Quantum Dots-量子点 CB As particle Small size Cd;P2(Eg:~3.0ev): No visible light absorbed. gets smaller, VB the band gap gets bigger. Semiconductor Q-Cd3P2 Big size Cd;P2(E:0.5 ev):absorb all wavelength of visible light.Quantum Dots -量子点 Small size Cd3P2 ( Eg: ~ 3.0 eV): No visible light absorbed. As particle gets smaller, the band gap gets bigger. Big size Cd3P2 (Eg: 0.5 eV): absorb all wavelength of visible light