Recent Progress on Blue Quantum Dot Light-Emitting Diodes from Materials to Device Engineering

Quantum dots (QDs) are gaining widespread attention for their applications as light-emitting diodes (LEDs) owing to their ease of solution processing and high color purity. Furthermore, current QD light-emitting diodes (QLEDs) exhibit high electroluminescence performance and lifetime comparable to those of organic LEDs. However, some challenges remain in the commercialization of QLEDs for next-generation displays. One key issue is that blue QLEDs exhibit lower efficiency and lifetimes compared to red and green QLEDs, which is attributed to a deep valence band and wide bandgap. In this study, we discuss recent developments that aim to enhance the efficiency of blue QLEDs and explore the challenges that must be addressed for their commercialization.