Organic dye for highly efficient solid-state dye-sensitized solar cells

The feasibility of solid-state dye-sensitized solar cells as a low-cost alternative to amorphous silicon cells is demonstrated. Such a cell (see Figure) with a record efficiency of over 4 % under simulated sunlight is reported, made possible by using a new organic metal-free indoline dye (see Figure) as the sensitizer with high absorption coefficient.