Improving the Interfacial Contact of Screen-Printed Carbon Electrodes for Perovskite Solar Cells

Carbon electrodes were developed for perovskite solar cells due to their low cost, superior stability, and solution processability. However, perovskite solar cells with carbon electrodes usually have relatively low power conversion efficiency, which can be related to the recombination process and charge transfer process at the interfaces of carbon electrodes. For the carbon electrodes printed at low temperature, CuSCN hole conductors can decrease the recombination process of devices. By incorporating screen-printed carbon black layers, the contact of electrode interfaces was improved and the charge transfer resistance of devices was decreased. As a consequence, the PCEs of devices were increased from 7.3 to 15.5%. In addition, the stability of devices was improved simultaneously.