Details

Autor(en) / Beteiligte

• Nazir, Adnan
• Toma, Andrea
• Shah, Nazar Abbas
• Panaro, Simone
• Butt, Sajid
• Sagar, Rizwan ur Rehman
• Raja, Waseem
• Rasool, Kamran
• Maqsood, Asghari

Titel

Effect of Ag doping on opto-electrical properties of CdS thin films for solar cell applications

Ist Teil von

• Journal of alloys and compounds, 2014-10, Vol.609, p.40-45

Ort / Verlag

Kidlington: Elsevier B.V

Erscheinungsjahr

2014

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• •Polycrystalline CdS thin films are fabricated by means of Close Spaced Sublimation technique.•Ag is doped by simple ion-exchange technique in order to reduce resistivity of CdS thin films.•Remarkable reduction in resistivity without introducing many transparency losses. Cadmium sulfide (CdS) polycrystalline thin films of different thicknesses (ranging from 370nm to 750nm) were fabricated on corning glass substrates using Close Spaced Sublimation (CSS) technique. Optical and electrical investigation revealed that CdS thin films show an appreciable transparency (50–70% transmission) in visible range and a highly resistive behavior (106Ωcm). Samples were doped by silver (Ag) at different concentrations, using ion exchange technique, in order to reduce the resistivity of CdS thin films and to improve their efficiency as a window layer for solar cell application. The doping of Ag in pure CdS thin films resulted into an increase of surface roughness and a decrease both in electrical resistivity and in transparency. By optimizing annealing parameters, we were able to properly control the optical properties of the present system. In fact, the Ag doping of pure CdS films has led to a decrease of the sample resistivity by three orders of magnitude (103Ωcm) against a 20% cut in optical transmission.