Facile Fabrication and Characterization of Free-Hole Perovskite Solar Cell Based on Carbon Electrode

Free-hole perovskite solar cell without precious metals electrode are the chief toward large scale and low cost production of perovskite solar cells, and thus commercialization. In this study, TiO2/CH3NH3PbI3/C devices were fabricated in air using carbon as a counter electrode with the aid of the facile doctor blade technique, which simplifies the processing and lowers the threshold of fabrication process. Three different approaches were used to deposit the carbon paste and finalize the perovskite devices. The structure and microstructural of the perovskite layers were studied using XRD and FTIR. The photovoltaic performance were studied, for the devices fabricated by different method, and it was found that, the way to deposit the carbon paste has a great influence on the power conversion efficiencies and devices reproducibility.