Cadmium telluride is an important material for solar cells. (d) With respect to silicon, does CdTe absorb a larger or smaller portion of the solar spectrum?

Video transcript

Hi everyone. So ask those germanium absorb a greater or lesser portion of the solar spectrum than indium antimony nine. For this, we need to look at the band gaps of elemental and compound semiconductors, which we can look up for germanium give 0.67 electron volts and for indian and tomorrow night 0.18 Electron volts. The semiconductor can absorb wavelengths less than or equal to the wavelength equivalent to its band gaps. This means that the larger the wavelength, the greater the range that can be absorbed. However, the higher their energy or band gap, the smaller the wavelength. So the smaller band gap would have a larger range of wavelengths to absorb. We're looking at germanium. This has a larger band gap. I was gonna have a smaller range of wavelengths to absorb the germanium absorbs a lesser portion of the solar spectrum. Thanks for watching my video and I hope it was helpful.