19 / 28
Page 50
allied
academies
Journal of Materials Science and Nanotechnology | Volume: 2
August 20-21, 2018 | Paris, France
Materials Science and Materials Chemistry
International Conference on
Novel hererojunction nanostructrures for high efficient solar photo-electrochemical water splitting
Madhavi V, GMohan Rao
Indian Institute of Science, India
T
he semiconductor-based generation of hydrogen via
water splitting using solar irradiation has attracted great
attention since the first report of photoelectrochemical (PEC)
water splitting was published by Honda and Fujishima in
1972. To achieve the best efficiency of solar water splitting,
the PEC cell must perform multiple functions like light-
harvesting, semiconductor/electrolyte interfaces, charge
transfer, and chemical redox reactions. The earth-abundant
materials that can be used in solar water splitting cells
remain an important goal for environmentally challenging
methods for energy conversion and storage. Recently many
researchers have put potential efforts to develop efficient
photoelectrodes, depending on the shape and size of micro
and nanoscale features of semiconductors. There are several
numbers of traditionally available single semiconducting
photoanodes, dichalchogen heterojunction photoanodes,
compound semiconductor and heterojunction photoanodes
for construction of PEC cell. Among all these photoanodes
the
nanostructured
heterojunction
photoanodes
exhibits better efficiency. The development of particular
nanostructured heterojunction photoanodes material which
absorbs visible light efficiently, durability and scalability
is a challenging task. The heterojunction nanostructures
provide an internal electric field which facilitates the
separation of the electron-hole pairs and induces faster
migration of charged carriers to enhance the efficiency
of the photoelectrochemical cell. In addition to that we
have to reduce photo-corrosion, good chemical stability in
acidic aqueous solutions (pH < 4) under solar illumination
and finally we will get efficient hydrogen generation.
e:
madhuvphysics@gmail.com