Solar cell efficiency case [4]

          In September 2018, researchers at the University of California, Los Angeles and other researchers developed a new type of thin-film solar cell. The two-layer design significantly increased the photoelectric conversion efficiency to 22.4%, setting a new record similar to solar cells. The National Renewable Energy Laboratory of the US Department of Energy confirmed this.  

          In September 2018, researchers at the University of California, Los Angeles and other researchers developed a new type of thin-film solar cell. The two-layer design significantly increased the photoelectric conversion efficiency to 22.4%, setting a new record similar to solar cells. The National Renewable Energy Laboratory of the US Department of Energy confirmed this.

 
          The upper layer of the double-layer tandem solar cell is sprayed with 1 micron thick perovskite to effectively capture solar energy, and the lower layer is sprayed with about 1 micron thick copper indium gallium selenium thin film battery. The surface of the thin film battery is treated at the nanometer level to add a polymerized organic hole transport layer. This design allows the battery to produce a higher voltage, thereby increasing the output power. The entire assembly is mounted on a glass substrate about 2 mm thick.
          This technology has improved the performance of CIGS solar cells by approximately 20%. This also means reducing energy costs by 20%. The next goal of the research team is to increase the photoelectric conversion efficiency of the battery to 30%.
          The structure of this two-layer thin-film solar cell is similar to that of a perovskite-type silicon cell, and people look forward to the possibility of future development. This design is very important for the future development of perovskite and thin film batteries. However, the design of the two thin-film batteries and the two-layer design are very complicated and may be potential problems in future commercial applications.

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