Rachmat Hidayat
The economic growth in various countries, including Indonesia, has also give a negative impact on the global environment. With increasing the numbers of the middle-income population, the use of fuel for transportation and electricity for home appliance also significantly increase. It also increases the industrial activities which supply various goods and services. As a result, air pollution also rapidly increases in metro cities and their urban regions in various countries. The increasing CO2 emission can not be recycled by trees or plants that are very rare in most big cities. Therefore, we need artificial human-made devices to recycle CO2 gas. This proposed research work is aimed to develop a device to convert CO2 to other substances based on the photoelectrochemical cell (PEC) principle. The device uses solar energy and converts it to electrical energy that sufficiently enough for driving a redox reaction inside the cell. In this proposed work, we will use perovskites-based semiconductor materials and graphene. Both materials will be used in a composite form, where the graphene act as the mesoscale matrix to deliver the electrical transport to the perovskite nanocrystals. The perovskite nanocrystals behave like the light absorbers and catalytic agents. The research work is composed of experimental work for fabricating and characterizing the PEC cells and computational work for predicting the electronic properties of the perovskite materials used here.