Perovskite solar cell based on composite hole transport layer and preparation method thereof

The invention provides a perovskite solar cell based on a composite hole transport layer and a preparation method thereof, and belongs to the technical field of perovskite solar cells. The composite hole transport layer comprises a PEDOT:PSS layer, and the PEDOT:PSS layer is provided with a hole modification layer, the hole modification layer is a film prepared from amphiphilic molecules, two endsof the amphiphilic molecules are respectively polar groups and non-polar groups, and the amphiphilic molecules further comprise ester groups. According to the perovskite solar cell provided by the invention, the conductivity of the PEDOT:PSS layer is improved, the interface energy level matching of the PEDOT:PSS and the perovskite active layer is improved, meanwhile, ester groups in amphiphilic molecules inhibit the defects generated on the interface, carrier capture sites are reduced, and the energy conversion efficiency of the perovskite solar cell is greatly improved. 本发明提供一种基于复合空穴传输层的钙钛矿太阳电池及其制备方法，属于钙钛矿太阳电池技术领域。其