Owing to the anisotropic property and small output signals of the piezoelectric nanogenerators (NGs) and the influence of the measurement system and environment, identification of the true signal generated by the NG is critical. We have developed three criteria: Schottky behavior test, switching-polarity tests, and linear superposition of current and voltage tests. The 11 tests can effectively rule out the system artifacts, whose sign does not change with the switching measurement polarity, and random signals, which might change signs but cannot consistently add up or cancel out under designed connection configurations. This study establishes the standards for designing and scale up of integrated nanogenerators. © 2009 American Institute of Physics.
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This research was supported by DARPA (Army/AMCOM/REDSTONE AR, Grant No. W31P4Q-08-1-0009), BES DOE (Grant No. DE-FG02-07ER46394), Air Force Office (Grant No. FA9550-08-1-0446), KAUST Global Research Partnership, National Institute For Materials, Japan.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.