Abstract
This research presents the effect of different concentrations of iron (Fe) as dopants on the physical properties of the copper selenide (Cu3Se2) nanoparticle (NPs). The physical properties of the Cu3Se2 NPs were investigated using structural, morphological, and optical analysis. The results revealed that the Fe concentrations change the crystallite size (from ∼8 to 44 nm) and strain (from ∼0.0007 to 0.0030). Fe-doped Cu3Se2 NPs showed a higher optical energy band gap in comparison to the un-doped sample (1.80 eV). The films prepared by green binder (ethyl cellulose) indicated that the sample with minimum Fe concentration presents the highest carrier concentration (9.56e+18 cm−3) and lowest ideality factor (2.02) amounts. The electrical study shows space charge limited current (SCLC) mechanism in Fe-doped Cu3Se2 NPs that is not observed in un-doped sample. Using this mechanism, the highest carrier mobility (16.22 cm+2V−1s−1) obtained for sample with the lowest amount of Fe concentrations.
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