(19)

(11)

EP 2 891 186 A1

(12)

(43) Date of publication: 08.07.2015 Bulletin 2015/28 (21) Application number: 13756443.1 (22) Date of filing: 29.08.2013

(51) International Patent Classification (IPC):  H01L 31/042(2014.01) H01L 31/0392(2006.01) (86) International application number: PCT/EP2013/067902 (87) International publication number: WO 2014/033216 (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 (30) Priority: 29.08.2012 EP 12182210 (71) Applicant: Danmarks Tekniske Universitet 2800 Kgs. Lyngby (DK)	(72) Inventor: KREBS, Frederik C. DK-2800 Lyngby (DK) (74) Representative: Inspicos A/S  Kogle Allé 2 P.O. Box 45 2970 Hørsholm 2970 Hørsholm (DK)