1. Department of Chemistry, National Tsing Hua University, Hsinchu 300044, Taiwan
2. Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
3. Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 20224, Taiwan
4. College of Semiconductor Research, National Tsing Hua University, Hsinchu 300044, Taiwan
5. Department of Chemistry, National Sun Yat-sen University, Kaohsiung 80424, Taiwan