What Is The Relationship Between The Band Gap And Photoluminescence Of CdSe Nanoparticles?

The relationship between the band gap and photoluminescence of CdSe nanoparticles is such that a smaller band gap leads to a longer wavelength and lower energy emission, resulting in red-shifted photoluminescence. This is due to quantum confinement effects, where the size of the nanoparticle affects the electronic structure and results in discrete energy levels. As the size of the nanoparticle decreases, the electronic structure becomes more confined, leading to a larger bandgap and higher energy emissions. Therefore, controlling the size of CdSe nanoparticles can be used to tune their photoluminescence properties for various applications.