Breakthroughs in research on three-dimensional electrode dye-sensitized solar cells As humans gradually become aware of the effects of global climate change, many scientists are looking for alternative energy sources, among which solar cells are the most direct energy conversion technology, which converts sunlight Unlike electricity generated by burning coal, oil, or gas, it produces pollutants. At present, most research on solar cells is focused on silicon-based devices, but dye-sensitized solar cells are optimistic about the potential to replace silicon solar cells due to their low cost, especially in small areas. , High mobility or low energy intensive applications. Basically, a dye-sensitized solar cell is a type of electrochemical cell that uses light-absorbing dye placed on a layer of titanium dioxide to convert light energy into electrical energy. The more light is converted into electrical energy, the higher the conversion efficiency and performance of the solar cell. One of the important factors that determine the conversion efficiency is how quickly electrons can be transferred out of the titanium dioxide layer before recombination. For electrons to function in batteries, they must first be detached from the titanium dioxide layer. To achieve this, they must enter adjacent conductive glass electrodes of indium tin oxide (ITO). Recently, research teams in Taiwan and Australia have used wet chemical etching to create a three-dimensional electrode interface. The purpose is to maximize the area of ​​the interface between titanium dioxide and ITO to reduce the recombination rate of electron hole pairs and improve the conversion efficiency of solar cells. Their process involves electrophoretic deposition of oxidative precursors in the template, so that electrodes made of ITO nanowire arrays can be manufactured in a cost-effective manner. The researchers used an electron microscope to observe the structure of the nanowires and their array, and measured the performance of this solar cell. The results showed that the conversion efficiency of the three-dimensional electrode dye-sensitized solar cell increased by 13-46% compared with the traditional flat electrode. After the initial research has achieved encouraging results, the team next looks forward to improving the performance of dye-sensitized solar cells by improving the synthesis process and optimizing the geometry of the array of nanowires. Related papers were published in ("Nanotechnology" (Nanotechnology).
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