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19 December, 01:45

When the nanocrystalline semiconductor samples provided in case study are irradiated with violet light, you should observe that different samples emit different colors of light. Explain how the trend in the observed emitted colors (from violet towards red) is related to a trend in the band gap energies of these samples.

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  1. 19 December, 02:10
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    Due to the different lattice arrangement of nanocrystalline semiconductors, they will be able to emit different colors of light.

    Explanation:

    An essential feature in nanocrystalline semiconductor samples is that they may not have the same or in some cases similar structures. This characteristic is due to the fact that nanocrystals do not grow equally, presenting different shapes. Nanocrystals with uneven shapes may absorb light of a certain wavelength, but due to their uneven characteristics, the light emitted may be of a different wavelength.
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