1. Department of Chemistry National Taiwan University Taipei 10617 Taiwan
2. Graduate Institute of Electronics Engineering National Taiwan University Taipei 10617 Taiwan
3. Graduate Institute of Optics and Photonics National Taiwan University Taipei 10617 Taiwan
4. Department of Chemistry Hubei Key Laboratory on Organic and Polymeric Optoelectronic Materials Wuhan University Wuhan 430072 China
5. Department of Electrical Engineering National Taiwan University Taipei 10617 Taiwan
6. Institute of Atomic and Molecular Science Academia Sinica Taipei 10617 Taiwan