Abstract:
An activity booking system including at least one processing device that receives a booking enquiry from a user client device via a communications network, determines an availability of one or more activity time slots using an activity schedule, provides a booking availability indication to the client device, the booking availability indication being indicative of at least one available time slot, the client device being responsive to the booking availability indication to display an indication of the at least one available time slot determine user selection of at least one available time slot in accordance with user input commands and generate a booking request indicative of a selected available time slot, the processing device receiving the booking request from the user client device and selectively modifying the activity schedule in accordance with the booking request to thereby book the time slot for the user.
Abstract:
A method of at least partially releasing an epitaxial layer of a material from a substrate. The method comprises the steps of: forming a patterned sacrificial layer on the substrate such that the substrate is partially exposed and partially covered by the sacrificial layer; growing the epitaxial layer on the patterned sacrificial layer by nano-epitaxial lateral overgrowth such that the epitaxial layer is formed above an intermediate layer comprising the patterned sacrificial layer and said material; and selectively etching the patterned sacrificial layer such that the epitaxial layer is at least partially released from the substrate.
Abstract:
A light emitting diode and a method of fabricating a light emitting diode. the diode comprises a first set of multiple quantum wells (MQWs), each of the MQWs of the first set comprising a wetting layer providing nucleation sites for quantum dots (QDs) or QD-like structures in a well layer of said each MQW; and a second set of MQWs, each of the MQWs of the second set formed so as to exhibit a photoluminescence (PL) peak wavelength shifted compared to the MQWs of the first set.
Abstract:
A growth method is proposed for high quality zinc oxide comprising the following steps: (1) growing a gallium nitride layer on a sapphire substrate around a temperature of 1000 0 C; (2) patterning a SiO 2 mask into stripes oriented in the gallium nitride or direction; (3) growing epitaxial lateral overgrowth of (ELO) gallium nitride layers by controlling the facet planes via choosing the growth temperature and the reactor; (4) depositing zinc oxide films on facets ELO gallium nitride templates by chemical vapor deposition (CVD). Zinc oxide crystal of high quality with a reduced number of crystal defects can be grown on a gallium nitride template. This method can be used to fabricate zinc oxide films with low dislocation density lower than 10 4 /cm -2 , which will find important applications in future electronic and optoelectronic devices.
Abstract translation:提出了一种用于高质量氧化锌的生长方法,其包括以下步骤:(1)在温度约为1000℃的蓝宝石衬底上生长氮化镓层; (2)将SiO 2掩模图案化成在氮化镓<111,100>或<1120>方向取向的条纹; (3)通过选择生长温度和反应器控制刻面平面,生长(ELO)氮化镓层的外延横向过度生长; (4)通过化学气相沉积(CVD)在刻面ELO氮化镓模板上沉积氧化锌膜。 可以在氮化镓模板上生长具有减少的晶体缺陷数的高质量的氧化锌晶体。 该方法可用于制造低位错密度低于10 4 / cm 2 / cm 2的氧化锌膜,这将在未来的电子和光电子器件中找到重要的应用。
Abstract:
An Organic Light Emitting Diode (OLED) which is adapted to inhibit the formation and growth of non-emissive areas known as "dark spots". The OLED comprises an anode (3) disposed on a substrate (2), a cathode (8), an electroluminescent (EL) layer (6) disposed between the anode (3) and the cathode (8) and a hole transport layer (5) disposed between the anode (3) and the EL layer (6). The OLED has a number of oxygen/moisture barriers (4, 7) disposed between one or more of the OLED's layers. These barriers (4, 7) are made from an organic polymer and are adapted to resist permeation by oxygen and moisture and inhibit metal migration.
Abstract:
An infrared detector uses step quantum wells with superlattice barriers for dual-band detection. The step quantum wells are designed to have two bound states and a continuum above the superlattice barriers. The bound-to-bound and bound-to-continuum transitions are employed for the dual-band detection. The superlattice barriers are used to extract the photocurrent from the bound-to-bound transition with a relatively low external electric field while suppressing the thermionic emission, resulting in a smaller dark current. The photocurrent is tuneable by adjusting the energy level in the step well relative to the miniband by an external bias. Stark shifts of the energy levels in the quantum well allow for discrimination of the photocurrents due to BM and BC transitions.
Abstract:
A method and system for determining charge carrier lifetime is provided. The method comprises the steps of applying an excitation signal to a device; recording electrical noise exhibited by the device; and determining the charge carrier lifetime of the device based on the recorded electrical noise.
Abstract:
A multiple quantum well (MQW) structure for a light emitting diode and a method for fabricating a MQW structure for a light emitting diode are provided. The MQW structure comprises a plurality of quantum well structures, each quantum well structure comprising: a barrier layer; and a well layer having quantum dot nanostructures embedded therein formed on the barrier layer, the barrier and the well layer comprising a first metal-nitride based material; wherein at least one of the quantum well structures further comprises a capping layer formed on the well layer, the capping layer comprising a second metal-nitride based material having a different metal element compared to the first metal-nitride based material.
Abstract:
A white light-emitting diode is fabricated by metal organic chemical vapor deposition (MOCVD), which can produce a broad band emission covering all the visible range in the spectrum by capping the Indium nitride (InN) and Indium-rich Indium Gallium Nitride (InGaN) quantum dots (QDs) in single or multiple In x Ga 1-x N/In y Ga 1-y N quantum wells (QWs) by introducing bursts of at least one of Trimethylindium (TMIn), Triethylindium (TEIn) and Ethyldimethylindium (EDMIn), which serve as nuclei for the growth of QDs in QWs. The diode can thus radiate white light ranging form 400nm to 750nm by adjusting the In burst parameters.
Abstract translation:通过金属有机化学气相沉积(MOCVD)制造白色发光二极管,其可以通过封装氮化铟(InN)和富铟铟铟氮化物(InGaN)来产生覆盖光谱中所有可见光范围的宽带发射 )量子点(QD)在单个或多个In x Ga 1-x N / In x Ga 1-y < 通过引入三甲基铟(TMIn),三乙基(TEIn)和乙基二甲基铟(EDMIn))中的至少一种的突发,其用作QW中QD生长的核子。 因此,通过调整In突发参数,二极管可以辐射400nm至750nm范围内的白光。
Abstract:
A method for forming a modified semiconductor having a number of band gaps. The first step involves providing a semiconductor having a surface and a quantum region which emits photons in response to electrical or optical stimulation, the quantum region having an original band gap and being disposed under the surface. The next step involves applying a number of layers of a number of materials to a number of selected regions of the surface, the materials being adapted to cause, upon thermal annealing, a number of different degrees of intermixing in a number of portions of the quantum region disposed immediately below each of the selected regions of the surface. The layers of materials can be applied in a dot or line pattern, or both, to increase the plurality of band gap tuning. The next step involves thermally annealing the layers to the surface such that the layers cause a number of degrees of intermixing in the different portions of said quantum region thereby shifting the original band gaps of those portions. These steps result in a modified semiconductor which exhibits a number of different band gaps in a number of portions of the quantum region depending upon the positioning of the layers of materials on the surface immediately above the respective portions of the quantum region.