Microstructure and Properties of Ag-Doped ZnO Grown Hydrothermally on a Graphene-Coated Polyethylene Terephthalate Bilayer Flexible Substrate
Taotao Ai, Yuanyuan Fan, Huhu Wang, Xiangyu Zou, Weiwei Bao, Zhifeng Deng, Zhongguo Zhao, Miao Li, Lingjiang Kou, Xiaoming Feng, Mei Li
Abstract
Ag-doped ZnO nanorods growth on a PET-graphene substrate (Ag-ZnO/PET-GR) with different Ag-doped content were synthesized by low-temperature ion-sputtering-assisted hydrothermal synthesis method. The phase composition, morphologies of ZnO, and electrical properties were analyzed. Ag-doping affects the initially perpendicular growth of ZnO nanorods, resulting in oblique growth of ZnO nanorods becoming more obvious as the Ag-doped content increases, and the diameter of the nanorods decreasing gradually. The width of the forbidden band gap of the ZnO films decreases with increasing Ag-doped content. For the Ag-ZnO/PET-GR composite structure, the Ag-ZnO thin film with 5% Ag-doped content has the largest carrier concentration (8.1 × 10 18 cm −3 ), the highest mobility (67 cm 2 · V −1 · s −1 ), a small resistivity (0.09 Ω·cm), and impressive electrical properties.