Search Results - alternative energy

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  1. In order to reduce the high costs associated with renewable power, there is a need to develop highly efficient photovoltaic materials, and III-V compound semiconductors offer a higher efficiency than conventional materials. However, high production costs limit widespread photovoltaic development. The substrates used to manufacture compound semicond...
    Published: 6/6/2017
    Inventor(s): Alan Chin, Cun-Zheng Ning
    Keywords(s): Energy, Solar cells
  2. Functional coatings are essential to the development of next generation products in the textile, display, automotive, energy, and health care industries. While the performance of nanomaterial coatings is widely successful in the lab, there is no general method to form these coatings at a larger scale. Current attempts lack precision, scalability, a...
    Published: 12/12/2016
    Inventor(s): Zachary Holman, Peter Firth
  3. Controlling products like carbon dioxide from combustion systems can help chemical manufacturers adjust to the recent limit on carbon emissions by the Environmental Protection Agency. Existing control techniques use carbon dioxide as feed to generate reusable chemicals thus reducing emissions. However, manufacturers use expensive modified combustio...
    Published: 11/1/2016
    Inventor(s): Jean Andino, Selisa Rollins
  4. Unlike typical sorbents, certain moisture/humidity swing sorbents have an increased affinity for carbon dioxide as they dry out in open air, making them an excellent candidate for carbon capture and harmful emissions reduction. However, establishing the conditions for moisture swing becomes challenging as the carbon dioxide concentration in open ai...
    Published: 7/15/2016
    Inventor(s): Klaus Lackner
    Keywords(s): Environmental
  5. Smart metal-organic frameworks (MOFs) are porous, crystalline materials made of metals bonded to organic molecules (ligands) that have changeable properties when introduced to external stimuli. Changing the minimum energy required to excite an electron into a conductive state (optical band gap energy) allows control of the conductivity. Most effort...
    Published: 7/15/2016
    Inventor(s): Bin Mu, Bohan Shan
  6. 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
  7. Inverters are devices typically used in solar power generation systems to convert electric current to a more useful type, but are prone to failure and are the main cause of malfunction in solar power systems. Using transformer-less (TL) inverters is a desirable alternative because of their higher efficiency, lower size, and lower cost. However, TL ...
    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. Multi-layered CdTe solar cell devices have properties that are promising but face low conversion efficiencies and high manufacturing costs. In contrast to typical monocrystalline Si and GaAs materials, CdTe cells are made up of polycrystalline materials and thus, have poor open circuit voltages which are responsible for the low efficiencies. Theref...
    Published: 7/15/2016
  10. Hydraulic fracturing (fracking), a multi-billion dollar U.S. industry, is the process of drilling and injecting pressurized fluid into the ground to crack deep rock formations and extract trapped natural gas. The high costs associated with the fracking due to the lack of proper modeling has prompted scientists to develop methods of approximating th...
    Published: 6/29/2016
    Inventor(s): Kangping Chen
    Keywords(s): Engineering

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