Solar Energy Harvesting Using Pyroelectric Effect Associated with Piezoelectric Buzzer

摘要

It is now well reported that the coatings of graphene/candle soot/black carbon can improve the performance of pyroelectric materials. Herein, the performance of candle soot-coated pyroelectric material (piezoelectric buzzer) under solar heating is reported. To compare the performance, coated/uncoated piezoelectric buzzers are exposed to solar light as well as IR lamp separately. Piezoelectric buzzer shows multiple times superior performance after coating of candle soot. The open-circuit voltage improves five times with a peak voltage of 3.31 V in solar light. The comparative enhancement in short-circuit pyroelectric current is four times with a peak current of 2.73 mu A. Also, the power and energy densities show multifold enhancement after coating.