Zhengzhou University produces a new quantum dot light-emitting diode

In recent years, as Reuters, metal halide emerging applications perovskite material in the light emitting device caused considerable attention, but poor operational stability of this type of device has become a bottleneck to its application.

Researchers have successfully produced highly efficient and stable perovskite quantum dot LEDs based on low-cost, full-solution processes with potential for large-scale production. The device exhibits high-brightness green light emission with an external quantum efficiency of 3.79% and a maximum brightness of 6093.2 kandela per square meter. Its comprehensive performance is comparable to that of the commonly used vacuum deposition method for perovskite LEDs, while maintaining the uniqueness of the solution method. Advantage.

More importantly, the device exhibits excellent humidity and temperature stability. In a high-humidity environment with a relative humidity of 75%, the device can work continuously for more than 12 hours, still have a strong light output at a high temperature of 120 degrees Celsius, and after three consecutive heating and cooling cycles, the device emits light. Performance can be restored to 85%.

Editor: Yan Zhixiang