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(11)

EP 3 143 648 A1

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(43) Date of publication: 22.03.2017 Bulletin 2017/12 (21) Application number: 15792197.4 (22) Date of filing: 07.05.2015

(51) International Patent Classification (IPC):  H01L 33/62(2010.01) H01L 33/36(2010.01) (86) International application number: PCT/SG2015/050100 (87) International publication number: WO 2015/174924 (19.11.2015 Gazette 2015/46)

(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 Designated Validation States: MA (30) Priority: 14.05.2014 US 201461996662 P (71) Applicant: Nanyang Technological University Singapore 639798 (SG)	(72) Inventors: JU, Zhengang Singapore 639798 (SG) LIU, Wei Singapore 639798 (SG) ZHANG, Xueliang Singapore 639798 (SG) TAN, Swee Tiam Singapore 639798 (SG) JI, Yun Singapore 639798 (SG) ZHANG, Zi-hui Singapore 639798 (SG) DEMIR, Hilmi Volkan Singapore 639798 (SG) (74) Representative: Viering, Jentschura & Partner mbB Patent- und Rechtsanwälte  Am Brauhaus 8 01099 Dresden 01099 Dresden (DE)