PEROVSKITE PHOTOVOLTAIC CELL INCLUDING METAL OXIDE NANOFIBER, NANORODS, AND COATING LAYER AS PHOTOELECTRODE, AND METHOD OF MANUFACTURING SAME

摘要

The present invention relates to a perovskite photovoltaic cell including a metal oxide nanofiber, nanorods, and a coating layer as a photoelectrode, and a method of manufacturing the same. More specifically, the present invention provides a perovskite photovoltaic cell, which comprises a first electrode, a blocking layer, a photoelectrode, a perovskite photoactive layer, a hole transport layer, and a second electrode. The photoelectrode includes: the metal oxide nanofiber; the metal oxide nanorods formed on the surface of the metal oxide nanofiber; and metal oxide coating layers formed on the surface of the nanofiber and the nanorods. The coating layers are coated to a thickness of 30 to 70 nm. The perovskite photovoltaic cell of the present invention includes the metal oxide nanofiber, the nanorods, and the coating layer as the photoelectrode, and the photoelectrode has a high specific surface area and suppresses the recombination of the excited charges at the same time, and can move more easily. Therefore, the perovskite photovoltaic cell of the present invention is easier to collect charges than conventional photoelectrodes containing nanoparticles with many interfaces. In addition, due to the vacancies of the nanofibers and the nanorods, the coating of the light absorbing layer can be easily performed to enhance the interfacial contact, thereby improving the photoelectric conversion efficiency.;COPYRIGHT KIPO 2017