More expensive gallium arsenide thin film solar cells in research and development
University of Illinois researchers are on the silicon by a "growth" multi-layer materials, to develop lower-cost thin-film gallium arsenide solar cells.
Gallium arsenide is a semiconductor compound, can be used to produce solar cells, and energy conversion efficiency than conventional silicon-based solar cells more potential.
Currently, researchers have to make conversion efficiency of 25% to 30%. However, the high manufacturing cost is still the great obstacle to technology commercialization.
The School of Materials Science and Engineering Department of Chemistry, professor JohnRogers, and another professor XiulingLi, are looking for lower-cost technology to produce gallium arsenide film. At the same time, they also hope to find a common way to make the production of film for a variety of devices.
Production of gallium arsenide solar cells is usually in a small piece of silicon compounds on the deposition until the thin layer formed on the surface. The school's researchers are changing the way the layers of silicon deposited on the surface of gallium arsenide. This structure, the thin layer of gallium arsenide and aluminum arsenide are arranged alternately, looks like Americans eat the same school.
"Using this method, we can use faster and less cost, to get more product." Rogers said Professor, "Although we produce only thin, but the total point of view, we produce material much more. "
"If a thin layer of growth can be 10, it means to be the 10 only a thin layer of silicon," Electrical and Computer Engineering, Professor Li said. "If you took 10 times the growth response, then the reaction process of installation and removal of silicon, and the subsequent heating and cooling, need a lot of time if the machine, material preparation, time and personnel factors taken into account, our method can greatly reduce production costs. "
The study group in the journal Nature published a paper to clarify the process for three devices - light sensors, high-speed transistors and solar cells. They will also be made of this material compared with other materials.
The paper's authors, two are Semprius's scientists. The company is located in North Carolina, USA, is an emerging enterprise, the goal is to use the technical study group to produce solar cells.
The subject of the study group funded by the U.S. Department of Energy and U.S. National Science Foundation.
Ministry of Economic Affairs or the United States will be exempt from LG Chem battery factory fifteen years car tax
South Korea's largest chemical company sales of LG Chemical (LG Chem Ltd.) And its wholly owned subsidiary Compact Power Inc. Has said the U.S. government is likely to be exempt from Holland up to $ 48 million of its tax. LG Chem, such tax to the local renewable energy demonstration zones established after the required 15 years of payments.
It is reported that Holland has recently approved LG Chemical municipal government in the establishment of a local renewable energy demonstration zones, and agreed to waive its $ 48 million in taxes. Currently, the project has been submitted to the U.S. State Department officials of Ministry of Economic Development for final approval.
The area of renewable energy demonstration projects in the United States, Holland LG Chem to build cars with lithium battery factory city part of the plan.
Currently, LG Chemical is the U.S. city of southeast Michigan, Holland construction of a car with a lithium battery factory. The plant covers an area of 650,000 square feet, production will generate 300 jobs. In addition, the first year after the commissioning of the plant is expected to produce 15 million set of lithium batteries.
Other Electronics News: