Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 2, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3072362
Keywords
electric generators; II-VI semiconductors; piezoelectric devices; piezoelectric materials; Schottky barriers; switching; wide band gap semiconductors; zinc compounds; 1; f noise; nanoelectromechanical devices
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Funding
- DARPA [W31P4Q-08-1-0009]
- BES DOE [DE-FG02-07ER46394]
- Air Force Office [FA9550-08-1-0446]
- KAUST Global Research Partnership, National Institute For Materials, Japan
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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.
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