US study found that small molecule organic solar cells can increase efficiency by 50%

Researchers at the University of California, Santa Barbara, have demonstrated that the efficiency of small molecule organic solar cells can be achieved by tuning the thickness of the active layer and embedding an optical gap between the active layer and the electrodes of a small molecule organic solar cell. The 50% increase from 6.02% to 8.94%.

The research team led by Professor Alan tuned the thickness of the 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 so that more light could be captured and increased. Absorption of light. The optical spacer inserted into the active layer is a more favorable position in the optical electric field within the cell.

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.

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