Contents 1. Introduction
As we progress into the world of the Internet of Things (IoTs), the need for a smart and powerful display is rising. To address this demand, two different technologies can be the potential candidates for the next generation of displays. The first one is the semiconductor-based micro LED with different colors of RGB. The other one is the color converted scheme which uses a monochromatic color of micro LED arrays to pump luminescent materials and convert the high energy photons into the visible ones (like red and green). Developments of both methods are still underway and have their own issues to be solved. For example, in the RGB micro LED method, the reduction of device’s quantum efficiency for a smaller size has been observed [1], [2] and it requires careful study. On the other hand, to form a dense array of color conversion layer (CCL) with high efficiency is also a challenging task [3], [4] because the CCL material usually is not easy to pattern. In this study, we demonstrated our latest results on fine-patterning with pixel size of 5 μm and large area of CCL by a novel way to combine the semiconductor processes and colloidal quantum dot (CQD) deposition.
