Abstract
In this work we present the fabrication & characterization of hybrid bilayer photodiode based on aligned zinc oxide (ZnO) nanorods and poly(3-hexylthiophene) (P3HT). These functional hybrid bi-layered photodiodes showed excellent diode characteristics & were found to have a high rectification ratio under dark conditions & demonstrated enhanced responsivity under illumination. It was observed that highly anisotropic growth of ZnO occurred with the addition of KMnO4 resulting in oriented growth of ZnO nanorod arrays. Further the effect of in situ addition of KMnO4 on ZnO/P3HT photodiode. Further we studied the effect of ZnO grown for various KMnO4 concentrations on ZnO/P3HT photodiode. The results indicate that the increased surface area of contact between the ZnO nanorods & the P3HT, & reduction in defect states of ZnO led to the better responsivity of photodiode.
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