Electronics and Telecommunications Research Institute

Mun Cheol Baek

Sung Woo Choi

Kyu Hwan Shim

Hae Gwon Lee

Kyoung Ik Cho

Kee Soo Nam

Gyu Hwan Sim

Hae Kwon Lee

Ki Soo Nam

Provided with a method of fabricating a 200-250 nm short-wavelength optoelectronic device, which has a combination of an optical device with a plurality of acceleration electrodes and a field emission device with a plurality of acceleration electrodes, from a semiconductor having a 5-6 eV energe band gap, based on a principle that an electron-hole pair is produced using a highly energetic electron which is injected from a field emission device, and short-wavelength photons are emitted when the electron recombines with the hole and confined in a quantum well to emit a light corresponding to the energy level of the quantum well, thereby eliminating the need of using dopants for forming n-p junctions in the semiconductor and achieving high efficiency in terms of energy because highly energetic electrons result in one or more electron-hole pairs.

Short-wavelength optoelectronic device including field emission device

The present invention has been made in view of the above mentioned problem, and the present invention provides a highly integrated multicolor light emitting device which emits multiple colors in a chip by integrating light emitting devices of different colors, and in accordance with an aspect of the present invention, there is disclosed a light emitting device including: a plurality of light emitting elements formed on a substrate each of which comprises a plurality of semiconductor layers, wherein each of the plurality of light emitting elements radiates a light of different wavelength from one another.

Highly integrated multicolor light emitting device and a method for

An effusion cell assembly for epitaxial apparatus is disclosed. The assembly includes an effusion cell incluing a growing material, a heater for supplying heats with the effusion cell to effuse the growing material, a supporting plate for supporting the heater, a bolt having one end connected to the supporting plate, a cell flange coupled to a lower flange of an adaptor for supporting the cell assembly, bellows fixed between the supporting plate and the cell flange including the bolt, and a control nut for expanding and contracting the bellows so as to separate only the cell assembly from a vacuum chamber with entire vacuum maintained in the vacuum chamber and local vacuum released in the cell assembly. The epitaxial apparatus further includes a control valve located between an entrance flange of the vacuum chamber and an upper adaptor flange of the adaptor for introducing and maintaining vacuum in the vacuum chamber.

Effusion cell assembly for epitaxial apparatus

Growing community of inventors

Daejeon, South Korea

Mun Cheol Baek