 One of the feasible applications of the pyroelectric nanogenerator is used as an active sensor, which can work without a battery.One example has been introduced by Professor Zhong Lin Wang's group in 2012 by using a pyroelectric nanogenerator as the self-powered temperature sensor for detecting a change in temperature, where the response time and reset time of the sensor are about 0.9 and 3 s, respectively.In general, the pyroelectric nanogenerator gives a high output voltage, but the output current is small.