碳化细菌纤维素在钙钛矿太阳能电池对电极中的研究

在高效的钙钛矿太阳能电池(PSCs)中，通常采用贵金属对电极(Au、Ag)和昂贵的空穴传输材料(HTM)，导致了高成本和不稳定等问题.该研究使用稳定的无HTM的CsPbBr3纯无机钙钛矿的PSCs，将结构优异的天然纳米生物材料细菌纤维素(BC)经过高温碳化得到具有纳米精细结构、大表面积和孔容的多介孔碳化细菌纤维素(CBC)材料，对该材料进行SEM、XRD、FT-IR、比表面积、电导率测试以证实该材料在PSCs上的应用潜质.根据PSCs对电极的应用需要，将CBC及其与商业导电碳浆(CS)混合物作为PSCs对电极材料，通过J-V、IPCE等测试，发现纯CBC材料的电池效率高于纯CS，在作为PSCs对电极方面具有很大的潜力.该研究不仅扩大了生物质碳材料的应用领域，而且有望将CBC作为低成本稳定高效PSCs对电极材料.

Research on carbonization bacterial cellulose as counter electrode of perovskite solar cells

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.