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MIT to Promote Ultra-thin Solar Cell Research New Direction

Author: Source: Datetime: 2016-10-08 13:52:51
Massachusetts Institute of Technology (MIT) researchers are working to create the world's thinnest solar power batteries design, and look forward to solar cell research to promote the development of another new direction. According to the researchers, although the current solar power batteries design most of the pursuit of the lowest cost to achieve high conversion efficiency, but often overlooked in the light size requirements. However, for mobile electronic devices, the light and thin has always been the most important design goals, and solar power batteries design has always stressed the high conversion efficiency.

Today, according to MIT, both light and thin solar power batteries designs are becoming increasingly popular in remote areas such as aerospace, space applications, and high transportation costs. The future, with the material becomes increasingly scarce, the use of ultra-thin solar cells ( one part for solar power generator) can be realized for the protection of natural resources, and even reduce installation costs. MIT professor Jeffrey Grossman: As for how to become the thinnest solar cell? Our prediction is to use only two layers of material for the battery design. Jeffrey Grossman and the postdoctoral researcher Marco Bernardi, and Maurizia Palummo, a visiting fellow at the University of Rome, collaborated on the study. Grossman further explained that there are a number of applications that must be considered in terms of weight, so using the thinnest active-layer material and minimizing the package as much as possible will result in a thinner, more durable substrate, which will eventually change the overall installation. In addition, it helps to solve a central question: How much energy can we save from each atom or bond in a particular material?

MIT estimates that its ultra-thin solar cell film - basically a thin layer of about 1 nm in thickness - is more than 1,000 times more energy-efficient than traditional solar solar streetlight base-price batteries. But the disadvantage is the low efficiency and the need for existing solar cells more than 10 times the area in order to produce the same amount of energy, because the efficiency of ultra-thin solar power batteries is about 2%, while the traditional solar cells (PC) can be achieved Up to 20% efficiency. However, researchers have planned to use layered solar cells stacked ultra-thin structure to improve its efficiency. "We predict that a two-layer stack could achieve efficiencies of 1-2%, but solar PV inverters can also stack up to more than two layers which is necessary for solar power generator, thus improving efficiency," Grossman said. Can achieve the current traditional PV about 10-20% efficiency.
All in One Portable Solar Power Generator
Researchers are still simulating ultra-thin solar power batteries materials used in prototype design. Through the sophisticated simulation process, a variety of topological structure of the laminated sheet using atomic graphene film, molybdenum disulfide and diselenide. The advantage of these designs is that they are not only more lightweight than traditional solar cells, but also are not affected by oxidation, UV radiation and moisture in the environment - these are usually the long-term stability of conventional solar cells Killer. In addition, compared to traditional PV installation, the new ultra-thin design does not require the use of glass or cooling installation, which can save more than half the cost. Bernardi said: ultra-thin solar cells are expected to reduce installation costs. Currently based on silicon solar cell module has been very heavy, with more protection after the glass. The current array of solar cells accounted for 60% of the total cost of installation, mainly due to weight caused. Therefore, in order to achieve lighter solar cells, we expect to find an ultra-thin mechanical flexible materials, it can be used to replace plastic glass packaging materials in order to install solar cells to establish a new direction.

Compared to traditional solar power batteries for solar powered portable generator, ultra-thin solar cell material costs are expected to significantly reduce. But the researchers have not been able to build the prototype in the laboratory, and thus can not let the material to achieve mass production. Next, the researchers intend to begin measuring the efficiency and long-term stability of the stacking structures in a variety of different materials.
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