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Here, a fully light\u2010driven and scalable optoelectronic neuromorphic circuit with metal\u2010chalcogenide\/metal\u2010oxide heterostructure phototransistor and photovoltaic divider is proposed. To achieve wavelength\u2010selective neural operation and hardware\u2010based pattern recognition, multispectral light modulated bidirectional synaptic circuits are utilized as an individual pixel for highly accurate and large\u2010area neuromorphic computing system. The wavelength selective control of photo\u2010generated charges at the heterostructure interface enables the bidirectional synaptic modulation behaviors including the excitatory and inhibitory modulations. More importantly, a 7 \u00d7 7 neuromorphic pixel circuit array is demonstrated to show the viability of implementing highly accurate hardware\u2010based pattern training. In both the pixel training and pattern recognition simulation, the neuromorphic circuit array with the bidirectional synaptic modulation exhibits lower training errors and higher recognition rates, respectively.<\/jats:p>","DOI":"10.1002\/adma.202105017","type":"journal-article","created":{"date-parts":[[2021,9,23]],"date-time":"2021-09-23T02:42:07Z","timestamp":1632364927000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":100,"title":["Large\u2010Area Pixelized Optoelectronic Neuromorphic Devices with Multispectral Light\u2010Modulated Bidirectional Synaptic Circuits"],"prefix":"10.1002","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1188-1013","authenticated-orcid":false,"given":"Sung Min","family":"Kwon","sequence":"first","affiliation":[{"name":"School of Electrical and Electronics Engineering Chung\u2010Ang University  Seoul 06974 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jee Young","family":"Kwak","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronics Engineering Chung\u2010Ang University  Seoul 06974 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7485-5189","authenticated-orcid":false,"given":"Seungho","family":"Song","sequence":"additional","affiliation":[{"name":"School of Advanced Materials Science and Engineering Sungkyunkwan University  Suwon 16419 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeehoon","family":"Kim","sequence":"additional","affiliation":[{"name":"School of Advanced Materials Science and Engineering Sungkyunkwan University  Suwon 16419 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7386-5510","authenticated-orcid":false,"given":"Chanho","family":"Jo","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronics Engineering Chung\u2010Ang University  Seoul 06974 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sung Soo","family":"Cho","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronics Engineering Chung\u2010Ang University  Seoul 06974 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seung\u2010Ji","family":"Nam","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronics Engineering Chung\u2010Ang University  Seoul 06974 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jaehyun","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Materials Research Center Northwestern University  2145 Sheridan Road Evanston IL 60208 USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5820-8280","authenticated-orcid":false,"given":"Gyeong\u2010Su","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Material Science and Engineering Seoul National University  Seoul 08826 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0057-1893","authenticated-orcid":false,"given":"Yong\u2010Hoon","family":"Kim","sequence":"additional","affiliation":[{"name":"School of Advanced Materials Science and Engineering Sungkyunkwan University  Suwon 16419 Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9617-2541","authenticated-orcid":false,"given":"Sung Kyu","family":"Park","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronics Engineering Chung\u2010Ang University  Seoul 06974 Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2021,9,22]]},"reference":[{"key":"e_1_2_8_1_1","doi-asserted-by":"publisher","DOI":"10.1126\/science.1123053"},{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/s41467-020-19806-6"},{"key":"e_1_2_8_3_1","first-page":"29","volume-title":"Proceedings of the South African Symposium on Communications and Signal Processing","author":"Venayagamoorthy G. 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