Light harvesting effect

The theory describing the light-harvesting effects suggests going beyond the dipole-dipole approximation of Forster theory [67, 68], Its development for modeling the natural systems of photosynthesis is beneficial for the design of fluorescence reporters. 

On account of their physical, photo-physical, or catalytic properties, metallodendrimers have become a widespread class of compounds. Combination of the characteristics of dendrimers with those of transition metals can, for example, produce light-harvesting effects (see Section 5.2) and energy-transfer gradients. 

Sato, H. Kawasaki, M. Kasatani, K. Higuchi, Y Azuma, T Nishiyama, Y. Light-harvesting effect in photoelectric conversion with dye multilayers on a semiconductor electrode. J. Phys. Chem 1988, 92, 754-759. 

A key issue is the improvement of solar light harvesting. New active materials with high optical absorption in the visible and good photostability are needed. Implementation of carrier multiplication through impact ionization in quantum dots arrays could mitigate the losses related to carrier thermalization. The alternative approach is the development of vertically stacked tandem systems of increasing band gap active materials, which effect H+ reduction and water oxidation on opposite sides. 

Keywords Excimers Intermolecular interactions Light-harvesting Red-edge effects Resonance energy transfer Superquenching Wavelength-shifting... 

Superenhancement due to light harvesting in FRET and plasmonic effects and superquenching due to homo-FRET with the participation of a quencher. 

There are thus multiple effects by which the properties of the nanocarbon-semiconductor hybrid material can be different from the simple physical mixture of the two components [1] The nanocarbon offers an effective way for an efficient dispersion of the semiconductor, thus preventing agglomeration, but also providing a hierarchical structure [15] for efficient light harvesting and eventually easy access from gas/liquid phase components (in photocatalytic reactions) or electrolyte (in DSSC). 

---