1. Department of Electro-Optical Engineering, National Formosa University, Yunlin 632, Taiwan
2. Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
3. Department of Electrophysics, National Chiayi University, Chiayi 600, Taiwan
4. Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, Taiwan
5. Centre for Advanced Material and Energy Sciences, Universiti Brunei Darussalam, Brunei Darussalam