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Piezoelectric generation is extended to the new domain of group-III nitrides. The output increases with increasing carrier density following the sequence: AlN, AlGaN, GaN and InN. The results indicate that, for a nanomaterial whose conductivity is below an optimum value, the output of its piezoelectric nanogenerator is dominated by the consumed voltage at the nanomaterial.
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Wang et al. (2010) studied this question.
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