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(11)

EP 2 183 790 A2

(12)

(88) Date of publication A3: 25.02.2010 (43) Date of publication: 12.05.2010 Bulletin 2010/19 (21) Application number: 08795328.7 (22) Date of filing: 14.08.2008

(51) International Patent Classification (IPC):  H01L 31/04(2006.01) (86) International application number: PCT/US2008/009732 (87) International publication number: WO 2009/032052 (12.03.2009 Gazette 2009/11)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 29.08.2007 US 966792 P (71) Applicant: University Of Delaware Newark, DE 19716 (US)	(72) Inventors: BARNETT, Allen M. Landenberg Pennsylvania 19350 (US) HONSBERG, Christiana Beatrice Landenberg Pennsylvania 19350 (US) BOWDEN, Stuart Graham Landenberg Pennsylvania 19350 (US) (74) Representative: HOFFMANN EITLE  Patent- und Rechtsanwälte Arabellastrasse 4 81925 München 81925 München (DE)