Search Results - fuel cells, energy

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  1. Buck converters are essential to modern electronics as they can maintain an output voltage at a desired range. Two of the main methods to accomplish this are hysteretic control and pulse width modulation (PWM). Hysteretic controllers continually monitor the output voltage and adjust it if it is too high or too low, but have bad frequency control. O...
    Published: 3/14/2017
  2. With the ever-expanding need for renewable energy sources growing, much time and energy is allocated to finding new and innovative technologies. Current membrane reactors focus on a specific class of photocatalyst or are limited to air purification only. This approach does not take into consideration a broader range of the electromagnetic spectrum,...
    Published: 2/23/2017
  3. Silicon heterojunction (SHJ) technology can provide high solar cell efficiency and low cost in high volume manufacturing. Transparent conductive oxides (TCOs), a component in SHJ cells, can help achieve good conductivity and electrical contact with metals for transferring current. However, optimizing TCO layers in SHJ solar cells requires a tradeof...
    Published: 1/24/2017
    Inventor(s): Stanislau Herasimenka
  4. Synthetic diamonds have a variety of applications, ranging from jewelry to semiconductors. One fabrication method, plasma enhanced chemical vapor deposition (PECVD), is ideal for applications that require high purity materials with minimal defects. Diamond growth utilizing PECVD employs a gas mixture of hydrogen, methane, and select dopants. These ...
    Published: 1/14/2017
  5. Compounds capable of absorbing and/or emitting light are ideal for optical and electroluminescent devices, such as organic light emitting diodes (OLEDs). Much research has been devoted to the discovery and optimization of organic and organometallic materials for use in optical and electroluminescent devices. However, despite significant advances, m...
    Published: 12/10/2016
    Inventor(s): Jian Li
  6. The vast quantity of solar panels in utility-scale solar farms makes detecting defective panels challenging. Solar farms may have upwards of five million solar modules and, to inspect them, maintenance staff must manually examine them, an often unreliable and straining approach. Power output of solar panels decreases when individual cells or module...
    Published: 7/22/2016
    Keywords(s): Fuel Cells, Energy
  7. Capturing carbon dioxide from open air to minimize harmful emissions becomes less effective with lower carbon dioxide concentration. To address this, scientists use moisture swing sorbents which are chemicals that bind to carbon dioxide in dry environments and release it when exposed to moisture. Metal-organic frameworks (MOFs) contain a metal and ...
    Published: 7/15/2016
  8. During production of silicon solar cells, there is a large percentage of cells which do not meet quality requirements. These cells include broken, low-efficiency, and other defective cells, adding up to about 5% of all the cells produced. Although low-efficiency cells can be sold at discounted prices, they typically end up in landfills. These cells...
    Published: 7/15/2016
    Inventor(s): Meng Tao, Wen-Hsi Huang
  9. A common feature in solar photovoltaic (PV) systems is that their power output is unpredictable and unstable in nature (intermittent). Various storage technologies can smooth the stochastic power output levels, but are neither cost-effective nor efficient. In addition, solar PV systems are typically connected to the power grid, letting users feed a...
    Published: 6/27/2016
    Inventor(s): Meng Tao
  10. Dielectric films, such as Silicon-Nitride and Silicon-Dioxide, are used in the production of silicon solar cells. Patterns of these films on the surface of textured silicon allow for the creation of selective, well-defined structures and metallization. A common method for patterning these films is laser removal. However, the laser causes damage to ...
    Published: 6/1/2016
    Inventor(s): Mark Bailly

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