Improving zinc oxide nanorods’ performance in piezoelectric nanogenerators
Scientists in the Republic of Korea have treated zinc oxide nanorods in piezoelectric nanogenerators (which use mechanical vibrations, such as body movement and air flow, to power electronic devices) to a thermal annealing process to improve their output voltage (output was 25 times higher than nanorods that had not been treated), even under ultraviolet light. When zinc oxide is exposed to ultraviolet light (including sunlight), photo-excited free electrons are generated that hinder its performance.
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