1. Department of Physics, Department
of Electrical and Electronics Engineering, and UNAM − Institute
of Materials Science and Nanotechnology, Bilkent University, TR-06800, Ankara, Turkey
2. Luminous! Center of Excellence
for Semiconductor Lighting and Displays, School of Electrical and
Electronic Engineering, School of Mathematical and Physical Sciences, Nanyang Technological University, Nanyang Avenue, Singapore
639798, Singapore
3. Physical
Chemistry/Electrochemistry, TU Dresden,
Bergstrasse 66b, 01062 Dresden, Germany