How Does the Band Model Explain the Optical and Electronic Properties of Solids?

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The band model explains the optical and electronic properties of solids by illustrating the role of band gaps between valence and conduction bands. Electrons can be excited from the valence band to the conduction band, allowing them to move freely and conduct electricity. When these electrons return to the valence band, they release energy, often in the form of photons, which is the principle behind light emission in devices like LEDs. This process is analogous to electron transitions in atomic orbitals, where energy loss results in photon emission. Understanding these concepts is essential for exploring optoelectronic devices and their functionalities.
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Show how the band model can explain the relationship between the optical and electronic properties of solids?

any ideas one were to start looking? lost with this question
 
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Do you know how LED's work or most any optoelectronic device? Basically you have a band gap that separates the valence and conduction bands. Well if you can get an electron up into the conduction band then it is free to move around. And if it drops back down to the valence band it will lose energy which is usually given off as a photon.

Similar to electrons in the orbitals of an atom. When they go from a higher state to a lower state they lose energy. That energy is converted to a photon.

Although that is just the tip of the iceberg, it should keep you fairly busy.
 
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