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The performance of organic light-emitting diodes (OLED), based on NPB/Alq 3 /KCl/Alq 3 active regions, with various anode (i.e. ITO and ITO/MoO 3 ) and cathode (i.e. Al and LiF/Al) structures is compared. NPB, Alq 3 , KCl, ITO, MoO 3 , Al and LiF are N,N′-bis-(1-naphthl)-diphenyl-1,1′-biphenyl-4,4′-diamine, tris (8-hydroxyquinoline) aluminum, potassium chloride,...
A multilayer organic light-emitting diode (OLED) has been fabricated with a thin (1nm) potassium chloride (KCl) layer inserted inside an electron transport layer (ETL), tris (8-hydroxyquinoline) aluminum (Alq 3 ). The structure of device was ITO/NPB/Alq 3 /KCl/Alq 3 /Al. The KCl layer was inserted inside 60nm Alq 3 at 10, 20 and 30nm positions away from the Alq ...
In this letter, we have fabricated an efficient, color stable white organic electroluminescent device through the incorporation of double thin 4-(dicyanomethylene)-2-t-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) emitting layers and 4,4′-bis[N-(1-naphthyl)-N-phenylamino]biphenyl (NPB), a hole transporting and blue emitting material. The device structure is ITO/NPB 45nm/DCJTB 0.15nm/NPB...
A thin layer of samarium (Sm) was introduced in the cathode fabrication of the organic light-emitting devices (OLEDs). An efficient cathode Sm/LiF/Al used to improve the performance of OLEDs was reported. Standard N,N′-bis(1-naphthyl)-N,N′-diphenyl-1,1′-biphenyl 4,4′-diamine (NPB)/tris-(8-hydroxyquinoline) aluminum (AlQ) devices with Sm/LiF/Al cathode showed dramatically enhanced electroluminescent...
Organic light-emitting diodes with ultra thin Rubrene layer have been fabricated with the structure of ITO/hole-transport layer/Rubrene/AlQ/LiF/Al. The hole-transport layer are copper phthalocyanine (CuPc), poly(3,4-ethylenedioxythiophene) doped with polystrenesulphonic acid (PEDOT: PSS), poly(N-vinyl carbazole) (PVK), and N,N′-diphenyl-N,N′-bis(1,1′-biphenyl)-4,4′-diamine (NPB), respectively. Compared...
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