Ultra-high-definition screen breakthrough promising scientists successfully produce ultra-pure green light

Science and Technology Development Scientists at the Chemical Engineering Laboratory of the Federal Institute of Technology in Zurich recently invented an ultra-thin, flexible, light-emitting diode (LED) that emits ultra-pure green light. The researchers used this fine tone to display three letters. "ETH". Research team leader Professor Chih-Jen Shih for his breakthrough very satisfied: "So far, no one can successfully produce pure green like ours."

Professor Shih pointed out that this research will help the next generation of ultra-high resolution displays for TVs and smartphones. Electronic device screens must be able to produce ultra-pure red, blue, and green lights so that the monitor can produce clearer, richer details and finer color range-adjusted images. Previous technical research has been able to achieve the purity of red and blue light production, but solid-color green light seems to encounter a technical bottleneck, it is difficult to achieve technical breakthroughs, mainly due to visual constraints. Compared with red and blue light, it is difficult for the naked eye to discern the change of green hue, which makes ultra-pure green very complicated in technical production.

Prof. Shih also pointed out that they have developed an ultra-thin, flexible LED that can be used simply to emit pure green light at room temperature. He said: "Since our LED technology process does not require high temperatures, this opens up opportunities for the simple, low-cost industrial production of ultra pure green LEDs in the future." The research team used perovskite as a semiconductor crystal for LED radiation. The thickness of the perovskite material in the LED is less than 4.8 nm. The LED material may be made flexible like paper, it can be realized subjected to rapid production volumes to-roll process not only improves the productivity, while reducing production costs.

However, this ultra-pure green LED still needs some time before it is put into industrial applications. Shih's next step is to increase the efficiency of the LED. The efficiency of the LED's power conversion to light is only 3%. The TV screen's electro-optical conversion efficiency is 5% to 10%. He hopes to increase the efficiency of pure green LEDs to 6% to 7%. In addition, LED's illuminate the life of currently about two hours, compared to the market this big screen gap, and these are Shih teams need for this invention for improvement.

Original title: Ultra-high-definition screen breaks promise for scientists to successfully produce ultra-pure green light for the first time