Synthesis of CdTe Thin Films for Solar Cell using Solution-based Deposition Methods at Low Temperature

Polycrystalline CdTe thin films for solar cells were deposited on glass substrates using a continuous flow microreactor (CFM) and a modified spray process at low temperature. Their cubic structures were identified by X-ray diffraction (XRD) measurements. Their chemical binding information was investigated with the aid of X-ray photoelectron spectroscope. Scanning electron microscopy (SEM) was employed to examine the films' surface morphologies. Average particle sizes were found by transmission electron microscopy (TEM) to be larger in the spray-deposited film than the microreactor-deposited film. The estimated optical band gap values in UV-vis spectrophotometer were similar to 1.57 eV for both films prepared by CFM and spray methods.