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(11)

EP 2 890 891 A1

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(43) Date of publication: 08.07.2015 Bulletin 2015/28 (21) Application number: 12756365.8 (22) Date of filing: 30.08.2012

(51) International Patent Classification (IPC):  F03G 7/06(2006.01) H01L 37/02(2006.01) H02N 1/08(2006.01) (86) International application number: PCT/EP2012/003645 (87) International publication number: WO 2014/032684 (06.03.2014 Gazette 2014/10)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME (71) Applicant: Albert-Ludwigs-Universität Freiburg 79085 Freiburg (DE)	(72) Inventors: KARANILAM THUNDIPARAMBU RAVINDRAN, Shankar 791 10 Freiburg (DE) WOIAS, Peter 79102 Freiburg (DE) NILKUND, Prashant 79102 Freiburg (DE) KRÖNER, Michael 79395 Neuenburg (DE) (74) Representative: Grünecker Patent- und Rechtsanwälte PartG mbB  Leopoldstraße 4 80802 München 80802 München (DE)