Solar cells - I think they can, I think they can

Solar cells: UQAM researcher solves two 20-year-old problems
Thanks to two technologies developed by Professor Benoit Marsan and his team at the Universite du Quebec a Montreal (UQAM) Chemistry Department, the scientific and commercial future of solar cells could be totally transformed. Professor Marsan has come up with solutions for two problems that, for the last twenty years, have been hampering the development of efficient and affordable solar cells.

http://www.er.uqam.ca/nobel/dep_chim/rindex.php?dossierprof=prof&pagehtm=marsan.htm

Solar Cell Efficiency...Almost There

• IBM Researchers have developed a new type of solar cell which more efficiently converts sunlight into electricity (9.6% vs 6.7%).
• Semiconductor made of the elements copper, zinc, tin, and sulfur (abundant & cheap) as well as selenium (rare yet relatively cheap).
• Pros:
• Uses cheaper materials than other "thin film" solar cells.
• Ink-based manufacturing process solves many quality issues previously encountered with solar cells.
• Cons:
• The ultimate hurdle preventing mass-production of efficient solar cells is high cost and inadequate supply of the rare semiconductor components (e.g. selenium, indium, gallium).
• Future Research:
• If most/all of these elements could be replaced with a more common element such as sulfur without dampening semiconductor efficiency, the commercial success of solar cell technology would be soon-to-come.

http://www.technologyreview.com/energy/24521/?nlid=2741