(Original title: Breaking foreign monopoly, more n

(Original title: Breaking foreign monopoly, more natural color display)

(Reporter Nan Nixuan correspondent Tan Jie) The new quantum dot display technology allows electronic screen color more natural and true, but has been monopolized by foreign companies. Nanjing University students recently invented a new type of photovoltaic materials that can be used in quantum dot display technology, breaking the monopoly of foreign companies. The program won the grand prize at the 15th Challenge Cup National Extra-curricular Academic and Technological Competition announced last month.

At present, the display industry is in a period of change toward the third-generation HD flexible display. The new displays mainly include an OLED screen (organic display) and a QLED screen (quantum dot display). However, the current OLED screen and QLED screen are basically monopolized by South Korea's Samsung and LG. Even Apple's newly released iPhone8 series and iPhone X are subject to Samsung's supply of OLED screens.

Compared with the OLED screen, QLED screen display better, mainly used in computers, televisions and other large-screen display. Q QED Q refers to the Q-screen is a quantum dot (Quantum Dots), some naked eye can not see the very small nanoparticles, because of its excellent optoelectronic properties, LED display can be used as the light-emitting layer material.

At present, the most developed quantum dots are cadmium-based quantum dots. However, due to serious environmental pollution caused by cadmium, the EU has banned the use of cadmium-based quantum dots. In addition, there are problems such as complicated preparation techniques and the like.

"Our work is mainly focused on the problem of cadmium-based quantum dots, a new type of quantum dots, all-inorganic perovskite quantum dots, which not only has simple preparation process and is easy to be mass-produced industrially, but also shows the effect Even better. "QD team leader, South Polytechnic Qian Xuesen 2014 undergraduates Chen Jiawei Materials Chemical Engineering, said.Due to its excellent optoelectronic performance and high compatibility, quantum dot team's improved quantum dot materials have broad application prospects. They can be used not only in new display fields but also in special lighting fields such as medical lighting and plant lighting. "At present, the color gamut of liquid crystal display in the market is only 70% of the NTSC (National Television Standards Committee), the color will be distorted, and our display color gamut is much higher than the market mainstream liquid crystal display, display better "Said Chen Jiawei.

The world's largest display technology research and development company BOE, the world-renowned enterprises TCL are highly praised the team's work, and expressed a strong intention to cooperate.

According to reports, since last November the college began preparing for the Challenge Cup, Chen Jiawei and team members work together to overcome difficulties. In order to catch up, the team members completed the project manual of tens of thousands of words in a day, they also learned the skills of assembling the display screen, but the display screen that was made at the beginning was not good enough to meet the requirements of commercial use. They are constantly looking for solutions that will ultimately bring the display to an excellent level.