An innovative way of manufacturing
solar cells that can convert light into electricity
with an energy conversion efficiency of more than 20%,
has been developed by Mitsubishi. It is believed to
be the highest ever conversion ratio achieved by a domestic
product. The Tokyo-based company achieved this by using
a newly developed anti-reflection layer that keeps light
trapped inside the solar cell. Composed of nitride,
the layer is only 0.08 micron thick but has twice the
refractive index of the normal atmosphere. When the
light transmitted through this layer reflects off the
solar cell electrodes, it bounces back down from this
layer and remains trapped. Mitsubishi increased the
total electrode surface area was by placing the electrodes
closer together. The combined effect has raised the
electricity-generating capacity per unit area of the
solar cell and boosted its energy efficiency above 20%.
The company already holds the fourth-largest share of
the domestic market for solar cells. Most of the commercially
available solar cells have an efficiency of around 15%.
With its higher efficiency, and better economic performance,
the new solar cells should be more attractive to the
consumers. Mitsubishi thus intends to double its production
of solar cells and try to overtake Sanyo.
Main Application:Energy
Contact for more information:
Science & Technology Wing Embassy of India
2-2-11, Kudan Minami, Chiyoda-ku
Tokyo 102-0074, Japan
Tel: +81-3-3262-2391 to 97,
Fax: +81-3-3234-4866
E-mail: tandonus@hotmail.com
