Researchers at China's Wuhan University of Technology, Huazhong University of Science and Technology and Jinan Municipal Bureau of Industry and Information Technology have developed a novel playdough-like graphite putty as top electrode for perovskite solar devices. The electrode is malleable and so can form good contact with the hole-transporting layer and the conductive substrate at room temperature using a simple pressing technique, which facilitates the fabrication of both small-area devices and perovskite solar modules.
Carbon-based perovskite solar cells (C-PSCs) are promising candidates for large-scale photovoltaic applications due to their theoretical low cost and high stability. However, the fabrication of high-performance C-PSCs with large-area electrodes remains challenging. In their recent research, the team showed that corresponding small devices and modules can achieve efficiencies of 20.29% (∼0.15 cm2) and 16.01% (∼10 cm2), respectively. Moreover, they analyzed the limitations of the optical and electrical properties of this playdough-like graphite electrode on the device performance, suggesting a direction for further improvement of C-PSCs in the future.