Size of CdSe quantum dots 2 nm 7 nm 2.7 eV 2.0 eV Band gap energy, Eg A Figure 12.45 Photoluminescence depends on particle size at the nanoscale. When illuminated with ultraviolet light, these solutions, each containing nanoparticles of the semiconductor CdSe, emit light that corresponds to their respective band gap energies. The wavelength of the light emitted depends on the size of the CdSe nanoparticles. Activate Windows
Size of CdSe quantum dots 2 nm 7 nm 2.7 eV 2.0 eV Band gap energy, Eg A Figure 12.45 Photoluminescence depends on particle size at the nanoscale. When illuminated with ultraviolet light, these solutions, each containing nanoparticles of the semiconductor CdSe, emit light that corresponds to their respective band gap energies. The wavelength of the light emitted depends on the size of the CdSe nanoparticles. Activate Windows
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Question
As the size of the quantum dots decreases, does the
wavelength of the emitted light increase or decrease?
Transcribed Image Text:Size of CdSe quantum dots
2 nm
7 nm
2.7 eV
2.0 eV
Band gap energy, Eg
A Figure 12.45 Photoluminescence depends on particle
size at the nanoscale. When illuminated with ultraviolet
light, these solutions, each containing nanoparticles of the
semiconductor CdSe, emit light that corresponds to their
respective band gap energies. The wavelength of the light
emitted depends on the size of the CdSe nanoparticles.
Activate Windows
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