17 results about "Semiconductor quantum wells" patented technology

The invention provides an LED device which comprises a substrate, a buffer layer, an N-type semiconductor, a quantum well active layer, an aperture layer, a P-type semiconductor, a passivation layer and a P-type electrode which are arranged in a stacked mode in the growth direction, the aperture layer comprises a plurality of insulating parts and a plurality of conductor parts, each conductor part is located between every two adjacent insulating parts, and the P-type electrode is located between the N-type semiconductor and the P-type semiconductor. The P-type electrode is arranged on the surface of the passivation layer and makes contact with part of the P-type semiconductor layer, a transmission-type grating structure is further arranged on the light-emitting side of the LED device, the orthographic projection of the transmission-type grating structure on the substrate and the orthographic projection of the conductor part on the substrate at least partially coincide, and the transmission-type grating structure is used for filtering light emitted by the quantum well active layer. Stray light is removed; the stray light emitted by the LED device can be removed, the emitted light color is more uniform, and the lighting effect of the LED device is enhanced.

The present disclosure provides a method for preparing a semiconductor quantum well structure, comprising: forming an n-type semiconductor layer on one side of a substrate; forming a multi-quantum well structure on the side of the n-type semiconductor layer facing away from the substrate, the multi-quantum well structure comprising quantum barrier layers and quantum well layers that are alternately arranged, the material of the quantum well layer comprising: indium gallium nitride, the quantum barrier layer comprising: a barrier layer base layer and a barrier layer modulation layer located on the side of the barrier layer base layer facing away from the substrate, the barrier layer modulation layer comprising a plurality of first raised stripes that are periodically arranged along a preset first direction, the quantum well layer comprising: a well layer base layer and a well layer modulation layer located on the side of the well layer base layer facing away from the substrate, the well layer modulation layer comprising a plurality of second raised stripes that are periodically arranged along a preset second direction, one of the preset first direction and the preset second direction being a circumferential direction of the substrate, and the other being a radial direction of the substrate; forming a p-type semiconductor layer on the side of the multi-quantum well structure facing away from the substrate.

Provided is a semiconductor light-emitting element. The semiconductor light-emitting element comprises: a substrate, an electron-type semiconductor, quantum wells, an electron-blocking layer and a hole-type semiconductor, which are sequentially stacked, wherein respective optical parameters of a first quantum well, a second quantum well and a third quantum well among the quantum wells are distributed in a gradient manner in at least one direction; each quantum well comprises a periodic structure composed of a well layer and a barrier layer; a thermal expansion coefficient of the well layer is less than or equal to a thermal expansion coefficient of the barrier layer; an elastic coefficient of the well layer is less than or equal to an elastic coefficient of the barrier layer; a lattice constant of the well layer is greater than or equal to a lattice constant of the barrier layer; and a spontaneous polarization coefficient of the well layer is less than or equal to a spontaneous polarization coefficient of the barrier layer. By designing optical parameters of quantum wells to be distributed in a gradient manner in at least one direction, the reflection and refraction of light can be improved, and the light emission angle of emergent light is increased, thereby improving light extraction efficiency. Moreover, by designing parameter differences of the quantum wells, the thermal mismatch and lattice mismatch of the quantum wells can be reduced.

The invention discloses a semiconductor light-emitting element with a high transverse current expansion layer, which sequentially comprises a substrate, an n-type semiconductor, a quantum well, an electron blocking layer, a p-type semiconductor and the high transverse current expansion layer from bottom to top, and is characterized in that the thickness of the high transverse current expansion layer is 0.1-500nm; and the high lateral current expansion layer is any one or any combination of an InGaN / AlGaN superlattice, a GaN / AlInGaN superlattice, a GaN / AlGaN superlattice and an AlInGaN / AlGaN superlattice. According to the invention, the interface Philips ionization steep degree and the interface Philips ionization uniformity of the high lateral current expansion layer and the p-type semiconductor and the high lateral current expansion layer and the metal electrode material are regulated and controlled, the interface state and the interface resistance of the high lateral current expansion layer are reduced, and the interface conductivity of the high lateral current expansion layer is improved; the voltage of the light-emitting diode is reduced.

The invention discloses an inter-band and inter-sub-band hybrid TM electric absorption modulator which comprises a quantum well structure. The quantum well structure comprises at least one quantum well and at least one barrier; the quantum well is provided with a conduction band bottom energy level and at least one conduction band high-order energy level; the conduction band high-order energy level and the conduction band bottom energy level have the same energy difference as the designed absorbed photons. On the basis of conventional inter-band absorption, the width of a quantum well and the height of a barrier are ingeniously designed and adjusted, multiple conduction band energy levels are increased, modulatable sub-band absorption with the same absorption energy as the inter-band absorption is achieved, the quantum efficiency upper limit of the electric absorber can be increased, and the quantum efficiency of the electric absorber can be improved. The invention provides that inter-band and inter-band absorption is simultaneously used in a semiconductor quantum well to realize electro-absorption modulation on the same operating wavelength for the first time in the industry and academic circles, and has extremely high requirements on accurate calculation and design of an energy band.

