Preparation And Characterization Of Perovskite Photovoltaic Materials And Devices

Solar energy is one of the world’s most abundant energy resources. One year’s sunlight can provide the energy which is one hundred times more than existing energy of fossil fuel resources in the world, so solar energy could supply endless energy to us. From the long-term’s research, people found that the photovoltaic cell is the most promising method, which is used to convert photons to electricity directly. The thin film solar cell based on organic inorganic hybrid perovskite (CH3NH3PbI3) emerged recent as one of most promising candidates which satisfies the highly effective and low cost of production. The fabrication technique of perovskite solar cell and related research on its material, physical and chemical properties are attracting great deal of interest now.In this work, in order to understand the relationship of photoelectric conversion efficiency of the organic-inorganic hybrid perovskite solar device and the crystal structure of perovskite layer as well as the spectral characteristics. We did a series of characterization of perovskite film, including XRD, SEM which could analyze the crystal structure of organic-inorganic hybrid perovskite materials, and the test of ultraviolet absorption, photoluminescence, optical absorption spectrum could do the spectral analysis for hybridization perovskite materials. Through our analysis, we obtain the basic photoelectric properties of films and devices and provide a physical basis for the preparation of the device. After that, we succeeded in preparation of organic inorganic hybrid perovskite thin films and optoelectronic devices. Besides, we tested the current, voltage characteristic of the device to get some of the photoelectric conversion efficiency. At last, we tested its stability in the air.With the improvement of our technology level, the photoelectric conversion efficiency is also increasing, but it has certain difference with the current international level, so we need more systematic study about relationships between thin film surface morphology and the electro-optical properties, and we need further the understanding of physical phenomena of optical excitation. Our work may help increasing the conversion efficiency of perovskite solar cell in future.