| 초록 |
Förster resonance energy transfer is crucial for an increased dye loading, photocurrent generation, and broad spectral absorption of dye-sensitized solar cells. This process consists of organic fluorescent materials, and an organic dye with quasi-solid electrolyte. The FM moiety has multiple roles of (i) acting as an extra-electron donor portion, providing more electron density on the organic dye; (ii); controlling molecular aggregation on the TiO2 surface (iii) retarding the back-electron transfer from TiO2 to the redox mediator by forming a compact insulating dye layer; and (iv) acting as an antenna, collecting photons and, through long-range energy transfer, redirecting the captured energy to the dye sensitizer. In this study, DSSCs containing different concentrations (0, 0.5, 1, 1.5 and 2 wt.%) of a FM as the energy donor are investigated using FRET. The power conversion efficiency of DSSCs containing FMs in a quasi-solid electrolyte increased by 40% over a pristine cell. |
