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Interface construction for charge transportation of ZnO/graphene multilayer films
Functional Materials Letters ( IF 1.3 ) Pub Date : 2021-08-17 , DOI: 10.1142/s1793604721500272
Fang Fang 1 , Junsheng Wu 1 , Yanwen Zhou 1 , Zhuo Zhao 1
Affiliation  

In order to clarify the effect of interface construction on the charge transportation, the interfaces between zinc oxide (ZnO) and graphene layers were designed into the following types: the smooth interface by direct deposition ZnO layer onto the surface of fresh graphene/glass substrate; the nanoscale rough interface by Ar+ bombardment etching the surface of graphene/glass substrate before deposition of a ZnO layer, and rough ZnO/Ag/graphene interface by deposition Ag first and then ZnO layers on the rough graphene/glass substrate. The results showed that, compared to the morphology of the ZnO/graphene film with smooth surface, the particle sizes of the film with rough interface became fine and their shapes changed from sharp to round. The carriers’ mobility increased from 0.3 cm2 ⋅ V1 ⋅ s1 to 0.6 cm2 ⋅ V1 ⋅ s1 due to the enhancement of the nanocontact at the rough interface between ZnO and graphene layers. In order to improve the electrical properties of ZnO/graphene multilayer film, a 10 nm Ag layer was inserted into the rough graphene/glass and ZnO layer to construct the rough metal interface. The carrier concentration was enhanced from 1020 cm3 of ZnO/graphene to 1023 cm3 ZnO/Ag/graphene films, although the carrier mobility reduced slightly from ZnO/graphene 0.6 to ZnO/Ag/graphene 0.2 cm2 ⋅ V1 ⋅ s1. The sheet resistance and resistivity of the ZnO/Ag/graphene multilayer film decreased dramatically by inserting the conductive Ag layer, which took the roles of both the provider of charge carriers from Ag layer and bridges of the carriers from graphene layer.

中文翻译:

用于 ZnO/石墨烯多层薄膜电荷传输的界面结构

为了阐明界面构造对电荷传输的影响,氧化锌(ZnO)和石墨烯层之间的界面设计为以下类型:通过在新鲜石墨烯/玻璃基板表面直接沉积ZnO层的光滑界面;Ar的纳米级粗糙界面+在沉积 ZnO 层之前轰击蚀刻石墨烯/玻璃基板的表面,并在粗糙的石墨烯/玻璃基板上先沉积 Ag,然后再沉积 ZnO 层,从而形成粗糙的 ZnO/Ag/石墨烯界面。结果表明,与表面光滑的ZnO/石墨烯薄膜的形貌相比,界面粗糙的薄膜粒径变细,形状由尖变圆。载流子的迁移率从 0.3 cm 2 ⋅ V-1⋅ 小号-1至 0.6 cm 2 ⋅ V-1⋅ 小号-1由于在 ZnO 和石墨烯层之间的粗糙界面处的纳米接触的增强。为了提高 ZnO/石墨烯多层膜的电学性能,在粗糙的石墨烯/玻璃和 ZnO 层中插入 10 nm Ag 层,构建粗糙的金属界面。载流子浓度从 1020厘米-3的 ZnO/石墨烯到 1023厘米-3ZnO/Ag/石墨烯薄膜,尽管载流子迁移率从 ZnO/石墨烯 0.6 略微降低到 ZnO/Ag/石墨烯 0.2 cm 2 ⋅ V-1⋅ 小号-1. 通过插入导电Ag层,ZnO/Ag/石墨烯多层膜的薄层电阻和电阻率显着降低,该层既充当Ag层电荷载流子的提供者,又充当石墨烯层载流子的桥接作用。
更新日期:2021-08-17
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