【摘要】 利用电化学沉积法,通过调节电解液浓度、时间、温度等因素,在氧化铟锡(ITO)导电玻璃上制备了形貌不同的氧化锌(ZnO)纳米薄膜.通过X射线衍射、扫描电镜、透射电镜、光致发光谱等测试手段对不同形貌的ZnO纳米薄膜进行了表征和研究.研究表明,在高于阈值电压的情况下氧化锌薄膜迅速生成,微观形貌主要受电解质溶液的浓度影响,随着电解质浓度的升高可分别获得胞芽状、棒状、片层状结构,结合晶体生长理论探讨了不同形貌ZnO薄膜的成因.室温光致发光谱显示片状的ZnO纳米薄膜在近带边有较强的宽化激发峰,而可见区的发光峰受到明显抑制,这一结构有望应用于光电器件、传感器等领域.更多还原

【Abstract】 Different types of zinc oxide(ZnO) nanostructures were prepared by electrochemical synthesis on an indium tin oxide(ITO) glass substrate by adjusting the concentration of the electrolyte,deposition time and tem-perature.X-ray diffraction(XRD),scanning electron microscope(SEM),high resolution transmission electron mi-croscope(HRTEM) and photoluminescence(PL) spectrum were to determine the characteristics of these ZnO nano structures.The results show that ZnO films is formed quickly at the voltage over a threshold.The ZnO films mor-phologies are determined by the concentration of the electrolyte.Nanobuds,nanorods,flakes can be obtained in turn with the concentration of Zn(NO3)2.6H2O increasing.Such different morphology formation mechanisms are dis-cussed on the basis of crystal growth theory.The PL spectra of the samples show that the flake ZnO films have a significant widen near edge emission peak with the depressed visible emission,which may have potential applica-tions on optoelectronic devices and sensors.更多还原