Preparation and characterizations of CuInSe2 thin films by spin-coating method using the nanoparticles of CuInSe2

CuInSe₂ (CIS) thin films prepared on quartz substrates by the spin-coating method using the nanoparticles of CIS have been investigated by X-ray diffraction, scanning electron microscope, energy dispersive X-ray analysis. The chemical composition of CIS thin films sintered in N₂ atmosphere was Se/metal(Cu+In) = 0.55 or 0.58, indicating a deficiency of selenium. However, CIS thin films sintered in atmosphere of N₂ including Se vapor were improved Se/metal molar ratio. It can be seen that the improvement of crystallinity of CIS thin films using the nanoparticles of CIS were relatively effective for the sintering time and the sintering Se vapor.