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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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Chinese Journal of Chemistry 2016年第11期34卷 1103-1108页

作者： Hayoung Jeon Seonuk Park Sooji Nam kwonwoo shin Sung-Ryong Kim Se Hyun Kim Jaeyoung Jang Tae Kyu An POSTECH Organic Electronics Laboratory Polymer Research Institute Department of Chemical Engineering Pohang University of Science and Technology Pohang 790-784 Republic of Korea Smart I/O Control Device Research Section Electronics and Telecommunications Research Institute Daejeon 305- 700 Republic of Korea Nano Materials & Components Research Center Korea Electronics Technology Institute (KET1) Seongsam-si Gyeonggi-do 13509 Republic of Korea Department of Polymer Science & Engineering Korea National University of Transportation 50 Daekak-Ro Chungju 27469 Republic of Korea School of Chemical Engineering Yeungnam University 280 Daehak-Ro Gyeongsan Gyeongbuk 38541 Republic of Korea Department of Energy Engineering Hanyang University Seoul 133-791 Republic of Korea

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 02 and UV-light. Moreover, when used as passivation layers, they enhanced the stability of pen- tacene OTFT devices exposed to air and UV radiation.

关键词： polymer-clay passivation layer-by-layer montmorillonite long-term stability

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Novel Intense-pulsed-light synthesis of amorphous SnO_(2)electron-selective layers for efficient planar MAPbI_(3)perovskite solar cells

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Journal of Materials Science & Technology 2021年第33期92卷 171-177页

作者： kwonwoo Oh Kyungeun Jung Jaehak shin Sunglim Ko Man-Jong Lee Department of Chemistry Konkuk UniversitySeoul 143-701Republic of Korea Department of Advanced Technology Fusion Konkuk UniversitySeoul 143-701Republic of Korea Department of Mechanical Design and Production Engineering Konkuk UniversitySeoul 143-701Republic of Korea

Although perovskite solar cells(PSCs)have achieved a high power conversion efficiency(PCE)within a short period of development,the high-temperature sintering of the constituent electron-selective layers(ESLs)impedes the *** this report,we demonstrate the effectiveness of an intensepulsed-light(IPL)treatment for the rapid and damage-free sintering of amorphous-SnO_(2)ESLs for use in *** IPL treatment of amorphous-SnO_(2)substantially reduced the amount of surface hydroxyl groups,modified the surface energy,and enabled the growth of a low-stress perovskite layer with large grain sizes,all of which enhanced the photovoltaic properties and led to the proper alignment of band structures for efficient *** comprehensive optimization of the IPL conditions,a PCE of 17.68%was achieved from the MAPb I3 planar PSC based on an amorphous-SnO_(2)IPL treated for a few tens of seconds,which was significantly increased compared with a PCE(7.06%)of nontreated SnO_(2)based *** addition,the PCE of the IPL-treated SnO_(2)based PSC is comparable to the best PCE(18.16%)of PSCs fabricated with SnO_(2)ESL annealed for three hours at 185℃.Because of its ultrafast sintering time and tendency to not damage SnO_(2)ESLs,the new IPL process is expected to open new opportunities for the commercialization of PSCs.

关键词： Perovskite solar cells Intense pulsed light Amorphous SnO_(2) Electron-selective layer Internal stress

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