The present invention relates to the field of optical communication technologies, and particularly relates to a semiconductor quantum well laser and a preparation method thereof. The epitaxial structure of the laser includes a substrate, a buffer layer, a lower confinement layer, an active layer, an upper confinement layer, and a contact layer, which are sequentially arranged from bottom to top; a ridge waveguide and a plurality of etching grooves are provided on the upper protective layer, the etching grooves are distributed on the ridge waveguide, and the etching grooves divide the ridge waveguide into a plurality of discontinuous ridge waveguide segments. The present invention realizes effects similar to chirping, apodization, or phase shift grating to achieve a narrow linewidth output, and at the same time, complex processes such as grating manufacturing and secondary epitaxial growth can be avoided, simplifying the preparation process of the laser.

The invention discloses a quantum well width prediction method, device, equipment and product of a semiconductor quantum well, and relates to the technical field of semiconductors. The quantum well width prediction method of the semiconductor quantum well comprises the following steps: sorting energy levels in a to-be-realized target energy level sequence according to energy values to obtain a sorted target energy level sequence; extracting energy level features of the sorted target energy level sequence to obtain target energy level features; and taking the target energy level feature as the input of a pre-trained quantum well width prediction model for operation to obtain a predicted quantum well width corresponding to the target energy level sequence. According to the quantum well width prediction method, device, equipment and product of the semiconductor quantum well, rapid and automatic direct solution from the target energy level sequence to the quantum well width can be achieved, and the problem that a traditional quantum well width design method is low in efficiency is solved.

The present invention proposes a semiconductor light-emitting element with a carrier leakage suppression layer, comprising a substrate, an n-type semiconductor, a quantum well, and a p-type semiconductor, arranged sequentially from bottom to top. A first carrier leakage suppression layer and a second carrier leakage suppression layer are disposed between the p-type semiconductor and the quantum well, with the first carrier leakage suppression layer positioned below the second carrier leakage suppression layer. Both the first carrier leakage suppression layer and the second carrier leakage suppression layer have electron effective mass distribution characteristics and dielectric constant distribution characteristics. The present invention regulates the interface variation angle and interface uniformity of the electron effective mass and dielectric constant at the interface between the first carrier leakage suppression layer and the quantum well, as well as at the interface between the second carrier leakage suppression layer and the first carrier leakage suppression layer and the p-type semiconductor, thereby modulating the interface energy band and interface band order at multiple interfaces, thereby raising the electron overflow barrier and reducing the probability of electron overflow into the p-type semiconductor.

The invention relates to the technical field of semiconductor photoelectric devices, and particularly discloses a GaN-based semiconductor light-emitting element with a two-dimensional hole injection layer. The GaN-based semiconductor light-emitting element with the two-dimensional hole injection layer sequentially comprises a substrate, an n-type semiconductor, a quantum well and a p-type semiconductor from bottom to top, and is characterized in that the two-dimensional hole injection layer and an electron blocking layer are arranged between the p-type semiconductor and the quantum well; according to the GaN-based semiconductor light-emitting element with the two-dimensional hole injection layer, the electron affinity of the interface among the two-dimensional hole injection layer, the electron blocking layer, the p-type semiconductor and the quantum well and the interface change angle and the interface uniformity of breakdown field strength are regulated and controlled; the hole injection barrier of the interface of the two-dimensional hole injection layer and the quantum well is reduced, the electron overflow barrier of the interface of the two-dimensional hole injection layer and the electron blocking layer is improved, the efficiency of hole injection of the quantum well is improved, and therefore the photoelectric conversion efficiency WPE of the semiconductor light-emitting element is improved.

The present invention relates to the field of semiconductor optoelectronic device technology, and specifically discloses a GaN-based semiconductor light-emitting element with a two-dimensional hole injection layer. The GaN-based semiconductor light-emitting element with a two-dimensional hole injection layer comprises, from bottom to top, a substrate, an n-type semiconductor, a quantum well, and a p-type semiconductor, and is characterized in that a two-dimensional hole injection layer and an electron blocking layer are provided between the p-type semiconductor and the quantum well. The GaN-based semiconductor light-emitting element with a two-dimensional hole injection layer reduces the hole injection barrier at the interface between the two-dimensional hole injection layer and the quantum well, and increases the electron overflow barrier at the interface between the two-dimensional hole injection layer and the electron blocking layer, thereby improving the efficiency of hole injection into the quantum well and the photoelectric conversion efficiency (WPE) of the semiconductor light-emitting element.

This invention relates to the field of semiconductor optoelectronic device technology, specifically disclosing an epitaxial structure for a group III nitride semiconductor light-emitting element. The epitaxial structure of this group III nitride semiconductor light-emitting element, from bottom to top, includes a substrate, an n-type semiconductor, a quantum well, a p-type semiconductor, and a high electron mobility contact layer above the p-type semiconductor. The peak position of the high electron mobility contact layer has a decreasing angle φ towards the quantum well, the valley position of the peak velocity electric field of the high electron mobility contact layer has an increasing angle β towards the quantum well, the valley position of the hole mobility of the high electron mobility contact layer has an increasing angle γ towards the quantum well, and the valley position of the longitudinal sound velocity of the high electron mobility contact layer has an increasing angle θ towards the quantum well. This epitaxial structure of the group III nitride semiconductor light-emitting element can improve hole migration efficiency and injection efficiency, and reduce voltage variation under aging conditions.

