*Department of Postgraduate Elementary Education, Universitas Negeri Jakarta, Indonesia
**Department of Elementary Education Teacher, Universitas PGRI Adi Buana, Indonesia
Abstract
The rising demand for optoelectronic devices makes the research widely develop in recent years. Flexibility, stretchability, and energy efficiency are important material properties in the devices, especially for Transparent Conductive Films (TCFs). Graphene is one of the highly promising materials for TCF due to its properties, such as outstanding electrical conductivity, good in chemical and thermal stability, high optical transparency, and remarkable mechanical flexibility. However, the development of these materials has limited to laboratory research. The difficulty of material synthesize for mass production is one of a challenge for the researcher to develop it. Many methods were used to develop graphene material such as Chemical Vapor Deposition (CVD), Epitaxial growth, and mechanical and chemical exfoliation graphene. The modified Hummer Method is one of the promising chemical exfoliation methods that produced graphite into graphene oxide. This method still needs one step to reduce the oxygen content on graphene oxide because it gives a poor effect both in electrical conductivity and optical transparency. Reductant materials are needed to solve the problem. This review presents the reductant materials that can be used to reduce the oxygen content of graphene oxide that support in the fabrication of TCFs.
