Investigation of Photoconductivity in Cadmium Sulfide
| dc.contributor.author | Asfaw, Letemeskel | |
| dc.date.accessioned | 2018-06-28T08:13:31Z | |
| dc.date.accessioned | 2023-11-09T11:23:51Z | |
| dc.date.available | 2018-06-28T08:13:31Z | |
| dc.date.available | 2023-11-09T11:23:51Z | |
| dc.date.issued | 1984-06 | |
| dc.description.abstract | In this thesis the photoconductivity of polycrystalline cadmium sulfide was investigated theoretically and experimentally. The theory shows that both a change in carrier conent~ ration and mobility can contribute to the variation in conduc~" tivity under illumination depending on the doping level, trap concentration and light intensity. Thin-film polycrystalline layers of CdS were prepared by the chemical bath deposition technique. Doping with lithium was possible. X-ray investigation of the layers indicated that the layers are made up of very small crystallites. Annealing enhanced recrystallization increasing the crystallite dimension. Besides polycrystalline CdS, monocrystalline and pressed CdS were used for photoconductivity measurements. The annealed layers showed a spectral photoresponse similar to the monocrystalline CdS with an absorption edge at 2.4e'1. In order to measure the lifetime of the charge carriers, the photoconductive decay process was used. The lifetime was found to have a spectral dependence | en_US |
| dc.identifier.uri | http://10.90.10.223:4000/handle/123456789/4523 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa University | en_US |
| dc.subject | Investigation of Photoconductivity | en_US |
| dc.title | Investigation of Photoconductivity in Cadmium Sulfide | en_US |
| dc.type | Thesis | en_US |