{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,27]],"date-time":"2026-08-27T05:17:31Z","timestamp":1787807851946,"version":"build-2784847793"},"reference-count":56,"publisher":"MDPI AG","issue":"17","license":[{"start":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T00:00:00Z","timestamp":1787616000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Science and Technology Council","award":["NSTC 112-2628-E-006-004-"],"award-info":[{"award-number":["NSTC 112-2628-E-006-004-"]}]},{"name":"National Science and Technology Council","award":["NSTC 113-2628-E-006-018-"],"award-info":[{"award-number":["NSTC 113-2628-E-006-018-"]}]},{"name":"National Science and Technology Council","award":["NSTC 114-2628-E-006-001-"],"award-info":[{"award-number":["NSTC 114-2628-E-006-001-"]}]},{"award":["NSTC 112-2628-E-006-004-"],"award-info":[{"award-number":["NSTC 112-2628-E-006-004-"]}],"id":[{"id":"https:\/\/ror.org\/02kv4zf79","id-type":"ROR","asserted-by":"publisher"}]},{"award":["NSTC 113-2628-E-006-018-"],"award-info":[{"award-number":["NSTC 113-2628-E-006-018-"]}],"id":[{"id":"https:\/\/ror.org\/02kv4zf79","id-type":"ROR","asserted-by":"publisher"}]},{"award":["NSTC 114-2628-E-006-001-"],"award-info":[{"award-number":["NSTC 114-2628-E-006-001-"]}],"id":[{"id":"https:\/\/ror.org\/02kv4zf79","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Organic electrochemical transistors (OECTs) utilize ion injections to regulate the overall conductivity of the organic semiconductor channel, achieving high transconductance (gm) by coupling ionic and electronic charge carriers within the whole channel\u2019s volume. However, the slow ion migration rate through the hydrophobic semiconducting polymer layer restricts the response rate of the device for widespread applications in biomedical sensing. This work introduced poly(ethylene glycol) (PEG) bisazide photo-crosslinking agent into the p-type semiconducting polymers as a hydrophilic active channel in accumulated-mode OECTs. Upon incorporation of PEG segments into conjugated polymers via photolithography, the resulting OECTs exhibit a significant enhancement in both \u00b5C* product and doping\/de-doping dynamics by at least one order of magnitude. The photo-patterning of an ion-conducting semiconductor channel with a minimum line gap of 5 \u00b5m enables the fabrication of a depletion-mode inverter. This study presents a straightforward patterning process that enhances the hydrophilicity of various hydrophobic conjugated polymers while eliminating the need for complex synthesis procedures typically required for introducing ethylene glycol side chains on conjugated polymers.<\/jats:p>","DOI":"10.3390\/polym18172057","type":"journal-article","created":{"date-parts":[[2026,8,25]],"date-time":"2026-08-25T09:04:30Z","timestamp":1787648670000},"page":"2057","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Photo-Patternable Organic Electrochemical Transistors with Hydrophilic and Hydrophobic Bulk Heterojunction Enabled by Ethylene Glycol-Based Photo-Crosslinker"],"prefix":"10.3390","volume":"18","author":[{"given":"Gu-Hao","family":"Cai","sequence":"first","affiliation":[{"name":"Department of Photonics, National Cheng Kung University, Tainan 70101, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yun-Cheng","family":"Guo","sequence":"additional","affiliation":[{"name":"Department of Photonics, National Cheng Kung University, Tainan 70101, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sin-Rong","family":"Huang","sequence":"additional","affiliation":[{"name":"Department of Photonics, National Cheng Kung University, Tainan 70101, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Po-Hsiang","family":"Fang","sequence":"additional","affiliation":[{"name":"Department of Photonics, National Cheng Kung University, Tainan 70101, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5746-2885","authenticated-orcid":false,"given":"Jung-Yao","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Photonics, National Cheng Kung University, Tainan 70101, Taiwan"},{"name":"Academy of Innovative Semiconductor and Sustainable Manufacturing, National Cheng Kung University, Tainan 70101, Taiwan"},{"name":"Meta-nano Photonics Center, National Cheng Kung University, Tainan 70101, Taiwan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2883","DOI":"10.1021\/ma102286m","article-title":"Manipulation on the Morphology and Electrical Properties of Aligned Electrospun Nanofibers of Poly(3-hexylthiophene) for Field-Effect Transistor Applications","volume":"44","author":"Chen","year":"2011","journal-title":"Macromolecules"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1700616","DOI":"10.1002\/marc.201700616","article-title":"Stretchable Fluorescent Polyfluorene\/Acrylonitrile Butadiene Rubber Blend Electrospun Fibers through Physical Interaction and Geometrical Confinement","volume":"39","author":"Hsieh","year":"2018","journal-title":"Macromol. 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