Low-temperature preparation of crystallized graphite nanofibers for high performance perovskite solar cells

摘要： Integration of two-dimensional graphite nanosheets into one-dimensional graphite nano?bers is essential for deep application of graphite materials. Here, we report preparation of crystallized graphite nano?bers by nozzle-less electrospinning and subsequent low-temperature heat treatment (500 °C). Depending on this graphitized one-dimensional nanostructure, we ?rst apply the graphite nano?bers as sca?old for perovskite solar cells (PSCs), which would provide a charge transfer highway in the light absorb layer and then improve the performance of devices. A high power conversion e?ciency of 18.23% was recorded for the graphite nano?bers based PSC with high ?ll factor of 76%.