摘要:
Provided is a method of forming a fine pattern having a pattern dimension of 1 μm or less, repeatedly with reproducibility. The method of forming the fine pattern includes: forming an azobenzene-functionalized polymer film on an etched layer; irradiating the azobenzene-functionalized polymer film using an interference laser beam to form a patterned azobenzene-functionalized polymer film having fine-patterned surface relief gratings by a photophysical mass transporting of the azobenzene-functionalized polymer; etching the etched layer using the azobenzene-functionalized polymer film having the surface relief grating patterns as an etching mask; and removing the patterned azobenzene-functionalized polymer film.
摘要:
Provided is a method of manufacturing a nitride-based semiconductor light-emitting device having an improved structure in which optical extraction efficiency is improved. The method of manufacturing a nitride-based semiconductor light-emitting device including an n-doped semiconductor layer, an active layer, a p-doped semiconductor layer, an n-electrode and a p-electrode includes: forming an azobenzene-functionalized polymer film on a base layer by selecting one layer from the group consisting of the n-doped semiconductor layer, the p-doped semiconductor layer, the n-electrode and the p-electrode as the base layer; forming surface relief gratings of a micro-pattern caused by a photophysical mass transport property of azobenzene-functionalized polymer by irradiating interference laser beams onto the azobenzene-functionalized polymer film; forming a photonic crystal layer using a metal oxide on a recessed gap of the azobenzene-functionalized polymer film, and removing the azobenzene-functionalized polymer film.
摘要:
A backlight unit for a liquid crystal display (LCD) using a light emitting diode (LED) is provided. The backlight unit includes a blue light source, a red light source, and a green light source. The green light source includes an ultraviolet (UV) LED and a green phosphor excited by light emitted from the UV LED.
摘要:
In a light emitting diode, a first semiconductor layer supplies electrons, and a second semiconductor layer supplies holes. An active layer is formed between the first and second semiconductor layers. The active layer receives electrons and holes, and emits light in response to coupling between the electrons and the holes. A first reflective layer is formed on a bottom portion of the first semiconductor layer, and a second reflective layer is formed on a top portion of the second semiconductor layer. The light emitted from the active layer exits toward a side of the active layer.
摘要:
Provided are a highly transmissive optical thin film having an improved structure, in which, optical reflection (due to a difference in the refractive index between a semiconductor material and the air, when light is extracted from a semiconductor light emitting device into the air) may be suppressed, an optical output loss may be reduced and light transmittance efficiency may be maximized or increased, a semiconductor light emitting device having the same, and methods of fabricating the same. The optical thin film may include a first material layer having a first refractive index, a second material layer formed on the first material layer and having a second refractive index that is smaller than the first refractive index, and a graded-refractive index layer interposed or inserted between the first material layer and the second material layer and having a multi-layer structure in which refractive index distribution gradually decreases in the range between the first refractive index and the second refractive index as the refractive index distribution progresses from the first material layer toward the second material layer.
摘要:
A flexible display using semiconductor light-emitting devices and a method of fabricating the same are provided. The flexible display includes: a flexible pliable substrate; a display unit with semiconductor light-emitting devices arranged in pixels on the pliable substrate and which produces an image; and first and second circuit layers driving the semiconductor light-emitting devices. The flexible display having the above-mentioned configuration provides flexibility and the semiconductor light-emitting devices offer a high emission efficiency and a long lifespan.
摘要:
A backlight unit for a liquid crystal display (LCD) using a light emitting diode (LED) is provided. The backlight unit includes a blue light source, a red light source, and a green light source. The green light source includes an ultraviolet (UV) LED and a green phosphor excited by light emitted from the UV LED.
摘要:
Provided is a red phosphor represented by formula 1: (Li(2-z)-xMx)(MoO4)y:Euz,Smq (1) where M is an element selected from K, Mg, Na, Ca, Sr, and Ba, 0≦x≦2, 0.5≦y≦5, 0.01≦z≦1.5, and 0.001≦q≦1.0. The red phosphor has emission characteristics such as high brightness when excited by, in particular, an excitation light source of around 405 nm. The red phosphor is 6 times brighter than conventional phosphors. Furthermore, the red phosphor can be used in a red light emitting diode (LED) that has a UV excitation light source, a white LED, and an active dynamic liquid crystal device (LCD). In addition, the white LED using the red phosphor has a color rendering index of 90 or greater and so has excellent color rendition.
摘要:
In a light emitting diode, a first semiconductor layer supplies electrons, and a second semiconductor layer supplies holes. An active layer is formed between the first and second semiconductor layers. The active layer receives electrons and holes, and emits light in response to coupling between the electrons and the holes. A first reflective layer is formed on a bottom portion of the first semiconductor layer, and a second reflective layer is formed on a top portion of the second semiconductor layer. The light emitted from the active layer exits toward a side of the active layer.
摘要:
A light emitting device having a monolithic protection element and a method of fabricating the light emitting device are provided. The light emitting device includes: a light emitter having a cathode and an anode; and the resistive protection element connected to the light emitter in parallel through the cathode and the anode. Here, a resistance Rs of the resistive protection element has a value between a forward resistance Rf and a reverse resistance Rr of a current of the light emitter.