Photovoltaic Performance And Chromaticity Evaluation Of Semitransparent Perovskite Solar Cells

Since the report of solar-to-electricity conversion in 2009,the photoelectric conversion efficiency of perovskite solar cells has increased dramatically from an initial 3.8%to 25.2%.Although the efficiency of traditional perovskite solar cells is almost comparable to that of silicon solar cells,its chromaticity is not beautiful enough and cannot be applied to emerging areas such as photovoltaic curtains and photovoltaic-building integration.To meet the requirements in these areas,semitransparent perovskite solar cells are considered one of the most promising technologies.Semitransparent perovskite solar cells must not only ensure good photovoltaic performance,but also ensure beautiful chromaticity expression.In order to make it suitable for different life needs,it is necessary to find a balance between chromaticity and cell efficiency.You can change the color of the cell by changing the perovskite material and thickness to solve the problem of color rigidity.In this paper,the device structures of organic-inorganic hybrid and fully inorganic semitransparentt perovskite solar cells are optimized by simulation.The photovoltaic performance and chromaticity of these two types of devices are studied by changing the thickness of the perovskite layer.Moreover,the reliability of the simulation results of organic-inorganic hybrid semitransparent perovskite solar cells is also verified through experiments.The main contents are as follows:(1)The thickness of TeO2/Ag transparent electrode and CH3NH3PbI3-xClx layer of the CH3NH3Pbl3-xClx device is optimized through simulation.When the thickness of CH3NH3Pbl3-xClx is 500nm,the PCE at the top(bottom)is 20.81%(23.65%).When the thickness of the CH3NH3PbI3-xClx layer is 100 nm,it appears light yellow.When the thickness of the perovskite layer is 200 to 300 nm,it appears yellow.When the thickness of the perovskite layer is 400 to 500 nm,it appears orange.(2)The highest PCE obtained at the top(bottom)of the MA0.7FA0.3PbI3-xClx device treated with PEAI-treated in the experiment was 16.75%(20.25%).In addition,after adding a mirror during the test,the double-sided PCE can be increased to 22.51%(bottom)and 21.49%(top).(3)The thickness of TeO2/Ag transparent electrode and CsPbBr3-xIx layer of the CsPbBr3-xIx device is optimized by simulation.By changing the content of x,the ratio of Br and I of the all-inorganic perovskite layer can be changed,and finally all-inorganic semitransparent perovskite solar cells with different photovoltaic properties and chromaticities are obtained.When the thickness of the CsPbBrI2 layer is 500 nm,the simulated PCE of the top(bottom)is 15.99%(16.30%),which appears a red-orange color.At the same thickness,the PCE of the top(bottom)obtained from the CsPbBr2I device is 14.44%(14.55%),appearing orange.Similarly,the top(bottom)PCE obtained from the CsPbBr3 device is 10.48%(11.21%),which appears yellow.