Abstract:
Provided are a hybrid white organic light emitting diode (OLED) and a method of fabricating the same. A HOMO level difference between a fluorescent emission layer and an electron transport layer in an organic emission layer (OLED) becomes higher than that between the other layers or a LUMO level difference between a fluorescent emission layer and a hole transport layer is higher than that between the other layers, so that a recombination region is restricted to a part of an emission layer to obtain high-efficiency fluorescent light emission. In addition, triplet excitons that are not used in a fluorescent emission layer are transferred to an auxiliary emission layer formed to be spaced apart from a recombination region by a predetermined distance to emit light in a different color from the fluorescent emission layer, so that both singlet and triplet exicitons formed in the OLED are used to obtain high-efficiency white light emission.
Abstract:
A method of fabricating an organic thin film transistor (OTFT) using surface energy control, whereby a gate electrode 120 is formed on the surface of a substrate 110, an insulating layer 130 is then deposited over the substrate 110 and the gate electrode 120, the surface energy of the insulating layer 130 is controlled and an organic semiconductor is deposited thereon to form a channel layer 150, the source 160 and drain 170 electrodes are then deposited onto the organic semiconductor channel layer 150. Alternatively a self-assembled monolayer (SAM) may be deposited between the insulator 130 and the organic semiconductor channel 150. Preferably the surface energy of the insulating layer 130 is controlled by irradiating the surface with UV light, such that the polarity of the insulating surface 130 matches the polarity of the organic semiconductor material.
Abstract:
A white organic electro luminescence device and a method for manufacturing the same are provided to acquire a white light emitting characteristic having a high purity by forming a trap light emitting layer between a hole layer and an electron layer. A white organic electro luminescence device includes a substrate(210), a first electrode(220), hole layers(230,240), a light emitting layer(250), electron layers(260,270), and a second electrode(280). The first electrode(220) is formed on the substrate(210). The hole layers(230,240) are formed on the first electrode(220). The light emitting layer(250) has a dopant and a host, and has a trap light emitting layer(255) which is formed on an upper part of the positive hole to have a difference of energy level between the dopant and the host. The electron layers(260,270) are formed on the upper part of the light emitting layer(250). The second electrode(280) is formed on the electron layers(260,270).