According to foreign media OLED-INFO news, the Cambridge Isotope Laboratory in the United States has found that deuterium, an isotope, can significantly extend the life of OLED panels, making them less susceptible to aging and improving the luminous efficiency.
In recent years, OLED panels with its high brightness, ultra-thin, wide color gamut, flexible and other characteristics are rapidly replacing LCD panels, which are adopted by more and more smart phones. According to Counterpoint statistics, the use of OLED panels in smartphones worldwide has reached 49%.
However, the application of OLED panels to large-size TVS will expose some shortcomings. First of all, the brightness of this panel is difficult to do very high; Secondly, because the life of different red/green/blue light sources is different, the screen display fixed screen time is too long, there will be a problem of burning the screen.
According to the research institute, the use of deuterium isotopes to replace the hydrogen in the compound as a light-emitting material can significantly extend the service life of OLED panels, while achieving higher brightness. This is due to the fact that the chemical bonds between deuterium-carbon are stronger than hydrogen-carbon bonds, resulting in more stable compounds, a phenomenon known as the "kinetic isotope effect" (KIE). Recently, research institutions have tried to apply deuterium to the development of OLED, mainly for OLED light sources that emit blue light. Because blue light is more frequent and more powerful, it used to fade faster. The use of deuterium instead of hydrogen can extend the life of blue light components by 5-20 times, and the luminous efficiency will also be improved.
The researchers found that replacing hydrogen with deuterium in the sintering phase of OLED production can significantly reduce the "thermoelectron degradation effect" of metal oxide semiconductor transistors. In other semiconductor processing and manufacturing processes, the use of deuterium can also increase the life of transistors by 10-50 times.
In natural water, there is only one atom of deuterium for every 6,400 hydrogen atoms, so this isotope is scarce. However, there are currently some heavy water (D2O) production facilities in the United States that can concentrate and enrich heavy water to extract deuterium. Cambridge Isotope Separation Corporation (CIS), a wholly owned subsidiary of Cambridge Isotope Laboratory (CIL), Ohio, USA, owns the world's largest commercial D2O enrichment facility.
Specifically, "deuterobromobenzene" is used for OLED material preparation, which can achieve the effect of extending the luminous life. In addition, deuterium applied to other semiconductor and electronic fields can also play a similar effect.
