Each silicon fiber itself is an effective high-quality solar cell. Silicon fiber absorbs up to 96% of incident sunlight of a certain frequency and up to 85 % of the collected light.
As seen from this scheme, expensive silicon fibers occupy only a fraction of the volume, the rest is filled with an elastic polymer.
However, Harry Etvater, Professor of Applied Physics and Materials Science, said: ... The most important for solar cell - this is how effectively the absorption of light leads to the creation of the carriers '. Silicon fibers by Etvaterom and his colleagues are able to convert from 90 to 100% of absorbed photons into electrons - technically speaking, the fibers have an almost perfect internal quantum efficiency. ...
Such a high capacity for conversion arises due to the fact that the fibers coated with 2 to 10 % of the solar cell. When light enters the fiber, some of it is absorbed and the rest is scattered. According to Professor Etvatera, it is the interaction between the fibers in the process of scattering of light makes the mesh of fibers as effective in terms of absorption of sunlight, despite the free arrangement of individual fibers.
... - So the original plan was to place the fiber as close to each other. But when we started to count the quality of the absorption, we found that it is possible to capture more light than expected, with the help of a grid of fibers. Having developed the technology for the relatively sparse svetoulavlivaniya nets, we not only achieved an acceptable level of absorption, but also demonstrated an excellent prospect for the future improvement of the efficiency of solar cells using a grid of silicon fibers ...
Each fiber is 30 to 100 microns in length and 1 micron in diameter. ... Since silicon - an expensive component of traditional solar panels, battery, which includes only one fiftieth of the normal amount of this semiconductor may be cheaper to produce. The composite nature of the new solar cell means that it is flexible.
The next step, according to Etvatera will increase the operating voltage and the overall size of the solar cell. ... - Now we are working on solar cells in the area hundreds of square centimeters, that is, the size of a conventional solar cell ...
Etvater reported that scientists have on the way to demonstrate that the solar cells of large size will work just as well as their smaller versions.
I recommend reading:.
a. nature. SU - Ecology and Environment.
2. EkoGik - Green Technology and Ecology.
3. MeGreen - on environmentally friendly way of life for all.
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