How Does The Band Gap Of CdSe Change With Temperature?

The band gap of CdSe decreases as the temperature increases. This can be attributed to the thermal expansion of the crystal lattice, which reduces the effective strength of the Coulombic interactions between the electrons and holes in the material. Additionally, thermal excitation of electrons across the band gap also contributes to the decrease in band gap with increasing temperature. The magnitude and rate of change of the band gap with temperature depend on factors such as the size and morphology of the CdSe nanoparticles or bulk material, as well as the presence of impurities or defects within the material.