1. Department of Physics, and Material Science, Engineering, and Commercialization Program Texas State University, San Marcos, Texas 78666
2. National Renewable Energy Laboratory (NREL), Golden, Colorado 80401
3. Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 70101, Taiwan and Department of Physics, and Material Science, Engineering, and Commercialization Program Texas State University, San Marcos, Texas 78666