1. LUMINOUS! Centre of Excellence for Semiconductor
Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798
2. School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
3. Department of Electrical and Electronics
Engineering, Department of Physics, and UNAM−Institute of Materials
Science and Nanotechnology, Bilkent University, TR 06800, Ankara, Turkey