Associate professor at a university developed a perovskite light-emitting diode

Recently, an associate professor at a university made progress in a new perovskite light-emitting diode (LED), and for the first time in the world, a perovskite light-emitting diode was prepared by a full solution method.

In recent years, the application of emerging metal halide perovskite materials in light-emitting devices has attracted widespread attention, but the poor working stability of this type of device has become a bottleneck for 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%.