New LED makes it possible for a new generation of lighting systems

According to Lei Feng reports, quantum dots have experienced an important moment. Last month, Samsung's first quantum TV official shipments, production is gradually increasing, which means that 15 years ago, the promise seems to have been achieved.

At present, researchers at Hiroshima University in Japan have used silicon based quantum dots for the development of a new type of light-emitting diode, and promised that this will be a new revolution in the history of lighting systems. These researchers have created a kind of inorganic / organic light-emitting diode, which can emit blue and white light through quantum dots. This blue and white light-emitting diode will allow us to develop a new generation of free lighting and display lighting system.

In "Applied Physics" (Applied Physics Letters) a research report published, researchers said that this kind of quantum dots and their voltage led only 6 volts can be light, light and effective amount of 78% from silicon quantum dots.

In order to let you know how to make these numbers is calculated, about 6 years ago, for the most advanced optical efficiency of quantum dot light-emitting diodes by more than 90% reduced to about 15%, because these dots must be loaded into a conductive organic thin film, to.

These Japanese researchers also said that their input and output power density generated by the LED were 280 and 350 times that of previously reported devices. The reason why the input and output power density of LED based on quantum dots is so high is that these hierarchical structures are optimized in a certain degree, which makes the carrier transfer better.

The physical size of the LED can provide an effective area of 4 mm2, which is a typical commercial LED of the times of 40. In addition, the thickness of this LED is only 0.5 mm.

Perhaps the most intriguing aspect of the investigation is that this new type of LED is produced by the solution process, which needs to be carried out at room temperature and room pressure.

This process requires the selection of a glass substrate, and then pour some conductive polymer solution on it and colloidal silicon quantum solution.

Saitow, a professor at Hiroshima University and lead researcher Ken-ichi, added: "quantum dot LED as the next generation of LED has attracted a lot of attention. Despite the success of its application still needs some breakthroughs, but the quantum dot hybrid LED achieved fruitful results will be far beyond our imagination. "