Rosario, SR and Kulandaisamy, I and Kumar, KDA and Ramesh, K and Ibrahium, HA and Awwad, NS (2020) Ag-doped PbS thin films by nebulizer spray pyrolysis for solar cells. In: International Journal of Energy Research, 44 (6). pp. 4505-4515.
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Abstract
Silver (Ag)-doped PbS (PbS:Ag) thin films of 616 to 745 nm in thickness were prepared on glass substrates via cost-effective nebulizer spray method by adding different Ag levels from 2% to 8% at 200°C. For solar cell applications, the effect of Ag doping concentration on structural, morphological, optical, photoluminescence, and electrical chattels of PbS thin film has been studied. X-ray diffraction pattern confirmed the polycrystalline behavior of the prepared PbS:Ag films with cubic crystalline nature. The crystalline size and texture coefficient were increased by increasing Ag doping concentration. From the morphological studies by scanning electron microscope (SEM) and atomic force microscope (AFM), the grain size of the films and surface roughness values were increased for the increase in Ag doping concentration. EDS spectra confirmed the existence of Ag, Pb, and S elements in the select 6% Ag-doped PbS film. Peaks related to silver oxide started to emerge at 6% of Ag doping level. The optical direct band gap value was reduced from 1.51 to 1.17 eV for Ag doping from 2% to 6% and thereby slightly increased as 1.79 eV for 8% Ag doping level. For all PbS:Ag films, the photoluminescence spectrum emitted a strong near band edge (NBE) emission at approximately 580 nm, meaning better optical quality. Hall effect measurements evidenced that Ag doping provides enhancement on the characteristics of mobility, carrier concentration, and resistivity with p-type conducting nature. The observed high carrier concentration and low resistivity values were 4.32 × 1014 cm−3 and 80 Ωcm, for 6% Ag-doped PbS film. The FTO/CdS/PbS:Ag heterostructure solar cell was formed from 6% Ag-doped film.
| Item Type: | Journal Article |
|---|---|
| Publication: | International Journal of Energy Research |
| Publisher: | John Wiley and Sons Ltd |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Keywords: | Cadmium compounds; Carrier concentration; Cost effectiveness; Energy gap; Film preparation; Hall effect; Hall mobility; IV-VI semiconductors; Lead compounds; Photoluminescence; Photoluminescence spectroscopy; Scanning electron microscopy; Semiconductor doping; Silver oxides; Solar cells; Spray pyrolysis; Substrates; Surface roughness; Textures, Cubic crystalline; Hall effect measurement; Morphological study; Near band edge emissions; Optical qualities; Photoluminescence spectrum; Solar-cell applications; Texture coefficient, Thin films |
| Department/Centre: | Division of Physical & Mathematical Sciences > Physics |
| Date Deposited: | 06 Feb 2023 09:26 |
| Last Modified: | 06 Feb 2023 09:26 |
| URI: | https://eprints.iisc.ac.in/id/eprint/79911 |
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