Three infinite quantum wells, A, B and C are in a structure with the well widths as nm and 15 nm. The lowest energy levels of each are EA, E, and E.. (a) Write down the ratio of the n=1 energy level of the three wells as EA: Ea: E, in the highest energy to the lowest. (b) If the material was a direct band gap semiconductor which well would emit lig longest wavelength? Write the wavelengths Aa, Aa and Ac of emission of light A,> order of longest to the shortest in terms of A, Ag and Ac.
Three infinite quantum wells, A, B and C are in a structure with the well widths as nm and 15 nm. The lowest energy levels of each are EA, E, and E.. (a) Write down the ratio of the n=1 energy level of the three wells as EA: Ea: E, in the highest energy to the lowest. (b) If the material was a direct band gap semiconductor which well would emit lig longest wavelength? Write the wavelengths Aa, Aa and Ac of emission of light A,> order of longest to the shortest in terms of A, Ag and Ac.
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Transcribed Image Text:3. Three infinite quantum wells, A, B and C are in a structure with the well widths as 5 nm, 10
nm and 15 nm. The lowest energy levels of each are E., Es and E.
(a) Write down the ratio of the n=1 energy level of the three wells as E.: Es: E, in order of
the highest energy to the lowest.
(b) If the material was a direct band gap semiconductor which well would emit light with the
longest wavelength? Write the wavelengths Aa, Ag and Ac of emission of light A,> A>A, in the
order of longest to the shortest in terms of Aa, Ag and Ac.
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