Molecular Precursors for ZnO Nanoparticles: Field-Assisted Synthesis, Electrophoretic Deposition, and Field-Effect Transistor Device Performance.
Molecular Precursors for ZnO Nanoparticles: Field-Assisted Synthesis, Electrophoretic Deposition, and Field-Effect Transistor Device Performance.
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DOI：
10.1021/acs.inorgchem.7b01088
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发表时间：
2017-06
影响因子：
4.6
通讯作者：
R. Hoffmann;Shawn Sanctis;J. J. Schneider-J.
中科院分区：
文献类型：
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作者：
R. Hoffmann;Shawn Sanctis;J. J. Schneider-J.
多齿Schiff碱锌配合物是微波辅助转化ZnO的合适前驱体。在四氢呋喃中，由二亚胺配体与二乙基锌直接反应，合成了高纯度和高收率的[双（乙酰丙酮基）乙二亚胺]锌（II）和[双（甲基乙酰乙酰基）乙二亚胺]锌（II）。通过热重法结合在线红外光谱研究了热衰减。在乙氧基乙醇中的陶瓷化反应产生具有非常小的粒径（约5-6 nm）的球形ZnO纳米颗粒的稳定分散体，其可用于涂覆和薄膜沉积工艺。由这些半导体ZnO颗粒制成的薄膜组成的场效应晶体管（FET）在350和450 °C下处理后的载流子迁移率分别为6.0 × 10-3和5.4 × 10-2 cm 2/（V s）。电泳沉积提供由这些ZnO纳米颗粒组成的致密膜涂层，其厚度为30-90 nm，在ITO（氧化铟锡）玻璃电极上。在这些分散体中的ZnO纳米颗粒的正介电电位与阴极处的电涂过程一致。
Zinc complexes with multidentate Schiff base ligands are suitable precursors for ZnO in microwave-assisted transformation reactions. [Bis(acetylacetonato)ethylenediimine]zinc(II) and [bis(methylacetoacetato)ethylenediimine]zinc(II) have been synthesized with high purity and good yield from the direct reaction of the respective diimine ligand with diethylzinc in tetrahydrofuran. The thermal decay is studied by thermogravimetry coupled with online infrared spectroscopy. The ceramization reaction in ethoxyethanol yields stable dispersions of spherical ZnO nanoparticles with very small particle sizes (around 5-6 nm), which can be employed for coating and thin-film deposition processes. Field-effect transistors (FETs) composed of thin films fabricated from these semiconducting ZnO particles possess charge-carrier mobilities of 6.0 × 10-3 and 5.4 × 10-2 cm2/(V s) after processing at 350 and 450 °C, respectively. Electrophoretic deposition affords dense film coatings composed of these ZnO nanoparticles with thicknesses of 30-90 nm on ITO (indium tin oxide) glass-electrodes. The positive ζ-potentials of the ZnO nanoparticles in these dispersions are in agreement with the electrocoating process at the cathode.