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| hip hop, yuan dynasty, style, 1984, city guide, fucked up t shirts, doctor, gotham, barbs, comedian, r&b, gift set, middle aged persons, comics, insults, almost famous, x men, dance, female comics, andrew flintoff, lease, | When crystal lattices differ too much, for example, strain damages the crystals. The most efficient multijunction solar cell yet made -- 30 percent, out of a possible 50 percent efficiency -- has just two layers. profanity " "Two layers of indium gallium nitride, one tuned to a band gap of 1.7 eV and the other to 1.1 eV, could attain the theoretical 50 percent maximum efficiency for a two-layer multijunction cell. (Currently, no materials with these band gaps can be grown together.) Or profanity a great many layers with only small differences profanity in their band gaps could be stacked to approach the maximum theoretical efficiency of better than 70 percent. It remains to be seen if a p-type version of indium gallium nitride suitable for solar cells can be made. Here too success with LEDs made of the same alloy gives hope. A number of other parameters also remain to be settled, like how far charge carriers can travel in the material before being reabsorbed." |
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| Its still way too expensive, too rare to get ahold almost famous of, and will stay that way (maybe purposely for job and economic dependency reasons) for a while. Can you imagine all the jobs lost when people stop paying for electricity, or filling their cars with gas? It might be good for nature and the environment, but would be horrible at taking care of ourselves, at least without a long transition. [reply] by digitalunltd on 12/02/05 [comment buried, show commenthide comment] + 0 diggs almost famous the meat of the article: "The maximum efficiency almost famous a solar cell made from a single material can achieve in converting light to electrical power is about 30 percent; the best efficiency actually achieved is about 25 percent. To do better, researchers and manufacturers stack different band gap materials in multijunction cells. Dozens of different layers could be stacked to catch photons at all energies, reaching efficiencies better than 70 percent, but too many problems intervene. |
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