印制电子用新型无颗粒型氧化锌墨水的制备与表征

Fabrication and Characterization of Particle-free Zinc Oxide Ink for Printed Electronic Application

以二水合乙酸锌为原料,乙二胺为络合剂,无水乙醇为溶剂,乙基纤维素为助剂制备了无颗粒ZnO功能墨水,并将该墨水旋涂于玻璃基板上,在加热板上不同温度固化30 min,并通过X射线衍射仪、场发射扫描电子显微镜、红外光谱仪、同步热分析仪、紫外-可见分光光度计以及透射电子显微镜对合成的墨水和生成的薄膜进行表征。结果表明：无颗粒ZnO导电墨水的分解温度远远低于乙酸锌前驱体的分解温度;经300℃固化30 min的薄膜表面平整,颗粒大小均匀,结晶性良好,透过率高达80%。墨水喷墨打印于PI柔性基板300℃固化30 min后的图案表面平整光滑、轮廓清晰,在印制电子方面有良好的应用前景。

A particle-free Zn O functional ink was prepared by using zinc acetate dihydrate as raw material, ethanediamine as a complexing agent, ethyl alcohol as a solvent and ethyl cellulose as an additive. The ink was spin-coated on a glass substrate and cured on a hot plate at different temperatures for 30 min. The synthesized ink and the cured-films on glass substrate were analyzed by X-ray diffraction, field emission scanning electron microscopy, Fourier transform infrared spectroscopy, simultaneous thermal analysis, ultraviolet-visible spectroscopy and transmission electron microscopy, respectively. The decomposition temperature of particle-free ZnO ink is lower than that of zinc acetate dehydrate precursor. The ZnO films cured at 300 ℃ for 30 min consist of uniform particles with a relatively high crystallinity, and show a smooth surface. The cured-film achieves a high transmittance of over 80% in a visible wavelength range. The inkjet-printed patterns on PI substrate cured at 300 ℃ for 30 min show distinct boundaries with a low roughness. The particle-free ZnO ink developed has promising applications in printed electronics industry.