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Device Structure for Enhancement Mode Operation, Low On-Resistance and High Breakdown Voltage

A novel vertical power low-loss semiconductor multi-junction device in III-nitride and non-III-nitride material systems, which aims at providing enhancement mode (normally-off) operation alongside ultra-low on resistance and high breakdown voltage. 

A Highly-Efficient Near-Field Wireless Power Transfer System That Is Immune To Distance And/Or Coupling-Coefficient Variations

UCLA researchers in the Department of Electrical Engineering have developed a novel design for a wireless power transfer system! This new design is optimized to function stably over a greater and variable distance than current systems and to function with a higher efficiency.

Increased Light Extraction with Multistep Deposition of ZnO on GaN

A method of depositing ZnO on III-nitride materials using a multistep approach involving the deposition of a thin seed layer followed by the deposition of a thicker bulk layer.

Enhanced Light Extraction LED with a Tunnel Junction Contact Wafer Bonded to a Conductive Oxide

A method of bonding transparent conductive oxides on III-nitride materials using wafer bonding techniques.

III-Nitride Tunnel Junction with Modified Interface

A method for improving the performance of semipolar III-nitride light-emitting devices. 

High-Efficiency Nitride-Based Nanorod LEDs

A robust and scalable process for the formation of nanorod arrays using nanosphere lithography.

High Light Extraction III-Nitride LEDs with Zinc Oxide

A method and structure for zinc oxide (ZnO)-deposited, high light-extracting III-nitride light-emitting diodes (LEDs).

Enhanced Light Extraction Using Colloid Lithography and Pattern Transfer Method

An easy and scalable process to pattern nano and/or micrometer-sized protuberances, also known as moth-eye arrays.

Nitride-Based LED Patterned with a Moth Eye Structure for Enhanced Light Extraction

An alternate method of patterning the surface of an LED for enhanced EXE. 

Aluminum-cladding-free Nonpolar III-Nitride LEDs and LDs

A nonpolar III-nitride LED or LD that does not require any aluminum-containing cladding layers, because the quantum well active region is thick enough to function as an optical waveguide for the device.  

Tunable White Light Based on Polarization-Sensitive LEDs

White LEDs that can change their color-rendering properties through use of a polarizing element.

High Light Extraction Efficiency III-Nitride LED

A III-nitride light emitting diode (LED) with increased light extraction from having at least one textured surface of a semipolar or nonpolar plane of a III-nitride layer of the LED.

High-Efficiency, Mirrorless Non-Polar and Semi-Polar Light Emitting Devices

An (Al, Ga, In)N light emitting device in which high light generation efficiency occurs by fabricating the device using non-polar or semi-polar GaN crystals.

Novel Enzymes Enabling Microbial Fermentation of Sugar into Long Chain Alcohols

A novel group of enzymes with the potential to facilitate production of energy dense alcohols has been discovered for use in biofuel and chemical production.

Chemical Energy Storage Based on Nanoporous Aluminum

Researchers in the Department of Chemistry and Biochemistry at UCLA have developed a novel form of nanoporous aluminum hydride for storing hydrogen at room temperature and pressure.

System and Methods for Optimizing Availability and Performance of Light Water Reactors

More than a quarter of the world's carbon dioxide emissions come from burning fossil fuels to produce heat and electricity. Nuclear energy plants do not emit criteria pollutants or greenhouse gases when they generate electricity. Thermal-neutron reactors are the most common type of nuclear reactor, and light water reactors (LWRs) are the most common type of thermal-neutron reactor, which uses normal water as the primary coolant. Localized corrosion in the primary coolant circuits (PCC) is a big problem in LWRs. The rate of corrosion is often determined by certain electrochemical properties, such as the electrochemical corrosion potential (ECP), solution conductivity, temperature, pH, flow rate, and the kinetics of the reduction of a cathodic depolarizer (e.g. O2) on the surfaces external to the crack. Mechanical loading (stress intensity factor on the crack) and micro-structural/micro-chemical factors (e.g. grain size, precipitates, degree of sensitization) may also contribute to this problem. To address this problem, researchers at the University of California, Berkeley, have developed an operating protocol in which the PCC are protected over wide ranges of parameters as the reactor progresses through a fuel cycle, including: temperature, pH, ECP, solution conductivity, flow rate, and stress intensity factor. Laboratory models using Berkeley approach suggest significant LWR optimization while adding levels of safety and lowering operational costs (e.g., by avoiding primary water stress corrosion cracking in Alloy 600 steam generator tubes, which is a major corrosion phenomena in operating a PWR). In fact, Berkeley’s solutions require minimal modification to the reactor PCC, and in most cases, can be implemented with no modifications at all.

