A low-cost route toward a vivid display with striking colors and high efficiency

If you have ever compared the image quality of a laser display and a liquid-crystal display side by side, you might never forget the striking color images from the laser display, which has a color gamut >140% of the standard of the National Television Standards Committee of USA (NTSC). However, the laser display is expensive and bulky in size. Can we expect a vivid display product that is inexpensive, lightweight, flexible, portable, self-emitting, highly stable and highly efficient? Quantum dot light-emitting diodes (QLEDs) would be the best answer. In Nature, Jin and colleagues1 described how a high-performance QLED can be produced through a solution process. The team has fabricated a high-performance, solution-processed red LED that is superior or comparable to state-of-the-art vacuum-deposited organic red LEDs in terms of color purity, quantum efficiency and operational lifetime.