使用可溶液加工的高κ无机聚合物混合电介质的低电压有机场效应晶体管

IF 2.6 3区 物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Physica Scripta Pub Date : 2024-09-15 DOI:10.1088/1402-4896/ad7648
Bin Rong, Wei Zhao, Yi Liao, Yixiao Zhang, Yangyang Zhu, Wei Shi and Bin Wei
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引用次数: 0

摘要

通过溶液处理技术,制备了混合高κ无机 Al2O3 和聚合物电介质(包括聚乙烯醇 (PVA)、聚苯乙烯 (PS) 或聚甲基丙烯酸甲酯 (PMMA))的有机场效应晶体管 (OFET)。分析表明,Al2O3 和 PVA 的高表面能和亲水性以及 PS 表面相对疏水的特性阻碍了相应 OFET 的性能。通过分析 OFET 的漏电流、电容、接触电阻和陷阱密度等特性,我们发现 PMMA 接合薄膜具有优化的电学特性。PMMA 的引入消除了界面陷阱,从而降低了阈值电压,提高了器件的性能。COMSOL 多物理场仿真证实了这一物理机制。利用 Al2O3/PMMA 混合电介质的策略可同时确保 OFET 的低工作电压和良好性能,同时通过厚 PMMA 保证低漏电流。
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Low-voltage organic field-effect transistors by using solution-processable high-κ inorganic-polymer hybrid dielectrics
Organic field-effect transistors (OFETs) incorporating hybrid high-κ inorganic Al2O3 and polymer dielectrics, including polyvinyl alcohol (PVA), polystyrene (PS), or polymethyl methacrylate (PMMA), through solution-processing techniques were fabricated. The analyses revealed that the high surface energy and hydrophilicity property of Al2O3 and PVA, and the relatively hydrophobic property of PS surface, hindered the performance of corresponding OFETs. The Al2O3/PMMA-based OFET achieved the optimized performance, with a threshold voltage of −2.7 V, a hole carrier mobility of 0.056 cm2/Vs, and a current on/off ratio of 1.0 × 104 at a low operating voltage of −5 V. Through analyzing the characteristics of leakage current, capacitance, contact resistance, and trap density of OFETs, we found that the PMMA-engaged films possessed the optimized electrical properties. The introduction of PMMA eliminated the interfacial trapping, thereby lowering the threshold voltage and enhancing the performance of the device. The COMSOL Multiphysics simulation was conducted to confirm the physical mechanism. The strategy of utilizing Al2O3/PMMA hybrid dielectric could simultaneously ensure the low operating voltage and good performance of OFET, while guaranteeing the low leakage current by the thick PMMA.
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来源期刊
Physica Scripta
Physica Scripta 物理-物理:综合
CiteScore
3.70
自引率
3.40%
发文量
782
审稿时长
4.5 months
期刊介绍: Physica Scripta is an international journal for original research in any branch of experimental and theoretical physics. Articles will be considered in any of the following topics, and interdisciplinary topics involving physics are also welcomed: -Atomic, molecular and optical physics- Plasma physics- Condensed matter physics- Mathematical physics- Astrophysics- High energy physics- Nuclear physics- Nonlinear physics. The journal aims to increase the visibility and accessibility of research to the wider physical sciences community. Articles on topics of broad interest are encouraged and submissions in more specialist fields should endeavour to include reference to the wider context of their research in the introduction.
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