The hottest free radical OLED will promote the pro

2022-10-20
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Free radical OLEDs will promote the progress of next-generation display technology

it is reported that scientists have found that semiconductor molecules with unpaired electrons (known as "free radicals") can be used to manufacture very effective organic light emitting diodes (OLEDs), and their quantum mechanical "rotation" characteristics can be used to overcome the efficiency limitations of traditional non free radical materials

free radicals are often known for their extremely high chemical reactions and adverse effects on human health and the ozone layer. Now, through the discovery of scientists, free radical OLED may become the basis of the next generation of display and lighting technology

the team from Cambridge University and Jilin University described the "upward" and "downward" rotation characteristics of this free radical. This stable free radical is known as the "dual" electronic state in the highly competitive global market. When these free radical OLEDs are powered on, they lead to high brightness double excited states, which can emit dark red light with an efficiency of nearly 100%

for traditional compounds (i.e. non free radicals without unpaired electrons), quantum force spin requires charge injection to form 25% bright "singlet" and 75% dark "triplet" in the operation of OLED. Free radicals provide a good solution to the most basic rotation problem that has plagued researchers since the emergence of OLED in the 1980s

Dr Emile Evans, as the chief co-author of Professor Richard friend's team in Cavendish Laboratory, said: "on the surface, the free radicals in OLED should not play any practical role in the functional characteristics of the rotating shaft torque durability tester, which makes our discovery very surprising. The free basic body is abnormally luminous and runs in OLED with unusual physical properties." When separated in the main matrix and excited by laser, free radicals typically have a single efficiency close to luminescence. This highly luminous behavior is transformed into a high brightness LED, but there is another transformation: in the device, the current injects electrons into the unpaired electron energy level in the free radical, pulls electrons out of the low energy level, and adds another part of molecules to form a bright double excited state

in the future, this kind of efficient blue and green radical diodes may further promote the innovation of materials. At present, researchers are exploring the possibility of free radicals 1. Button box: it is more convenient to manipulate the clamping of high and low jaws outside lighting applications, and manufacture a variety of nano plastic filling materials, hoping that free radicals can inspire other branches in the field of organic electronics research

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