When a small amount of silver is added to zinc sulfide as an activator,the band gap of the resulting material is approximately 266 kJ/mol.If it were used as a light-emitting diode,what color of light would be emitted?

Question

Quizplus · Accepted Answer

The energy of a photon emitted by a semiconductor is related to the bandgap energy of the semiconductor material. A smaller bandgap, meaning less energy needed to excite an electron to a higher energy level, would correspond to a longer wavelength or lower energy of the emitted photon. According to the given bandgap of 266 kJ/mol, the color of light emitted would have a wavelength in the blue range, which corresponds to choice E.

When a Small Amount of Silver Is Added to Zinc