Fig. 12
From: High-performance printed electronics based on inorganic semiconducting nano to chip scale structures
Energy generators fabricated using printed inorganic elements: (a–c) ZnO NW based piezoelectric nanogenerator (PENG) [184]. a SEM image of ZnO NW arrays bonded by Au electrodes. Inset: demonstration of an as-fabricated PENG. The arrowhead indicates the effective working area. b Open circuit voltage and (c) Short circuit current measurement of the PENG. d–f NG device made of PZT ribbons formed on a substrate of MgO and then TP onto a sheet of PDMS. e d31 as a function of poling time at a poling field of ∼ 100 kV/cm. f Deflection amplitude vs. modulating AC bias voltage amplitude for PZT ribbons printed on c-PDMS. g–h Thermoelectric generator (TEG) using Si microwires [82]: g scheme of a thermocouple cell, and concept of a TEG module. h Graph of open circuit voltage at different temperature gradients