Analysis of the working principle of dual color light-emitting diodes 1

Dual color light-emitting diode is a special type of light-emitting diode that can switch between emitting light in two different colors. Its working principle is basically similar to that of a regular DAC8802IPW light-emitting diode, which emits light by injecting an external voltage to generate charge carriers in the semiconductor material. The following is a brief analysis of the working principle of dual color light-emitting diodes:diode

1. Semiconductor structure: Dual color light-emitting diodes typically consist of two light-emitting regions (possibly LED chips of different colors) and a shared cathode (or anode). Each luminescent region contains different luminescent materials, corresponding to different luminescent colors.

2. PN junction: Bicolor light-emitting diodes also include a PN junction, which forms an internal electric field at the PN junction when a voltage is applied. When a certain degree of voltage is applied, an internal electric field is formed, causing electrons to flow from the N region to the P region, while holes flow from the P region to the N region, resulting in recombination near the PN junction and producing photons to emit light. Due to its unique structure, dual color light-emitting diodes can emit light of different colors by passing current through different light-emitting regions.diode