Material Abstraction

A spectrophotograph of one material overlaid with the spectrophotograph of a second material. Unless context provided is, better explanation give, I cannot!

Different materials of multi-junction solar cells...

The primary graph is the standard signature of the solar energy spectrum, and the overlays are of specific chemical element substrates band response showing maximum electricity conversion for each junction as a function of wavelength for a multi-junction solar cell....

In other words, someone has chosen the junctions to match the where the sunlight has energy to harvest. I think that's called engineering.

Can we assume that other types of stars with other spectral emissions would not work efficiently with this solar cell?

That's an interesting topic to research.

At AM 0, (is this wave signature unique to burning hydrogen? How about burning other stuff, can it reliably determine its chemical composition)

NO. Hydrogen emits in discrete spectral lines only, and so does every other element. The spectrum is a continuum of wavelength (as all black body or near black body radiation is (even your home light bulb). The missing lines in the spectrum appear to be from elemental absorption lines at the cooler zones near the surface (probably above the surface) of the sun.

Other stars will have the spectral peak at a higher or lower wavelength depending on the black body effective temperature at which the radiation escapes the star. This supposedly could create a spectral mismatch to any device being used to convert that light to electric power. Fortunately, there is a way to tune devices to a portion of the spectrum to exploit the power input available.

I think AM0 refers to the solar spectrum outside our atmosphere, and does apply directly to the measurement protocol ASTM E490.

http://rredc.nrel.gov/solar/spectra/am0/

link explains AM0 refers to zero air mass (outer space).

AM1.5 Direct, measured by protocol ASTM G170 seems to be attenuated by atmospheric scattering, and also by being tilted at a 37 degree angle.

AM1.5 Global (ASTM G170) appears also attenuated but not as much as AM1.5 Direct, and probably refers to the measurement at normal incidence.

ASTM G173 - 03(2012)

Standard Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37° Tilted Surface

http://rredc.nrel.gov/solar/spectra/am1.5/
Explains the entire thing as air mass 1.5 normal incidence, or 37 degree tilt.

I see, the brilliant job of the people who organized and created the Table of Elements. They deserved an honor more than a Novel prize.

The above figure is just a product or result of the below table.

Such a brilliant tool.

I could say the planetary model of atoms still works just fine in the advent of QM.

NO. One is a color-coded periodic table. The other is apparently a solar spectrum with overlay plots of what PV material absorbs what wavelength. Not much of an overlap, IMHO.

Please explain what you are smoking today>..

Nice seeing you buddy.

''...One is a color coded-coded periodic table...."

One is a number, specifically the smallest positive integer. Round these parts at least.

Thank you Mr. Smarty Pants. I stand in awe of your razor-sharp intellect.

Don't you have anything better to do?

Yes, looking at some things just like this and making insight, things like those.

I see a monkey holding a cigarette.

Me too. Pretty much need one million of them CR4 to complete a coherency.

Yes, it is and blowing smoke in circles. That's my buddy Kulas right there.