Question

GO FIGURE As the size of the quantum dots decreases, does the wavelength of the emitted light increase or decrease? Size of CdSe quantum dots 2 nm →7 nm 2.7 eV 2.0 eV Band gap energy, Eg A FIGURE 12.44 Photoluminescence. 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 light emitted depends on the size of the CdSe nanoparticles.

Answer 1

As the size of the quantum dots decreases , the wavelength emitted also shortens and move towards blue end of the visual.