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SUMMARY:The Opto-Electronic Physics Which Just Broke the Efficiency Record
  in Solar Cells - Professor Eli Yablonovitch of UC Berkeley\,
DTSTART:20130513T150000Z
DTEND:20130513T160000Z
UID:TALK44937@talks.cam.ac.uk
CONTACT:Leona Hope-Coles
DESCRIPTION:	There are new physical ideas emerging in solar cells.  Improv
 ements in Open Circuit Voltage\, have now led to new records.  At these hi
 gh performance levels\, the electron-hole transport is adequate.  The crit
 ical issue becomes -- management of the photons inside the solar cell. \n	
 Counter-intuitively\, efficient external fluorescence is a necessity for a
 pproaching the ultimate performance limits.  This has led to the mantra:  
 “A great Solar Cell also needs to be a great Light Emitting Diode”.  \
 n	Alta Devices Inc.\, has reached 28.8% in a thin-film flat plate cell.  T
 he single-crystal thin film technology that achieved these high efficienci
 es\, is created by epitaxial liftoff\, and can be produced at cost well be
 low the other thin film solar technologies.
LOCATION:Pippard Lecture Theatre\, Cavendish Laboratory\, Department of Ph
 ysics
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