Perovskite solar cell with conducting polymer as back electrode and preparing method of perovskite solar cell

Abstract

The invention provides a perovskite solar cell with a conducting polymer as a back electrode and a preparing method of the perovskite solar cell and relates to solar cells. The perovskite solar cell is provided with a transparent conducting glass substrate, an isoelectronic transmission layer, a light absorption perovskite material layer and a conducting polymer back electrode layer from bottom to top in sequence. The preparing method comprises the steps that the transparent conducting glass substrate is preprocessed; the isoelectronic transmission layer is prepared on the preprocessed transparent conducting glass substrate; a DMF solution of PbI2 is prepared, the isoelectronic transmission layer is coated with the DMF solution of the PbI2 in a spinning mode, and a yellow PbI2 thin film is obtained; the yellow PbI2 thin film is coated with a polyaniline nanowire ethanol solution in a spinning mode, and a loose porous thin film, namely the conducting polymer back electrode, is obtained; an isopropanol solution of methylamine is added on the conducting polymer back electrode, standing and heating are conducted, and the perovskite solar cell with the conducting polymer as the back electrode is obtained. The conducting polymer prepared at the lower temperature is used as the back electrode, evaporation is not needed, the technology is simple, the preparation cost is low, and mass preparation is easy.

Description

technical field [0001] The invention relates to a solar cell, in particular to a perovskite solar cell with a conductive polymer as a back electrode and a preparation method thereof. Background technique [0002] With the development of the global economy, more and more energy is consumed, among which oil resources are becoming less and less, and the energy problem will definitely become a major problem in the future. Solar energy is a renewable resource and is inexhaustible, so the development of solar cells is of great significance. But today's solar cells either have low photoelectric conversion efficiency or are too expensive. At present, silicon solar cells have high efficiency, but high temperature and high vacuum are required in the preparation process, and the cost is very high. Organic polymer solar cells have the characteristics of low cost, non-toxicity, easy preparation, and large-area flexible manufacturing, but their photoelectric conversion efficiency is sti...

AI Technical Summary

Problems solved by technology

[0004] Currently, based on CH 3 NH 3 PB 3 The perovskite battery usually adopts Ag (Perovskite solar cells with a planar heterojunction structure prepared using room-temperature solution processing techniques, Dianyi Liu1, & Timothy L.Kelly1, Nature Photonics, 2014, 8:133–138.), Au( Squential deposition as a route to high-performance perovskite-sensitized solar cells, Julian Burschka, Norman Pellet, Soo-Jin Moon, Robin Humphry-Baker, Peng Gao, Mohammad K. Nazeeruddin, & Michael Gr¨atzel, Nature 2013, 499:316 -319.) metal or C (Chinese patent 201410204305) as the back electrode; but Ag, Au and other metals need to be evaporated in vacuum, and C as the back electrode usually needs to be sintered at a temperature of up to 500 ° C, and the process is more complicated

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