At the end of 2021, LG Display announced its next-generation OLED technology, called OLED EX, which the company says can increase panel brightness by 30%, improve display accuracy, and allow finished products to have smaller bezels. These improvements are the result of two key changes. The first is the use of an element called deuterium in the chemical makeup of LG’s OLED panels, and the second is the addition of algorithmic image processing.
According to sources, the deuterium blue organic material provided by DuPont of the United States allows the company to increase the brightness of the panel. Due to the “heavy atom effect”, after introducing deuterium atoms into the blue light material, the spin-orbit coupling effect of the light-emitting molecules will be enhanced, which is conducive to the generation of phosphorescence and increases its quantum efficiency. In addition, after the introduction of deuterium atoms, due to the shorter bond length and greater bond energy of the carbon-deuterium bond, the energy of the light-emitting material will be reduced, so that the stability and life of the light-emitting device are significantly enhanced. Although deuterated OLED technology has been commercialized, its popularization still needs to solve the problem of high cost of deuterated materials. There are two main reasons: the first is that deuterated materials require additional synthesis steps, and the second is that the synthesis of deuterated materials The supply of raw material heavy water is small.
There are three types of OLED main light emitting materials: blue light emitting materials, red light emitting materials and green light emitting materials. Together, they determine the performance and service life of OLED self-luminescence. Among them, although blue luminescent materials can emit brighter light, their lifespan is shorter than that of red and green luminescent materials. Therefore, DuPont of the United States tried to replace hydrogen with deuterium to improve this problem. It is reported that deuterium gas can minimize the loss of the blue main light-emitting material, prolong its service life, and the brightness of the screen has also been greatly improved.
LG stated in a recent statement: Since the second quarter of 2022, LG Display has integrated its EX technology into its OLED product lines in Paju, South Korea and Guangzhou, China. technology. This means that whether it is LG’s own OLED TV or OLED TV produced by other manufacturers using LG OLED panels, as long as the panels produced by LG after the second quarter (2022) are used, all have OLED EX technology.
