Recent Advances in Transfer Printing of Colloidal Quantum Dots for High-Resolution Full Color Displays

Quantum dots (QDs) have garnered significant attention in the advanced optoelectronic devices due to their unique luminescent properties, including size-tunable emission, high photoluminescence efficiency, exceptional chromatic purity, and superior photostability. To achieve based high-definition full-color displays, it is critical to develop a precise patterning process capable of accurately depositing red, green, and blue QD subpixels at desired locations with high resolution. Among various patterning techniques, transfer printing has emerged as a promising method for achieving high-definition pixels while preventing cross-contamination between different colored subpixels. This technique involves transferring QD patterns to a target substrate using an elastomeric stamp. This review provides a comprehensive overview of the latest research trends in three types of transfer printing processes: additive-transfer printing, subtractive-transfer printing, and intaglio-transfer printing. We examine the strengths and limitations of each technique and showcase key applications in QD light-emitting diodes that utilize transfer-printed QDs.