1. Energy Materials & Surface Science Laboratory, Solar Energy Research Center, School of Chemical Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea
2. New & Renewable Energy Material Development Center (NewREC), Chonbuk National University, Jeonbuk, 561-756, Republic of Korea
3. Group
for Molecular Engineering of Functional Materials (GMF), Institute
of Chemical Science and Engineering, Faculty of Basic Science, Ecole Polytechnique Federale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland