Temperature Effects of Piezoresistance Coefficient

A higher sensitivity is achieved by making use of a high electron mobility transistor (HEMT) as the piezoresistive device. The temperature dependence on the electromechanical coupling effect of accelerometers is reported. The current in the structure of our study decreases at the rate of 3.15 mA/ºC with the temperature going up at every region, and piezoresistance coefficient decreases because of the shift of energy and expansion of lattice.