Different-sized semiconductor nanocrystals could help produce colorful light-emitting diodes

An international scientific research team reported in the American 'Science Advances' magazine that they invented a simple and economical new method that can manufacture semiconductor nanocrystals of different sizes on demand, which will help realize the industrialization of next-generation color light-emitting diodes on a large scale Production. Researchers at institutions such as the University of Munich in Germany have found that for semiconductors used in light-emitting diodes, changing the size of semiconductor crystals at the nanoscale allows them to emit light of different colors, ranging from blue to red visible light. High color purity.

nanocrystal

Researchers have developed a method to produce semiconductor crystals at the required size using the inexpensive perovskite material. Its core is a film mold with a thickness of only a few nanometers. It is composed of nanoporous materials containing silicon and alumina. There are a large number of micropores on it that can act as chemical reaction vessels. crystals.

Experiments have shown that the size of the micropores on the film mold directly affects the size of the nanocrystals, thereby determining the color of the light. The nanocrystals produced in this way are very stable, enabling light-emitting diodes to achieve high color fidelity.

The researchers say they will further improve the method's production efficiency and expand its range of applications, such as the production of flexible color displays.