Preparation and Properties of Inorganic Perovskite CsPbBr3 Solar Cells

• Main Authors: LUO, ZHENG-MING, 羅政銘
• Other Authors: LEU, ING-CHI
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/x528z2

碩士 === 國立臺南大學 === 材料科學系碩士班 === 107 === In the face of global energy crisis and environmental pollution, environmentally friendly and renewable energy is what everyone expects, and solar energy is a good choice. Perovskite solar cells, which have been experiencing rapid development since 2009, are one of the emerging materials that scholars have paid attention to in recent years. Their material properties have high photoelectric conversion efficiency, low preparation cost and low pollution. Properties, and organic-inorganic hybrid perovskite solar cells have so far approached the photoelectric conversion efficiency level of commercially available polycrystalline silicon solar cells. However, the organic-inorganic hybrid perovskite is easy to react with water and oxygen in the atmosphere, so that the life of the organic-inorganic hybrid perovskite solar cell is short. In this study, inorganic perovskite is used as the light absorbing layer, and the preparation of inorganic perovskite solar cells was discussed, and the influence of process parameters on cell characteristics and related mechanisms were clarified. The first part is to synthesize the CsPbBr3 light absorbing layer by a multiple spin coating method modified from the two-step solution method. Different spin coating speed and spin coating times are used to control the phase composition of the perovskite light absorbing layer, and its different photoelectric properties are discussed. The second part is to discusses the effect of polydimethylsiloxane (PDMS) anti-reflection layer made from different sandpaper on the transmittance of fluorine-doped tin oide (FTO) substrate. The effect of PDMS layer on the performance of inorganic perovskite solar cells is discussed. The third part is to return to the method of making the light absorbing layer. In order to reduce the temperature of the whole process, the research uses IR irradiation instead of heat treatment to discusses the formation of perovskite layer and their photoelectric properties. The results show that the inorganic perovskite solar cell fabricated by multiple spin coating method can control the phase composition of inorganic perovskite by using different spin coating speed and number of spin coating. The best experimental parameter is 2000 rpm five times deposition of PbBr2 solution. The CsPbBr3 inorganic perovskite, which is closest to the pure phase in the product, can be obtained with an efficiency of up to 4.03%. The PDMS anti-reflective layer cast on the 240C sandpaper combined with FTO can improve light penetration and obtain the highest tranmittance. The highest penetration in the visible range is 88%, and the haze is as high as 84.24%. The photoelectric conversion efficiency of the all-inorganic perovskite perovskite solar cell is increased to 4.56% from 4.03%. At the same time, in this study the use of IR-assisted growth of all-inorganic perovskite light-absorbing layer was successful to prepare all-inorganic perovskite solar cells in a low-temperature environment below 400C, and the photoelectric conversion efficiency was up to 1.19%. The proposed IR-assisted method can help the use other low temperature substrate materials for flexible all-inorganic perovskite solar cells.