The light extraction efficiency of the QDCC‐based microLED displays is strong related to the aspect ratio (width/thickness) of the patterned QDCC pixels, because the very thin QDCC films and BM banks are required for the realization of high‐resolution microdisplays for AR and VR applications. We formulate high resolution QD photoresist, which can achieve color gamut higher than 85% BT. 2020 coverage at film feature resolution of 5 μm and the total thickness of QDCC and traditional CF less than 2.5 μm. The atomic layer deposition is also processed to protect the device, which results in prominent enhancement on the reliability performance.

Quantum dot (QD)-based RGB micro light-emitting diode (μ-LED) technology shows immense potential for achieving full-color displays. In this study, we propose a novel structural design that combines blue and quantum well (QW)-intermixing ultraviolet (UV)-hybrid μ-LEDs to achieve high color-conversion efficiency (CCE). For the first time, the impact of various combinations of QD and TiO2 concentrations, as well as thickness variations on photoluminescence efficiency (PLQY), has been systematically examined through simulation. High-efficiency color-conversion layer (CCL) have been successfully fabricated as a result of these simulations, leading to significant savings in time and material costs. By incorporating scattering particles of TiO2 in the CCL, we successfully scatter light and disperse QDs, effectively reducing self-aggregation and greatly improving illumination uniformity. Additionally, this design significantly enhances light absorption within the QD films. To enhance device reliability, we introduce a passivation protection layer using low-temperature atomic layer deposition (ALD) technology on the CCL surface. Moreover, we achieve impressive CCE values of 96.25% and 92.91% for the red and green CCLs, respectively, by integrating a modified distributed Bragg reflector (DBR) to suppress light leakage. Our hybrid structure design, in combination with an optical simulation system, not only facilitates rapid acquisition of optimal parameters for highly uniform and efficient color conversion in μ-LED displays but also expands the color gamut to achieve 128.2% in the National Television Standards Committee (NTSC) space and 95.8% in the Rec. 2020 standard. In essence, this research outlines a promising avenue towards the development of bespoke, high-performance μ-LED displays.

Thick‐shell quantum dots (QDs) with high mass absorption of 450 nm blue light (absorbance >1.5 for green QD and absorbance > 2.0 for red QD at concentration of 1 mg QD/1 mL solvent) have been adopted to formulate high resolution QD photoresist (QDPR), which can achieve color gamut higher than 90% BT.2020 coverage at film feature resolution of 5 µm and thickness less than 2 µm. The thermal stability and photostability of the QD color converter films were tested to evaluate for the feasibility of applications in color converters for full‐color µ‐LED microdisplays.