Highly efficient organic light-emitting diodes
Organic light-emitting diodes (OLEDs) are seen as a promising replacement for the liquid-crystal displays (LCDs) used in many flat-screen televisions because they are cheaper to mass-produce. Zhikuan Chen at the A*STAR Institute of Materials Research and Engineering and co-workers have now shown how meticulous engineering of fluorescent molecules can dramatically increase OLED efficiency.
Conventional light-emitting diodes are made of inorganic crystals such as gallium arsenide. OLEDS, on the other hand, utilize carbon-based materials that can be made flexible. Today, OLED technology is commonly used to make large-area outdoor displays and wearable displays. However, further improvements in operation efficiency are required if OLEDs are to become truly competitive against the alternative options.
Chen and his co-workers have now reported blue light-emitting devices that reach an external quantum efficiency (EQE) of as high as 9.4%almost double the classical upper limit of 5% for fluorescence-based OLEDs. This improvement is important because higher efficiency means a lower driving voltage and thus lower power consumption and increased device lifetime, explains Chen.
Lees verder: http://www.physorg.com/news/2011-08-highly...ing-diodes.html
Bron: PhysOrg
Laatste berichten
- 23:41 Dark Energy 12
- 23:36 objecten 1
- 16:07 massa 9
- 11:12 Het woord dat in alle talen bestaat 4
- 03 jun Verschil tussen 2 kansberekeningen 1
- 03 jun Ervaringen met "herontdekkingen" 41
- 02 jun EV laden met 8 vs 13 A 5
- 02 jun Casus uit de praktijk: positief test THC 62
- 31 mei staafje 7
- 31 mei Optellen/aftrekken van vectoren in 3D 4
- 31 mei Benodigd koppel berekenen 7
- 30 mei [wiskunde] is dit toegestaan 6
- 29 mei Zwaremetalenvergiftiging 4
- 29 mei Overdracht van DiBP ná vaatwasser 3
- 28 mei Optimalisatie. Hulp nodig 2
- 27 mei nulpunten 4
- 27 mei fourier afleiding 3
- 26 mei 2022 Tandarts Vraag 9 fysica 4
- 26 mei resonantiefrequentie massaveersysteem in vloeistof 56
- 25 mei Muziektopic 1853
Nieuwsberichten
- 04 mar Een nieuw soort magnetisme: altermagnetisme
- 31 okt AI kan via stem diabetes vaststellen 11
- 21 okt Einstein krijgt wéér gelijk 45
- 07 feb witter dan wit 20
- 19 jun irrigatie en de aardas
Highly efficient organic light-emitting diodes
Moderator: Astro
- Berichten: 10.179
Highly efficient organic light-emitting diodes
Zoek je graag naar het meest interessante wetenschapsnieuws? Wij zoeken nog een vrijwilliger voor ons nieuwspostteam.