1. Center for Autonomous Solar Power (CASP), Binghamton University, NY 13902, USA
2. Department of Electrical and Computer Engineering, Binghamton University, Binghamton, NY 13902, USA
3. Department of Physics, Binghamton University, Binghamton, NY 13902, USA
4. Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ 07102, USA
5. Materials Science and Engineering Program, Binghamton University, Binghamton, NY 13902, USA