A Novel, Eco-Friendly Continuous Flow Intersection

Background: Traffic signals at traditional intersections impede traffic flow thereby increasing harmful emissions, travel time and fuel-energy consumption. With over 250 million vehicles on the road, many municipalities are seeking novel ways to improve the current intersection design to be eco-friendly and safe for both drivers and pedestrians.  Brief Description: Unconventional Arterial Intersection Design (UAID) is the current approach in improving operative and safety performance in intersections for 2 approaching vehicle trajectories. UCR researchers have achieved real continuous flow and unsignalized intersections for all 4 vehicle trajectories. This novel design allows drivers to maintain their speed limit throughout the intersection and get from point A to B without ever stopping. As a result, it increases traffic capacity and land utilization while decreasing commute time and the likelihood of accidents by a 4-fold. They have also implemented a novel pedestrian passageway that protects them from pedestrian fatalities and direct exhaust emissions.

Planar, Nonpolar M-Plane III-Nitride Films Grown on Miscut Substrates

A method for growing planar nonpolar III-nitride films that have atomically smooth surfaces without any macroscopic surface undulations. 

Transparent Mirrorless (TML) LEDs

Minimizes the re-absorption of LED light by using transparent conductive oxide electrodes (ITO or ZnO) instead of mirrors. 

BRIGHT: Building With Radiant And Insulated Green Harvesting Technology

People spend a large part of the day inside a building for different purposes, e.g. living, working, and shopping. Lighting is one of the largest categories of end-use energy consumption in the commercial sector. In 2014, the Department of Energy reported that approximately 40% of total U.S. energy was consumed in residential and commercial buildings and costing $50 billion each year. Commercial buildings account for over 70% of U.S. electricity use and lighting accounts for approximately 30% of the building use. Traditional approaches have implemented passive or active efficient energy strategies, like electronic ballasts, LED technologies, compact fluorescent lamps, occupancy sensors, and common light bulb standards. One problem is that each of these technologies require a power supply or battery. Another problem is all of these have a lifetime and a replacement cost. To address these challenges, researchers at the University of California, Berkeley, have demonstrated a smart dynamic panel system for capturing and channeling daylight without gains and/or losses of heat and without compromising the structure of the building. The designed translucent panel for building envelopes (i.e. facades and/or roof) is a modular element that can be used as the primary physical separator between the conditioned and unconditioned environment, or can also be used in specific parts of the designed building, or can be used in retrofitting existing buildings. The prototype panel has validated many useful aspects of the innovation including observations that report improvements of around 150-300% in the maximum light that is transmitted with light concentrators and modified optical fiber tips compared to a translucent panel with only embedded optical fibers with flat tips. From the analysis of operational energy, the panel is also shown to reduce the total energy consumption (heating, cooling, lighting, and fans) by 36%, which in turn curtails CO2 emissions by 34%. 

Highly Accurate Occupancy Estimation Using RF Signals and Wi-Fi

A framework that counts the number of people in an area based on RF signals and a Wi-Fi card or network. 

Piezoelectric Nanoparticle-Polymer Composite Foams

Mechanically flexible piezoelectric materials are highly sought after when building advanced sensors, actuators, and energy scavenger devices. The most common piezoelectric materials used in applications are focused on electroceramic thin films made from lead zirconate titanate or barium titanate. Although these materials can have large piezoelectric moduli, as thin films they are extremely brittle and difficult to shape into highly mechanically compliant structures. Improving mechanical flexibility of piezoelectrics, and creating higher order structures, is critical for driving new applications such as biological energy harvesting, compact acoustic transducers, and in vivo biodiagnostics.  There is a need to develop alternative materials that offer high piezoelectric coefficients while maintaining elasticity and isotropic mechanical integrity—that are also cheap to produce.

Growth of High-Performance M-plane GaN Optical Devices

A method using MOCVD growth conditions to achieve high performance m-plane GaN optical devices, including LEDs and LDs. 

Autonomous Thermoelectric Energy-Harvesting Platform for Biomedical Sensors

UCLA researchers in the Department of Electrical Engineering have a developed miniature implantable thermoelectric energy-harvester with true energy autonomy.

UV Optoelectronic Devices Based on Nonpolar and Semi-polar AlInN and AlInGaN Alloys

A device structure that can be used to create high-power and high-efficiency LEDs and LDs in the UV range of the spectrum. 

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