Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
847539 | Optik - International Journal for Light and Electron Optics | 2016 | 11 Pages |
The highly transparent conducting cadmium oxide (CdO) films were prepared by jet nebulizer spray pyrolysis. Characterization and optimization of CdO films have been scrutinized using various techniques such as X-ray diffraction (XRD) pattern, scanning electron microscope (SEM), energy dispersive analysis by X-ray (EDAX) spectroscopy, Atomic force microscopy (AFM), ultraviolet visible (UV-Vis) spectroscopy, hall Effect and current–voltage (I–V) characteristics. The sample prepared at 400 °C with 4 ml and 0.20 M of volume and concentration of the precursor solution respectively have the transmittance of about 70% with a band gap of 2.37 eV and the resistivity was found to be a minimum of 3.38 × 10−3 Ω cm. The XRD, SEM and AFM studies have implied the presence of CdO nanocrystallites with cubic structure and having smooth surface. The short circuit current (Isc) = 5.90 mA/cm2 and open circuit volatge (Voc) = 429.3 mV values were established to be the maximum for the cell made with CdO films at 400 °C. The fill factor (FF) = 0.32 and conversion efficiency η = 0.8% was also maximum for this solar cell. The low fill factor and efficiency might be due to the formation of excess silicon dioxide (SiO2) at the CdO/p-Si interface due to reaction between CdO and Si at 400 °C.