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    Öğe
    SYNTHESIS OF CE-DOPED ZNS NANOPARTICLES BY CHEMICAL PRECIPITATION METHOD AND INVESTIGATION OF THEIR STRUCTURAL, OPTICAL AND PHOTOVOLTAIC PROPERTIES
    (Inst Materials Physics, 2018) Gunbat, M.; Horoz, S.; Sahin, O.; Ekinci, A.
    The synthesized Ce-doped ZnS nanoparticles by chemical precipitation method were dropped on TiO2 coated on FTO conductive glass substrates. The photovoltaic property of the obtained Ce-doped ZnS/TiO2/FTO structure was investigated by measuring current density (J) voltage (V) and incident photon to current efficiency (IPCE), respectively. Power conversion efficiency of nanoparticles was calculated using the recorded J-V curve. Thus, both IPCE and J-V measurements have been shown experimentally that Ce-doped ZnS nanoparticles can be used as promising sensitizers in photovoltaic applications. Morever, the structural, elemental and photovoltaic properties of Ce-doped nanoparticles were studied by x-ray diffraction (XRD), energy dispersive x-ray (EDX), optical absorption and photoluminescence (PL) measurements, respectively. The characterization results were discussed.
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    Öğe
    SYNTHESIS OF Mo-DOPED ZnS NANOPARTICLES AND INVESTIGATION OF THEIR STRUCTURAL, OPTICAL AND PHOTOVOLTAIC PROPERTIES
    (Virtual Inst Physics, 2018) Gunbat, M.; Horoz, S.; Sahin, O.; Ekinci, A.
    ZnS and molybdenum (Mo) doped ZnS nanoparticles were synthesized at room temperature by co-precipitation method without any capping agent. The crystal structures of the synthesized ZnS and Mo-doped ZnS nanoparticles were determined to be zinc blend by x-ray powder diffraction (XRD). The calculated average crystal sizes are 2.70 and 2.68 nm for ZnS and Mo-doped ZnS nanoparticles, respectively. As a result of optical absorption measurements, it was observed that Mo dopant affects the energy band gap value of ZnS nanoparticles. The band gap value for ZnS and Mo-doped ZnS nanoparticles was determined as 4.07 and 4.17 eV, respectively. EDX measurement indicated that elemental percentages of Zn, S and Mo in the Mo-doped ZnS nanoparticles are 48.91, 50.25 and 0.84, respectively. The photovoltaic properties of Mo-doped ZnS nanoparticles were investigated for the first time in this study. The photon-to-current conversion (IPCE) measurements were carried out for ZnS and Mo-doped ZnS nanoparticles to compare their IPCE (%) values. The obtained result provides a new way to improve performance of ZnS-based solar cell structure.