On characteristics of PVA/CdS and PVA/CdS:Cu nanocomposites for applications as LED

► We synthesized CdS and CdS:Cu nanocrystals by chemical route method. ► PL and EL are found in the same position. ► Emission is only for CdS and CdS:Cu nanocrystals. ► Quantum efficiency is more in doped nanocrystals. ► We achieve low operating and low saturation voltages in case of doped nanocrystals without losing efficiency.