In this study, we report an efficient CdTe-SnO_2 quantum dot(QD) solar cell fabricated by heat-assisted drop-casting of hydrothermally synthesized CdTe QDs on electrospun SnO_2 nanofibers. The as-prepared QDs and SnO_...In this study, we report an efficient CdTe-SnO_2 quantum dot(QD) solar cell fabricated by heat-assisted drop-casting of hydrothermally synthesized CdTe QDs on electrospun SnO_2 nanofibers. The as-prepared QDs and SnO_2 nanofibers were characterized by dynamic light scattering(DLS), UV–Vis spectroscopy,photoluminescence(PL) spectra, X-ray diffraction(XRD) and transmission electron microscopy(TEM). The SnO_2 nanofibers deposited on fluorine-doped tin oxide(SnO_2) and sensitized with the CdTe QDs were assembled into a solar cell by sandwiching against a platinum(Pt) counter electrode in presence of cobalt electrolyte. The efficiency of cells was investigated by anchoring QDs of varying sizes on SnO_2. The best photovoltaic performance of an overall power conversion efficiency of 1.10%, an open-circuit voltage(Voc)of 0.80 V, and a photocurrent density(JSC) of 3.70 m A/cm^2 were obtained for cells with SnO_2 thickness of5–6 μm and cell area of 0.25 cm^2 under standard 1 Sun illumination(100 m W/cm^2). The efficiency was investigated for the same systems under polysulfide electrolyte as well for a comparison.展开更多
基金supported by Solar Energy Research Initiative(SERI)of Department of Science and Technology(DST),Govt.of India
文摘In this study, we report an efficient CdTe-SnO_2 quantum dot(QD) solar cell fabricated by heat-assisted drop-casting of hydrothermally synthesized CdTe QDs on electrospun SnO_2 nanofibers. The as-prepared QDs and SnO_2 nanofibers were characterized by dynamic light scattering(DLS), UV–Vis spectroscopy,photoluminescence(PL) spectra, X-ray diffraction(XRD) and transmission electron microscopy(TEM). The SnO_2 nanofibers deposited on fluorine-doped tin oxide(SnO_2) and sensitized with the CdTe QDs were assembled into a solar cell by sandwiching against a platinum(Pt) counter electrode in presence of cobalt electrolyte. The efficiency of cells was investigated by anchoring QDs of varying sizes on SnO_2. The best photovoltaic performance of an overall power conversion efficiency of 1.10%, an open-circuit voltage(Voc)of 0.80 V, and a photocurrent density(JSC) of 3.70 m A/cm^2 were obtained for cells with SnO_2 thickness of5–6 μm and cell area of 0.25 cm^2 under standard 1 Sun illumination(100 m W/cm^2). The efficiency was investigated for the same systems under polysulfide electrolyte as well for a comparison.
