Embedded zinc oxide optical spacer small molecule organic solar cells increase efficiency by 50%
According to a recent report by the Physicist Organization Network, researchers at the University of California, Santa Barbara, have demonstrated that the thickness of the active layer is tuned by embedding an optical gap only between the active layer and the electrode of a small-molecule organic solar cell. This will increase its efficiency by 50% from 6.02% to 8.94%. At present, organic solar cells and polymer-based solar cells in the world are the top research directions in the industry, but other organic materials, such as small molecules, have also proved promising. Although small-molecule organic solar cells are now less efficient than polymeric solar cells, they are generally easier to manufacture and easier to increase efficiency. The researchers explained in the paper that small-molecule organic solar cells have several advantages over organic polymer solar cells: relatively simple synthesis, high charge carrier mobility, and the same size of particles (monodisperse) And better reproducibility and so on. However, small-molecule solar cells have achieved the highest efficiency of about 8% so far, somewhat behind the best polymer devices. The research team led by Professor Alan tuned the thickness of an active layer of a small-molecule solar cell in some simple demonstrations. A zinc oxide optical spacer was embedded between the active layer and the metal electrode to capture more light and improve Absorption of light. The optical spacer inserted into the active layer is a more favorable position in the optical electric field within the cell.
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