub>\n                    dielectric layer, integrating four functions within a single device: deep\u2010ultraviolet (DUV) photodetection, threshold neuronal firing, broadband optoelectronic synaptic function, and reconfigurable logic gates. In the two\u2010terminal (gate\u2010source) mode, the ultraviolet\u2010selective photoresponse and electrochemical reactions of amorphous gallium oxide (a\u2010GaO\n                    <jats:sub>x<\/jats:sub>\n                    ) enable deep\u2010ultraviolet photodetection and neuronal firing, respectively. In the three\u2010terminal mode, the organic bulk\u2010heterojunction active layer supports broadband optoelectronic synaptic function from ultraviolet to near\u2010infrared wavelengths. Asymmetric interfacial carrier\u2010injection barriers further enable bias\u2010reconfigurable AND\/OR logic functions. In addition, a pixelated MVBT array demonstrates dual\u2010mode image sensing and visual preprocessing. Building upon these multifunctional capabilities, an MVBT\u2010based convolutional spiking neural network (CSNN) hybrid simulation architecture achieves a fingerprint recognition accuracy of 97.4%. This work provides a new strategy for constructing high\u2010functional\u2010density neuromorphic hardware integrating sensing, memory, computing, and decision\u2010making.\n                  <\/jats:p>","DOI":"10.1002\/advs.78415","type":"journal-article","created":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T05:13:12Z","timestamp":1792559592000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Multifunctional Vertical Bulk\u2010Heterojunction Transistors With Amorphous GaO\n                    <sub>x<\/sub>\n                    for Neuromorphic Perception\u2010to\u2010Decision"],"prefix":"10.1002","author":[{"given":"Jinkui","family":"Si","sequence":"first","affiliation":[{"name":"Department of Physics School of Science Jimei University  Xiamen People's Republic of 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