41‐5: Invited Paper: Quantum Dot Conversion Layers Through Inkjet Printing

Abstract

Quantum dot color conversion layers have the potential to greatly improve the efficiency and color performance of displays including and beyond liquid crystal displays. To fully realize these improvements, the quantum dots must be deposited and patterned at high resolution. One promising method for achieving this is through inkjet printing. In this paper we report on the fabrication and characterization of quantum dot inks, as well as films made from inkjet deposition of these materials.

4‐5: Quantum Dot Design Criteria for Color Conversion in MicroLED Displays

“…Numerous presentations and articles have proposed the use of quantum dots (QDs) as a downconverter material dispersed in thin organic films for applications in microLED displays and color filters [1][2][3] but without detail on the design requirements. In the case of microLEDs, this approach allows making a fullcolor RGB display from monochromatic blue GaN starting sources, thereby avoiding the challenges of massively parallel transfer from three separate types of LED wafers with three different performance characteristics.…”

Mini-LED, Micro-LED and OLED displays: present status and future perspectives

“…1b, each blue LED chip pumps a subpixel in the patterned CC layer (quantum dots or phosphors) 44 . An absorptive colour filter (CF) array is registered above to absorb unconverted blue light 44,45 and suppress ambient excitations. This filter also enhances the ACR so that no CP is required.…”

“…In Fig. 1b, the patterned CC film is normally a quantum dot colour filter (QDCF) 44 . The overall EQE becomes a product of the blue chip EQE (EQE chip,B ) and QDCF's CC efficiency (EQE QDCF ).…”

32‐1: Invited Paper: Review of Micro‐light‐emitting‐diode Technology for Micro‐display Applications

“…Recently, Nanosys realized stripe patterns with 2 μm width and 12 μm length through a conventional lithography [ 33 ]. Nanosys and DIC Corporation jointly demonstrated the possibility of the inkjet-printed QD as the color conversion layer on μLED arrays even though the presented subpixel size was 280 μm x 80 μm [34]. Prof. Norris group in ETH Zurich demonstrated QD patterns with down to 100 nm in diameter by electro-hydrodynamic jetting [ 35 ].…”