From Wikipedia, the free encyclopedia
Photoelectrochemical cells or PEC's are
solar cells and extract electrical energy from light,
visible light. Each cell consists of a semiconducting
photoanode and a metal
cathode immersed in an
Some photoelectrochemical cells simply produce electrical
energy, while others produce
hydrogen in a process similar to the
electrolysis of water.
In this type of photoelectrochemical cells,
electrolysis of water to
oxygen gas occurs when the
is irradiated with
electromagnetic radiation. This has been suggested as a way
solar energy into a transportable form, namely
hydrogen. The photogeneration cells passed the 10 percent
economic efficiency barrier.
Lab tests confirmed the
efficiency of the process. The main problem is the
corrosion of the
semiconductors which are in direct contact with water.
Research is going on to meet the
DOE requirement, a
service life of 10000 hours.
- For more details on this topic, see
Graetzel cells or dye-sensitized
solar cells; these cells use dye-adsorbed
highly porous nanocrystalline titanium oxide (nc-TiO2)
to produce electrical energy.
Other third generation solar cells
Nanocrystal solar cell
Polymer solar cell
Materials science |
Energy conversion |
Hydrogen production |
Fuel cells |