1. Organic Nano-Piezoelectric Device Laboratory (ONPDL), Department of Physics, Jadavpur University, Kolkata 700032, India
2. Brandenburg University of Technology Cottbus-Senftenberg, Applied Physics and Sensor Technology, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany
3. Department of Mechanical Engineering, University of Bath, Bath BA27AY, U.K.
4. Brandenburg University of Technology Cottbus-Senftenberg, Applied Physics and Semiconductor Spectroscopy, K.-Zuse-Str. 1, 03046 Cottbus, Germany
5. Institute of Nano Science and Technology, Phase-10, Sector-64, Mohali 160062, India