The present invention provides a semiconductor / metal / semiconductor quantum well structure, characterized by comprising a first semiconductor layer, a metal Al thin film layer, and a second semiconductor layer, wherein the metal Al thin film layer is interposed between the first and second semiconductor layers, and the metal Al thin film layer is a single crystal with a unique orientation and no twins. The present invention also provides a method for preparing the semiconductor / metal / semiconductor quantum well structure. The metal Al thin film produced by the two-step epitaxial growth method has a smooth surface, high single crystal quality, no twins, and low optical loss. The semiconductor / metal / semiconductor quantum well structure can be used in semiconductor quantum information devices.

This invention proposes a nitride semiconductor light-emitting diode (LED), comprising, from bottom to top, a substrate, an n-type semiconductor, a quantum well, and a p-type semiconductor. The quantum well is a periodic structure composed of a well layer and a barrier layer. A p-type contact layer is disposed above the p-type semiconductor. The p-type contact layer exhibits saturated electron drift velocity distribution characteristics, effective light hole mass distribution characteristics, deformation potential distribution characteristics, and polarized optical phonon energy distribution characteristics. This invention can enhance hole transport and conduction in the p-type contact layer, improve the lateral and longitudinal expansion capabilities of holes in the p-type contact layer, and improve the surge capability and human body mode electrostatic discharge (HBD) immunity of the LED. The HBD immunity is improved from a pass rate of over 90% for 100–200V to over 90% for 200–500V.

The utility model discloses an inter-band and inter-sub-band hybrid TM electric absorption modulator, which comprises a quantum well structure. The quantum well structure comprises at least one quantum well and at least one barrier; the quantum well is provided with a conduction band bottom energy level and at least one conduction band high-order energy level; the conduction band high-order energy level and the conduction band bottom energy level have the same energy difference as the designed absorbed photons. On the basis of conventional inter-band absorption, the width of the quantum well and the height of the barrier are ingeniously designed and adjusted, a plurality of conduction band energy levels are increased, modulatable sub-band absorption with the same absorption energy as that of inter-band absorption is achieved, the quantum efficiency upper limit of the electro-absorber can be increased, and the quantum efficiency of the electro-absorber can be improved. The utility model provides that inter-band and inter-band absorption is simultaneously used in a semiconductor quantum well to realize electro-absorption modulation on the same operating wavelength for the first time in the industry and academic circles, and has extremely high requirements on accurate calculation and design of an energy band.

The application provides a semiconductor quantum well structure for inhibiting carrier lateral diffusion and a preparation method. The structure comprises a lower barrier layer, a quantum well layer, a nucleation structure and an upper barrier layer which are sequentially stacked. The nucleation structure is island-shaped and / or groove-shaped, and the nucleation structure does not completely cover the quantum well layer. The band gap width of the nucleation structure is not equal to the band gap width of the upper barrier layer. The application can reduce the lateral diffusion of carriers in the quantum well, thereby reducing the non-radiative recombination of carriers in the dislocation area of the quantum well structure and improving the light emitting performance of the quantum well structure. The tolerance of a laser using the quantum well structure as an active region to dislocations will be obviously improved, especially for a Ⅲ-Ⅴ semiconductor quantum well laser grown by heteroepitaxy on a silicon substrate. The application is feasible, provides a new scheme for the growth of a semiconductor quantum well structure, and will promote the application of a corresponding semiconductor quantum well laser in a silicon-based optoelectronic integrated chip.

This disclosure provides a semiconductor quantum well, its fabrication method, and a quantum well device. The semiconductor quantum well includes a substrate, a lower barrier layer, a well layer, and an upper barrier layer. The lower barrier layer is located on the substrate. The well layer is located on the lower barrier layer. The upper barrier layer is located on the well layer. The barrier height between the upper barrier layer and the well layer is greater than the barrier height between the lower barrier layer and the well layer.

The present invention includes a receiving unit that includes a first solid-state device having a semiconductor quantum well structure, and receives multiple electron spin waves, a modulation unit that includes a second solid-state device having a semiconductor quantum well structure and connected to the receiving unit, and generates a multiplexed electron spin wave by synthesizing the electron spin waves from the receiving unit, and a separation unit that includes a third solid-state device having a semiconductor quantum well structure and connected to the modulation unit, receives the multiplexed electron spin wave synthesized in the modulation unit, and separates the multiple electron spin waves from the multiplexed electron spin wave. The modulation unit is a modulation unit that has a function of superposing the multiple electron spin waves by controlling an amplitude, a phase, and a polarization degree of freedom of the electron spin waves utilizing a persistent spin helix state in crystal orientation dependence of an effective magnetic field due to a spin-orbit interaction generated in a semiconductor quantum well structure.