A kind of micro LED module and preparation method thereof

Abstract

The invention discloses a Micro LED module and a preparation method thereof. The substrate is a single crystal substrate, and the Micro LED epitaxial thereon has a low dislocation density, lower influence on brightness, and higher luminous efficiency, so that Micro LED can still emit uniform light with sufficient brightness in the small current range; the quantum well light-emitting layer is n-type doped, and the perovskite quantum dot is a semiconductor material, which can effectively realize hole injection through the perovskite, so that the quantum well light-emitting layer Light up and excite the perovskite quantum dots on it to make it emit light of other colors, complete color conversion, and realize full-color Micro LED modules; perovskite quantum dots have better temperature stability, which can ensure the color of the display module Stability; moreover, the quantum dots are arranged on the quantum well light-emitting layer, and are located under the hole injection layer and the glass cover plate, which has better waterproof and oxygen-proof effects.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a Micro LED module and a preparation method thereof. Background technique [0002] In the application of LED chips, the application of ordinary LED chips is mainly in lighting and display backlight modules, and the current rapid development of Mini LED is mainly applied in indoor and outdoor display screens. But in many applications that require higher size and pixel density, the existing technology cannot meet the requirements. Therefore, Micro LED technology emerged as a brand-new display technology. Its application concept is completely different from the previous two. It can be applied in wearable watches, mobile phones, car displays, VR / AR, TVs and other fields. The ultimate display technology. [0003] Micro LED has advantages in brightness, contrast, response speed, color gamut, lifespan, energy consumption, etc. From the perspective of technology iteration...

AI Technical Summary

Problems solved by technology

However, Micro LED technology still has the following problems: When Micro LED is used for display, it needs to work in a small current range, the main range is 0.02-2A / cm 2 , in this small current range, the dislocation density inside the epitaxial layer of the chip has a great influence on the brightness, which may easily lead to uneven brightness or even no brightness.

However, in the current quantum dot luminescence technology, such as CdSe, which contains the highly toxic element Cd, which has been banned in many countries, its luminescence characteristics also vary greatly with temperature, and there is a problem of color shift.

Images