1. Department
of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, ROC
2. Compound
Semiconductor Solar Cell Department, Next Generation Solar Cell Division,
Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan, ROC
3. Department
of Photonics Engineering, Yuan-Ze University, Taoyuan 32003, Taiwan, ROC
4. School
of Material Science and Engineering, State Key Laboratory of Advanced
Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou City 730050, Gansu Province, P. R. China
5. Institute
of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
6. Department
of Physics, National Sun Yat-Sen University, Kaohsiung, 80424, Taiwan, ROC