A High-Performance Tunable LED-Compatible Current Regulator Using an Integrated Voltage Nanosensor

A class of novel tunable light-emission-diode (LED)-compatible current regulator, including the reverse blocking and the reverse conducting device, is proposed by integrating the p-GaN cap with a voltage nanosensor on the AlGaN/GaN platform. Verified by the experimentally calibrated simulation, it is the feedback of the voltage sensor that stabilizes the depletion region of the reverse biased p-GaN /AlGaN/2-DEG junction, which contributes to clamping the voltage effectively. Compared with the proposed regulator, the devices only with the p-GaN cap or the sensor cannot perform the current regulation. Moreover, investigated by varying the p-type concentration of the p-GaN, the length of the sensor as well as the temperature, the proposed device featuring a ripple wave below 4 mA/mm and a temperature coefficient of 4.5 mA \cdot mm ^{-\textsf {1}}\text{K}^{-\textsf {1}} exhibits its potential in LED industry and other related applications.