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Both hexagonal and cubic Boron nitride (BN) are transparent at certain EMF wavelengths and cubic BN has the same structure and properties as diamond. BN can be hot pressed to produce a translucent tube that will allow high energy photons to pass through. Using this stuff, there is a good chance that the SunCell could be miniaturized to produce XUV light with the same characteristics of the SunCell and pass that light through a translucent BN tube. The key to this concept is the manufacture of the tube. BN is hot pressed just like the other ceramic materials that are used in LENR to form tubes. A refractory metal like Tungsten could be used for the heat resistance electrodes and Solar cells could surround the BN tube or an array of BN tubes. In effect using BN, the SunCell could be converted into a solid state device with no moving parts. Silver could be used as a metal vapor in the same way that occurs in the SunCell. A photonic base down shifting mechanism such as used in a florescent light bulb could be used to convert the XUV light into the visible light range usable by Solar Cells. The Boron based SunCell would have a huge cost advantage over the current SunCell design and not it is open source. http://www.ioffe.ru/SVA/NSM/Semicond/BN/figs/zunger762s.gif Most of the ultraviolet wavelengths are not absorbed.
