Abstract: A method of fabricating light emitting diodes (LED) with a colour purifying diffraction lattice (CPDL) is suggested, the essence of the invention is in the use of the coherent scattering of the light by the CPDL for colour purifying of the light emitted by the LED and enhancement its extraction efficiency, the CPDL is a hexagonal two-dimensional periodical pattern on the surface of the LED structure or an internal interface resulting in the periodical variation in the refractive index with the period d The period of CPDL satisfies the equation d=m.lamda./n, where m is a positive integer number, .lamda. is the wavelength of the light generated by LED, and n is the refraction index of LED structure. The height of the hexagonal islands forming CPDL is h=.lamda.(2l+1)/2n, l is a positive integer number or zero. Use of CPDL allows to convert the laterally propagating light into the vertically propagating and simultaneously filter its spectrum.

Abstract: A chemical vapor deposition reactor is provided. The chemical vapor deposition reactor includes a deposition chamber, a substrate within the deposition chamber, at least two inlet ports extending into the deposition chamber for supplying a first and a second gases to the deposition chamber respectively and a particle source for supplying a plurality of solid particles to the deposition chamber. The first gas reacts with the second gas to form a film incorporating the plurality of solid particles upon the substrate. Films with composition varying across the growth direction are produced by the chemical vapor deposition reactor without the use of mask layers.

Abstract: A novel NPBL and ANPL light emitting semiconductor device and a method for fabricating the same are provided. In the present invention, plural nano-particles are applied in the active layer of the light emitting semiconductor device, so that the leakage current thereof is reduced. In addition, the provided light emitting semiconductor device fabricated via a planar technology process is microscopically planar, but not planar at micro- and nano-scale. Hence the parasitic wave guiding effect, which suppresses the light extraction efficiency of the light emitting semiconductor device, is destroyed thereby.

Abstract: A method of fabricating light emitting diodes (LED) with a colour purifying diffraction lattice (CPDL) is suggested, the essence of the invention is in the use of the coherent scattering of the light by the CPDL for colour purifying of the light emitted by the LED and enhancement its extraction efficiency, the CPDL is a hexagonal two-dimensional periodical pattern on the surface of the LED structure or an internal interface resulting in the periodical variation in the refractive index with the period d The period of CPDL satisfies the equation d=m?/n, where m is a positive integer number, ? is the wavelength of the light generated by LED, and n is the refraction index of LED structure. The height of the hexagonal islands forming CPDL is h=?(2l+1)/2n, l is a positive integer number or zero. Use of CPDL allows to convert the laterally propagating light into the vertically propagating and simultaneously filter its spectrum.