1. VIT University Chennai, Division of Physics, School of Advanced Sciences, Vandalur—Kelambakkam Road, Chennai 600 127, India
2. McGill University, Department of Electrical and Computer Engineering, 3480 University Street, Montreal, Quebec H3A 0E9, Canada
3. Chonbuk National University, Department of Organic Materials and Fiber Engineering, 567 Baekje-daero, Deokjin-gu, Jeollabuk-do, Jeonju 561 756, Republic of Korea
4. Chonbuk National University, School of Advanced Materials Engineering, Semiconductor Materials Process Laboratory, 567 Baekje-daero, Deokjin-gu, Jeollabuk-do, Jeonju 561-756, Republic of Korea