Or is it only photons from sun light.
thanks for the info. I was thinking about could we power space probes that travel away from the sun, using lasers from earths orbit. Daft idea most likely, but could not find much info on this.
(may be broke/outdated!)
Or is it only photons from sun light.
thanks for the info. I was thinking about could we power space probes that travel away from the sun, using lasers from earths orbit. Daft idea most likely, but could not find much info on this.
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you didn’t say what kind of laser you were considering. specific lasers emit light of different frequencies… e.g. He-Ne lasers (like at the supermarket checkout stand) are red (wavelength ~ 633 nm).
i think this is a question of optical efficiency – and not all photovoltaic cells will be exactly the same.
i.e. a cell will have a intrinsic efficiency curve – say voltage output vs incident light frequency. the output will probably not be exactly flat versus the frequency of visible light, and also probably not exactly zero for light that is other than visible light.
to determine whether the laser “works”, one would need to look at this curve and see if there is an output voltage at the principle frequency of this laser.
sunlight of course includes a very broad spectrum of frequencies, and so is exploiting a much wider band in this efficiency curve, and as such probably results in larger output voltages compared to that from a monochromatic source (assuming the radiant intensities were the same in both cases of course)…
cheers