1.College of Chemistry， Chemical Engineering and Life Sciences， Wuhan University of Technology， Wuhan 430070， China；2.School of Materials Science and Engineering， Wuhan University of Technology， Wuhan 430070， China
Abstract：In high-efficiency perovskite solar cells (PSCs)， noble metal counter electrodes (Au， Ag) and expensive hole transport materials (HTM) are usually used， resulting in high cost and instability. This study used stable HTM-free PSCs with CsPbBr3 pure inorganic perovskite. The natural nano-biomaterial bacterial cellulose (BC) with excellent structure was carbonized at high temperature to obtain a mesoporous carbonized bacterial cellulose (CBC) material with nano-fine structure， large surface area and pore volume. In order to confirm the potential of the material as the counter electrode of PSCs， the material was tested by SEM， XRD， FT-IR， specific surface area， and electrical conductivity. According to the application requirements of the counter electrode of PSCs， CBC and its mixture with commercial conductive carbon paste (CS) were used as the counter electrode material of PSCs. Through J-V， IPCE and other tests， it is found that the battery efficiency of pure CBC is higher than that of pure CS. CBC has great potential as the counter electrode of PSCs. This research not only expands the application of CBC as the counter electrode of PSCs， but also provides use CBC as a potential low-cost， stable and efficient counter electrode material of PSCs.
2021, Vol. 55 
