Abstract
The effect of ethanol to methanol volume ratio on the optical and structural properties of diamond- like carbon DLC film deposited by electrodeposition technique was investigated. The deposition rate was found to be decreased with increasing the methanol to ethanol volume ratio. Raman results confirmed that the maximum value of ID/IG ratio was obtained for DLC film electrodeposited with 90% (v/v) methanol and 10% (v/v) ethanol. The optical data revealed that the optical energy gap of DLC film increases as ethanol to methanol ratio increase. The DLC film prepared with 80% methanol and 20% ethanol (M80E20) exhibited minimum optical reflectance and the refractive index of DLC film was measured and found to be in the range (1.49–2.12) at 500 nm depending on the ethanol to methanol ratio. The conversion efficiency η of silicon solar cell has increased from 3.08% to 3.89% after depositing the DLC film deposited at 80% (v/v) methanol and 20% (v/v) ethanol condition.
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