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Spin Self‐Assembled Clay Nanocomposite Passivation Layers Made from a Photocrosslinkable Poly(vinyl alcohol) and Na+‐Montmorillonite Enhance the Environmental Stability of Organic Thin‐Film Transistors |
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| Authors: | Hayoung Jeon Seonuk Park Sooji Nam Kwonwoo Shin Sung‐Ryong Kim Se Hyun Kim Jaeyoung Jang Tae Kyu An |
| Institution: | 1. POSTECH Organic Electronics Laboratory, Polymer Research Institute, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790‐784, Republic of Korea;2. Smart I/O Control Device Research Section, Electronics and Telecommunications Research Institute, Daejeon, 305‐700, Republic of Korea;3. Nano Materials & Components Research Center, Korea Electronics Technology Institute (KETI), Seongsam‐si, Gyeonggi‐do, 13509, Republic of Korea;4. Department of Polymer Science & Engineering, Korea National University of Transportation, 50 Daehak‐Ro, Chungju, 27469, Republic of Korea;5. School of Chemical Engineering, Yeungnam University, 280 Daehak‐Ro, Gyeongsan, Gyeongbuk 38541, Republic of Korea;6. Department of Energy Engineering, Hanyang University, Seoul, 133‐791, Republic of Korea |
| Abstract: | We investigated the effects of the multilayer polymer‐clay nanohybrid passivation films on the stability of pentacene organic thin‐film transistors (OTFTs) exposed to air and UV irradiation. Well‐ordered multilayer films were deposited by the spin‐assisted layer‐by‐layer assembly method using photocrosslinkable poly(vinyl alcohol) with the N‐methyl‐4(4′‐formylstyryl)pyridinium methosulfate acetal group (SbQ‐PVA) and Na+‐montmorillonite in a water‐based solution process. When photocrosslinked, these SbQ‐PVA/clay multilayers were found to serve as excellent barriers to O2 and UV‐light. Moreover, when used as passivation layers, they enhanced the stability of pentacene OTFT devices exposed to air and UV radiation. |
| Keywords: | polymer‐clay passivation layer‐by‐layer montmorillonite long‐term stability |