Single-terminal Injection Electroluminescence Mechanism for Micro-LED Driving and Detection

Abstract：Micro light-emitting diode(Micro-LED)，with many advantages such as high-resolution， high color gamut，and high stability，has broad prospects for near-eye display.However，two major technical issues in Micro-LED need to be solved，including mass electroluminescence detection and mass metal bonding.In this work，a working mode for Micro-LED with single-terminal carrier-injection is proposed，and a single-injection type Micro-LED related to the working mode is fabricated.The working process is studied by experiments and simulations in order to explore the working mechanisms.The current-voltage，current-frequency，brightness-frequency relationship and the periodic variation of the energy band of single-injection type Micro-LED under sinusoidal alternating current are studied.Moreover，the carrier transport model of single-injection Micro-LED is proposed.Finally，the application of single-injection mode used in the detection of vertical structure Micro-LED is demonstrated，which provides new ideas for Micro-LED detection.