Photovoltaic Wire Derived from a Graphene Composite Fiber Achieving an 8.45 % Energy Conversion Efficiency

摘要

Photovoltaic devices are typically made of rigid plates that are unfavorable for applications that require flexibility, for example, portable and highly integrated devices. Therefore, the development of flexible organic photovoltaics has recently become the subject of research as a possible solution for these applications.1 However, the flexible films described do not meet many of the requirements, for example, they are not weaveable and cannot be used for electronic textiles, which represent a mainstream future development. As a result, flexible wire devices have begun to attract attention, and some attempts to make wire-shaped photovoltaics have been discussed in the recent years. However, photovoltaic wires suffer from poor performance and generally exhibit much lower energy-conversion efficiency than conventional planar photovoltaics; the metal wire, carbon fiber, or modified polymer fiber commonly used as electrodes are generally unable to fully meet the much stricter requirements of wire-based cells, including a complex interface, high flexibility, and high conductivity.