| Abstrakt: |
Inorganic thin-film photovoltaic (PV) cells have been fabricated using the n-type cadmium sulfide (CdS) window and p-type cadmium telluride (CdTe) absorber layers. This work combines significant literature with new results from a research programme including electroplated and chemical bath deposited CdTe and CdS, respectively. The structural, morphological, optical, and electrical properties of the CdTe/CdS layers have been studied through X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence (PL), high-resolution transmission electron microscope (HRTEM), and UV–Visible spectroscopy. The XRD results confirm the cubic crystalline structure of CdS and CdTe layers. The band-gap values of the CdS and CdTe layers are estimated from absorption spectra and corresponding Tauc's plot as 2.35 eV and 1.51 eV, respectively. The optical performance in terms of transmittance and PL spectra suggests that these films are suitable for photovoltaic (PV) applications. The results of HRTEM study confirm that CdS/CdTe particles are in circular shape with seed size (~3.2 nm). The lattice spacing between the nanocrystals is approximately 0.30 nm along with a diameter around 3.2 nm. A FE-SEM cross-section image shows a CdTe layer with thickness ~1.1 μm. To study the PV parameters of the fabricated CdTe/CdS cell, the current-voltage (J–V) characteristic curve is plotted. The efficiency of the PV cell is calculated to be 9.80%. Finally, the possibility to carry out the work with low-cost materials that are columnar in nature is discussed. [ABSTRACT FROM AUTHOR] |
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