1073Views6Replies

Author Options:

Solar Cell Light Absorption. Answered

What wavelengths of light get absorbed into a standard monocrystalline solar panel? (I.e. infrared, red, blue ultraviolet)  I think it is ultraviolet but I can’t clarify this online.
.

6 Replies

user
charlieb000 (author)2013-03-04

The most efficent solar panels use GaAs. the same material in IR leds, so that is my choice. Wikipedia suggests that single colour light is more efficient than the whole spectrum and never said any colour specifically. the quantum dots technique is used in LEDs is like phosphor to create white and other LEDs. in solar panels it would serve to change the UVA, violet and blue to lower frequencies (this is an assumption). Glass does not pass UVB. A solar panel based on Pixel Qi's coloured backlight may be more efficient.

Select as Best AnswerUndo Best Answer

user
physics_dude (author)2010-03-02
Ok, but witch wavelength is most efficient?

Select as Best AnswerUndo Best Answer

user
jeff-o (author)2010-03-02

Solar cells are manufactured to be optimized for wavelengths that can reach Earth's atmosphere.  So, everything from UV to IR.  But, they can be made outside that range.

Here's the wikipedia entry.

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)jeff-o2010-03-02

Yes, I've got a couple of space-grade Gallium Arsenide cells somewhere which have an amazing spectral range.

Select as Best AnswerUndo Best Answer

user
jeff-o (author)steveastrouk2010-03-02

Nice!  If you ever send a balloon into near-space, you could put them to good use.  ;)

Select as Best AnswerUndo Best Answer