[21a-S011-1~12] 17.2 Graphene

▲ [21a-S011-9] Facile preparation and thermoelectric properties of reduced graphene oxide

〇(DC)Pandiyarasan Veluswamy¹, Wanami Masaya¹, Shanthi Selvaraj¹, Salleh Faiz², Archana Jeyaram¹, Navaneethan Mani¹, Hayakawa Yasuhiro¹, Hiroya Ikeda¹ (1.Shizuoka Univ, 2.Univ. of Malaya)

Keywords:rGO,Thermoelectric properties

This report demonstrates application of reduced graphene oxide (rGO) for wearable thermoelectric generators. The rGO is prepared by a simple hydrothermal method, in which polyethylenimine (PEI) and potassium hydroxide (KOH) is used as a reducing agent of graphene oxide (GO) grown by the modified Hummers method. In literatures, the structural and morphological studies reveal the degree of reduction, which is also verified by the D-band/G-band ratio in Raman spectra (I_D/I_G). The sp²/ sp³ ratio in X-ray photoelectron spectroscopy (XPS) of RGO indicates a significant increase in the intensity of C=C bond character, while the oxygen content decreases manifestly after the reduction is complete [1-4]. In this report, we focus on p-type and n-type thermoelectric characteristics.