Since giving up the large screen OLED technology route, Samsung has been increasing the research and development of qled quantum dot technology, and most of its TV products also use qled technology. At present, the advantage of qled is that it can greatly improve the color gamut coverage of TV and display more colors. However, there is still a long way to go for the present qled to be the “complete body” of electroluminescence.
At present, the essence of qled TV on the market is still LCD TV, and the backlight is still led light source, but a layer of quantum dot film is added between the backlight and the liquid crystal to improve the color performance of the picture. The future of qled is electroluminescent quantum dots. Like OLED, the pixels emit light, and there is no life problem of OLED organic light-emitting materials, so it will not burn the screen.
Although far from the realization of electroluminescence technology, Samsung has never given up exploration. Recently, South Korean media reported that Samsung has successfully developed blue qled technology, which can improve the screen luminous efficiency by 20%, achieve the maximum brightness of 88900 nits, and extend the qled handle to 16000 hours.
The so-called quantum dots are nanometer sized semiconductor particles. When illuminated, photoluminescent quantum dots will emit different colors of light according to their size. Blue is the most difficult color among the three primary colors of qled. It has the largest band gap and will be oxidized when exposed, resulting in shorter service life and lower luminous efficiency.
Samsung said the researchers used a double emitting layer and short ligand structure on the surface of the blue quantum dots, and increased the current injection rate to ensure the sustained light response of the quantum dot material. This technological innovation is expected to accelerate the implementation of electroluminescent quantum dot technology as soon as possible.
Editor in charge ajx