Ⅱ. Interdigitated electrode with piezoelectric generator 18 2.1. Ferroelectric P(VDF-TrFE) copolymer 2.2. Experiment details 20 2.2.1. Development of interdigitated electrodes 2.2.2. Fabrication of piezoelectric generators 2.2.2.1. Fabricate interdigitated electrodes 2.2.2.2. Formation of P(VDF-TrFE) filMaster 2.2.3. Bending test measurements and characterization 2.3. Results and discussion 27 2.3.1. Output performance of the piezoelectric generator 2.3.2. Optimization of the piezoelectric generator 2.3.2.1. Gap between adjacent electrodes 2.3.2.2. Electrode design 2.3.2.3. Film thickness 2.3.3. Working principle and strain calculation 2.4. Conclusion 41
Ⅲ. Ultrathin multi-deformable piezoelectric generator 42 3.1. Ultrathin piezoelectric generator 3.1.1. Stretchable wavy-ribbons 3.1.2. Conformable energy harvester 3.2. Experimental details 47 3.2.1. Ultrathin PI film substrate 3.2.2. Compression and stretching 3.2.3. Device characterization 3.3. Results and discussion 50 3.3.1. Output performance of the multi-deformable generator 3.3.2. Wavy-ribbon multi-deformation formation 3.3.3. Required energy for deformation 3.4. Conclusion 60
