1. Alan G. MacDiarmid Energy Research Institute, Chonnam National University, Gwangju 61186, South Korea
2. Department of Polymer Engineering, Chonnam National University, Gwangju 61186, South Korea
3. Institute of Research and Development, CNB Inc., Gwangju 61008, South Korea
4. Industry-University Cooperation Foundation, Chonnam National University, Gwangju 61186, South Korea
5. Department of Materials Science and Engineering, Hongik University, Seoul 121-791, South Korea
6. School of Polymer Science and Engineering, Chonnam National University, Gwangju 61186, South Korea