Thermal photovoltaic equipment can break through the limit of the photoelectric conversion rate?

According to the U. S. at the Massachusetts institute of technology's website, the school first scientists to show that the use of solar photovoltaic equipment ( STPVs) And photoelectric conversion efficiency of solar cells is expected to break through the theory of limit. The latest research of the basic principle is simple: don't make solar electricity

according to the Massachusetts institute of technology's official website, the school for the first time, scientists proved that the photoelectric conversion efficiency of solar cells is expected to be through the use of solar thermal photovoltaic equipment breaks through the theory of limit. The basic principle of the latest research is very simple: solar cells cannot use energy won't be in the form of heat dissipation. All the energy and heat is absorbed by an intermediate components first, takes the element to be able to reach the temperature of the thermal radiation. Layer by adjusting the additive material and structure, radiant energy release using appropriate wavelength of light, the light can only be captured by solar cells, so as to improve the photoelectric conversion efficiency of the system and to reduce the fever of solar cells. The study is the key to using nano photonic crystals, when heated, it can accurate wavelength of light. During the test, the nano photonic crystals are integrated into a set of vertical alignment of carbon nanotubes in the system. When the device is heated to 1000 degrees Celsius, the photonic crystals will be continuous release of wavelength and adjacent photovoltaic cells can capture the wavelength of the light with a match exactly. Photovoltaic cells to capture the light, will be transformed into current. The researchers used STPVs module test the photovoltaic cells, the result is consistent with theoretical predictions. Since 1961, the people already know that traditional photoelectric conversion efficiency of solar cells exist in the Shockley amplifier; Point; Docklands efficiency limit. For now it is widely used in solar panels of single-layer silicon solar cells, and transform the limit is 32%. However, there are some ways to improve the overall efficiency of solar panels, such as using multilayer battery using solar panels or equipment before the power converting sunlight into heat. Published in the new issue of the journal nature. Point; The journal of energy's latest study adopted the latter method. The study authors davidamp point; Bill, 'said theory predicts, points out that through combines conventional solar cells and other high-tech material layer, the conversion efficiency can reach more than twice the theoretical limit. Compared with the traditional photovoltaic devices, this new system has obvious advantages. First of all, photonic devices based on radiation heat rather than light, which means it won't be affected by the environment changes. Secondly, it combined with heat storage system, can continue to use the solar energy. 'Research has shown that we can actually break Shockley amplifier. Point; Terminal efficiency limit '. Next, they plan to make this a bigger version of solar cells, and find a way to lower the manufacturing cost. In general, see heat on the solar battery is not a good thing - — It is a waste of energy, it may interfere with the normal operation of the battery. However, in the latest material structure, heat can't escape, on the contrary, carbon nanotubes to convert heat energy back into the light. This is to reduce the effect of the waste heat, and at the same time increase the panel capacity in a particular area. The technology is still in the laboratory, it is difficult to mass produce complex carbon nanotubes. However, this promising technology practical application is only a matter of time.