Preparation and Optoelectric Properties of Few-Layer Reduced Graphene Oxide Conjugated with Self Welding Silver Nanowire Junctions as Flexible Transparent Conducting Hybrid Films

• Main Authors: CHIANG, PIN-HSUAN, 江品璇
• Other Authors: HSIEH, TAR-HWA
• Format: Others
• Language: zh-TW
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/m676a4

碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 106 === In this study, flexible transparent conducting hybrid films (TCFs) based on few layer reduced graphene oxide (FrGO) conjugated with hydrolyzed-polyethylene terephthalate (H-PET)-based self-welding (SW) commercial silver nanowires (AgNWs) were fabricated by water-bath assisted dipping coating method. H-PET-based SW-AgNW networks were controlled by the mirror silver reaction with different reaction rates and followed by dip-coated on the H-PET film. Few layer graphene oxide (FGO) were prepared by modified Hummers and low speed centrifuge method. FrGO/SW-AgNW TCFs were further prepared by reduced under sodium borohydride and followed by dip-coated on the H-PET-based SW- AgNWs. Effects of mirror silver reaction rate and FrGO layer on the conducting networks, surface morphology, sheet resistance and transmittance of FrGO/SW-AgNW TCFs are systematically studied. The interaction between AgNWs and FrGO was also further discussed. Results showed that SW-AgNW TCFs can be successfully prepared by water-bath assisted dip-coated and mirror silver reaction. As for optical and electrical characteristics analysis, the gain value of transmittance (GPS) can reach 1.88% (the transmittance is slightly increased from 76.06% to 77.49% ) which induced by the self-welding effect. However, GPS value is decreased with increasing the mirror silver reaction temperature and time. The Gain values of sheet resistance (GES) exhibit mostly negative in nature, the maximum value of GES can remark reduce to 61.06%, confirm the truth of mirror silver reaction with the excellent self-welding effect, as well GES value is also decreased with decreasing the mirror silver reaction temperature and time. Furthermore, the results revealed that FrGO/SW-AgNW TCFs can be successfully prepared by water-bath assisted dip-coated. As for optical and electrical analysis, the gain value of transmittance (GPF) can reach 1.92% (the transmittance is slightly increased from 70.80% to 72.16%). The gain value of sheet resistance (GEF) can remark reduce to 59.9% (the sheet resistance dramatically dropped from 123.6 Ω/sq to 49.5 Ω/sq). For Raman and XPS analysis, the charge transfer behavior between FrGO and SW-AgNWs is observed, which attributed to the bridging effect between FrGO and SW-AgNWs, leading to the increase the number of conductive paths in the networks.