ABSTRACT
Stable electroluminescence from micro-pixelated light-emitting diode (µLED) occurs when electrons and holes are continuously injected from external electrodes. Different from the general recognition, in this work, µLED works in an operation mode, namely, non-electrical contact and non-carrier injection mode, and can be 'wirelessly' lit up without external charge injection, which is different from the general recognition. Inherent holes and electrons in µLEDs can provide sufficient carriers for radiative recombination under alternating-current electric field. A possible model related to the diffusion of majority carrier and the drift of minority carrier in µLED was proposed, which is further confirmed by the employment of a 'carrier pump'. Finally, the intrinsic characteristics of the device-in-capacitor, namely, self-protection against electrical breakdown, were discussed. This work demonstrates a new device configuration and an alternative operating mode for µLED and provides a research manner to obtain advanced µLED-based technology.
