Recent advances of eco-friendly quantum dots light-emitting diodes for display

The outstanding properties of wide and flexibly tunable emission range, high color saturation, and cost-effectiveness make quantum dots (QDs) promising candidates in display field. However, the vast majority of QDs used in high-performance display devices contain toxic elements such as cadmium (Cd) or lead (Pb). In recent years, with increasing attention to physical health and ecological environment, the application of eco-friendly QDs in light-emitting diodes (LEDs) has been vigorously explored through tremendous efforts in material engineering and device architecture. The external quantum efficiency (EQE) of red InP-based and blue ZnSe-based quantum dot light-emitting diode (QLED) has exceeded 21.4% and 20.2%, which owns good stability and high color purity. In this review, the recent research progress of three major projects implemented on four types of eco-friendly QDs, including existing challenges and possible solutions, and their feedback on device performance are summarized, aiming to provide guidance for the further development of eco-friendly QLEDs.

Automated summary

Quantum dots (QDs) have outstanding properties of wide and flexibly tunable emission range, high color saturation, and cost-effectiveness, making them promising candidates in the display field. However, most QDs used in high-performance display devices contain toxic elements such as cadmium (Cd) or lead (Pb). In recent years, the application of eco-friendly QDs in light-emitting diodes (LEDs) has been vigorously explored, with efforts in material engineering and device architecture. The review summarizes the recent research progress of three major projects implemented on four types of eco-friendly QDs, including existing challenges, possible solutions, and their feedback on device performance, aiming to provide guidance for the further development of eco-friendly QLEDs.