The investigation of electrodeposited Cu2O/ITO layers by chronocoulometry process: effect of electrical potential


Mohra D., Benhaliliba M., Serin M. , Khelladi M. R. , Lahmar H., Azizi A.

JOURNAL OF SEMICONDUCTORS, cilt.37, 2016 (ESCI İndekslerine Giren Dergi) identifier identifier

Özet

The thin films of Cu2O are deposited by electrodeposition technique onto indium tin oxide (ITO)-coated glass substrate at different potentials. The precursor is an aqueous solution which contains respectively 0.05 M of CuSO4 and citric acid at kept temperature of 60 degrees C and the applied potential varies within the {-0: 4 V, -0: 7 V} SCE range. Based on the chronocoulometry (CC) process, the electrochemical, structural and optical parameters are determined. We measured the current as function of potential within the {-0.4 V, -0.7 V} range and the higher current is found to be within the {-0.7 V, -0.3 V} band. The grain sizes are of 12.12 nm and 35.47 nm according to (110) and (221) orientations respectively. The high textural coefficient of 0.943 is recorded for the potential -0.7 V. The transmittance of 72.25 %, within the visible band, is obtained for the as-grown layer at -0.4 V and the band gap is found to be 2.2 eV for the electrodeposition potential of -0.7 V.