摘要:
Provided are a horizontal light emitting diode (LED) device and a method for fabricating the same. The horizontal LED device includes a sapphire substrate; an n-type GaN layer disposed on the sapphire substrate; an activation layer disposed on the n-type GaN layer; a p-type GaN layer disposed on the activation layer; a current spreading layer disposed on the p-type GaN layer; a p-electrode disposed on the current spreading layer; a plurality of holes exposing the n-type GaN layer through the current spreading layer, the p-type GaN layer, and activation layer; and an n-electrode disposed on the exposed n-type GaN layer and being in ohmic contact with the exposed n-type GaN layer at a plurality of positions on bottom surfaces of the plurality of holes.
摘要:
Provided are a horizontal light emitting diode (LED) device and a method for fabricating the same. The horizontal LED device includes a sapphire substrate; an n-type GaN layer disposed on the sapphire substrate; an activation layer disposed on the n-type GaN layer; a p-type GaN layer disposed on the activation layer; a current spreading layer disposed on the p-type GaN layer; a p-electrode disposed on the current spreading layer; a plurality of holes exposing the n-type GaN layer through the current spreading layer, the p-type GaN layer, and activation layer; and an n-electrode disposed on the exposed n-type GaN layer and being in ohmic contact with the exposed n-type GaN layer at a plurality of positions on bottom surfaces of the plurality of holes.
摘要:
The present invention provides a method of fabricating a vertical type light-emitting diode and a method of separating layers from each other. Crystalline rods are provided on a lower layer or a lower substrate. The crystalline rods comprise ZnO. A layer which constitutes light-emitting diode or a light-emitting diode structure is formed on the crystalline rods, and the lower substrate is separated therefrom. The crystalline rods are dissolved during the separation. The formation of the crystalline rods is achieved by the formation of a seed layer and selective growth based on the seed layer.
摘要:
A semiconductor light emitting device and method of manufacturing the semiconductor light emitting device are provided. The semiconductor light emitting device includes a light emitting structure including a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer. The device may also includes a first electrode connected to the first conductivity type semiconductor layer, and a second electrode connected to the second conductivity type semiconductor layer and having a pad region and a finger region extended from the pad region in one direction. The second electrode may include a transparent electrode part positioned on the second conductivity type semiconductor layer and including at least one opening therein, at least one reflective part spaced apart from the transparent electrode part within the opening and disposed in the pad region and the finger region, and a bonding part positioned on at least one portion of the reflective part and including a plurality of bonding finger parts spaced apart from each other in the finger region and a bonding pad part disposed in the pad region.
摘要:
Disclosed are a nanostructure array substrate, a method for fabricating the same, and a dye-sensitized solar cell by using the same. The nanostructure array substrate includes a plurality of metal oxide nanostructures vertically aligned on the substrate while being separated from each other. The metal oxide nanostructures include nanorods having a ZnO core/TiO2 shell structure or TiO2 nanotubes. The method includes the steps of forming ZnO nanorods vertically aligned from a seed layer formed on a substrate; and coating a TiO2 sol on the ZnO nanorods and sintering the ZnO nanorods to form nanorods having a ZnO core/TiO2 shell structure. The transparency and flexibility of the substrate are ensured. The photoelectric conversion efficiency of the solar cell is improved if the nanostructure array substrate is employed in the photo electrode of the dye-sensitized solar cell.
摘要:
An electrode for a battery and a method for manufacturing the same are disclosed. The electrode for a battery according to the present invention comprising silicon nanostructures integrally formed on a silicon thin film and having a period array can reduce the internal resistance, have better charge transport properties, and reduce the structural stress, thereby exhibiting high storage capacity, high efficiency charge/discharge characteristics, and long charge/discharge cycle characteristics. Moreover, the method for manufacturing the electrode for a battery according to the present invention can simply and easily form a nanopattern with nanostructures on a silicon thin film using laser interference lithography (LIL) and dry etching.
摘要:
The present invention relates to an apparatus and method for variable fast Fourier transform. According to an embodiment of the present invention, two n-point fast Fourier transform (FFT) processors are used to generate two n-point FFT output data or one 2n-point FFT output data. The one 2n-point input data is alternately input to the two n-point FFT processors. Each of the two n-point FFT processors selects a twiddle factor for the n-point input data or the 2n-point input data and performs fast Fourier transform. A butterfly operation is performed on signals obtained by performing fast Fourier transform on the 2n-point input data signal, and the processed signals are aligned in an output order. According to this structure, it is possible to realize a fast Fourier transform hardware engine that selectively performs multi-frequency allocation in a base station system that supports the multi-frequency allocation.
摘要:
Provided are a method of preparing a zinc oxide nanostructure electrode and a method of preparing a dye-sensitized solar cell using the same. According to the present invention, the method of preparing a zinc oxide nanostructure electrode may include sequentially forming a superhydrophobic self-assembled layer and a zinc layer on a carrier substrate having a stamp pattern included therein, disposing the zinc layer on the carrier to face a first substrate and performing a stamp method to form at least one zinc pattern on the first substrate, oxidizing the zinc pattern to form zinc oxide seeds, and growing at least one zinc oxide nanostructure from the zinc oxide seeds by using a hydrothermal synthesis method to form a zinc oxide nanostructure electrode composed of the at least one zinc oxide nanostructure.
摘要:
An automatic gain control apparatus and method of a mobile station in an OFDM system are provided. The method includes identifying a preamble section and a data symbol section in a received frame signal; when a current symbol is the preamble section, measuring a power value of a preamble signal, comparing the measured power value of the preamble signal and a threshold value, and amplifying the received frame signal based on a predetermined gain; when a data symbol section includes a pilot carrier, measuring an average power value of the pilot carrier in the data symbol, comparing the measured average power value and the threshold value, and amplifying the received frame signal based on a predetermined gain; and when the data symbol section includes no pilot carrier, maintaining an existing gain, or performing an automatic gain control operation according to a gain estimated by using the pilot carrier during the data symbol section.
摘要:
A signal transmitting apparatus includes: a plurality of data transmission lines that transmit output data to a memory; a plurality of delay units that are correspondingly connected to the plurality of data transmission lines, that delay test data according to a delay signal for a predetermined time, and that output the delayed test data to each of the data transmission lines; and a transmitting/receiving controller that compares the stored data in the memory with the test data to adjust the delay signal, and that outputs the adjusted delay signal to each of the plurality of delay units. With this configuration, when data is transmitted to a memory through a data bus, a delay value can be adjusted among a plurality of signal lines constituting a data bus, and thus signal transmission can be performed uniformly.