Molecular Layer Electrodeposition of Semiconductors
Compound semiconductor films are commonly synthesized by
molecular beam epitaxy, chemical vapor deposition, or vapor phase
epitaxy in the fabrication of optoelectronic devices. To date, stringent
material quality requirements have excluded electrodeposition
for synthesis of semiconductor compounds for this application.
In a recent report, Shalini Menezes of InterPhases Research in
California described a novel electrochemical deposition scheme for
preparing molecular layer structures of semiconductor materials.
The successive electrodeposition of monolayers of the compound
was performed from a single electrolyte containing all of the constituent
elements. Menezes showed that controlling the kinetics of
the competing reactions by careful regulation of temperature, electrolyte
composition, deposition potential, solution volume, and
anodic dissolution potential is critical to producing a film of the
desired stoichiometry. The author demonstrated the versatility and
unique features of this method, known as molecular layer electrodeposition
(MLE), by growing CuInSe2 films that are commercially
important in solar cell applications.
In other words "electrochemical deposition!!"
Link about semiconductor making...
http://www.tpub.com/neets/book7/24f.htm
Doping materials
http://inventors.about.com/library/inventors/blsolar5.htm
Using organic Semiconductors and Conductors
http://www.tda.com/eMatls/ntype.htm
VERY COOL! I never really thought about it but, lets just say that you start with a peice of metal, place it into a chemical bath of some dilluited chemical that produces a postive layer like a solution containg "boron" and a negitive solution "phosphorous" in two different beakers, apply charge to the plate and more or less produce a cell after dipping and creating the electrochemical deposition that is required. It would be cheap and fast to produce, even if it had impuritys and was less then say 7% efficient or so...
What do you think? |
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