Quantum Dot Color Conversion Characteristics and Performance Improvement Based on Micro-LED
Pengsen Lin, Xiaoxiao Ji, Xinyi Wang, Luqiao Yin, Jianhua Zhang
Abstract
Micro-light-emitting diodes (Micro-LEDs) have the advantages of excellent optical performance, low power consumption, and high efficiency and are widely used in displays, high-bandwidth visible light communication, optogenetics, and other fields; according to the law of refraction (Snell’s law), the difference in the reflectivity of different light-scattering particles will result in a different amount of light passing through the black matrix (BM), which will affect the optical crosstalk. Therefore, this article explored the different reflectivity (0%–50%) of doped scattering particles and used the optical simulation software Tracepro to simulate and evaluate the light extraction efficiency and optical crosstalk. The simulation results showed that increasing the reflectivity of the doped scattering particles increased the optical efficiency, while increasing the reflectivity caused the optical crosstalk to decrease first and then increase. Established a <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$5\times5$ </tex-math></inline-formula> quantum dot (QD) monomer array model and compared the luminous effects of the two array models with and without a light-blocking matrix. The picture with the light-blocking matrix has no obvious crosstalk, and the edges of the outgoing light field were clear. According to the results of the illuminance map and the true-color map. For small-sized devices below <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$10 \mu \text{m}$ </tex-math></inline-formula> , a comparative simulation experiment was designed in this article. Small-sized devices had lower light efficiency and were more affected by optical crosstalk. At the same time, this article added the photoresist mixed with Ag nanoparticles experiment, and the experimental results were consistent with the simulation results, verifying the accuracy of the simulation results.