摘要： This chapter highlighted the research on the use of graphene and graphene-based nanocomposite materials in the photoanode of DSSCs. Graphene-based materials, such as pristine graphene, graphene oxide, and reduced graphene oxide and graphene quantum dots possess attractive properties for various components of DSSC photoanode. The graphene-based nanocomposite materials showed different functionalities such as electron conducting layer, transparent conducting electrode, and sensitizer in the DSSC photoanode. When combined with other nanomaterials of metal, metal oxides, metal sulfides, etc., to form a nanocomposite due to synergetic effects few interesting properties are also emerged which enhanced the photovoltaic performances of DSSCs. From the above discussion, it is clear that graphene and its nanocomposites have the properties that are well suited for the purpose of making high-performance photoanode for DSSC. But, there is still lake of extensive studies on the graphene-based nanocomposite materials in the DSSC photoanode as compared to the applications toward counter electrode. Hence, an in-depth research on modification of DSSC photoanode employing graphenebased materials needs to be carried out. Particularly, the synthesis protocols for graphene-based materials with tunable morphology and adjustable properties and their better incorporation into other components to enhance the photoanode performance. On the other hand, loading of graphene-based material on to the host also greatly influence the performance of the cells, hence meticulous calculation on the amount of materials and characterization of their physical and chemical properties can play important roles in solving many issues limiting the performance of DSSC photoanodes. When graphene is used as a transparent conducting electrode, the major issue is to maintain the transparency. The unsatisfactory transparency is caused by multiple-layer graphene stacking and the high sheet resistance due to surface defects and oxidization. Better processing procedures are necessary to overcome these problems and enhance the chance for graphene to be used as feasible alternatives to TCOs in the DSSC photoanode. The strength and flexibility of graphene outperforms other flexible candidates. Further modification of graphene nanosheets may create a new generation of flexible electrodes. Considerable progress has been made on the preparation of graphene transparent conducting electrodes at the laboratory level; however, it remains a challenge to cost-effectively produce high-quality graphene on an industrial scale for the practical use of graphene in transparent conducting electrodes.