Charge transport mechanism in lead oxide revealed by CELIV technique
Although polycrystalline lead oxide (PbO) belongs to the most promising photoconductors for optoelectronic and large area detectors applications, the charge transport mechanism in this material still remains unclear. Combining the conventional time-of-flight and the photo-generated charge extraction...
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| Veröffentlicht in: | Scientific reports 2016-09, Vol.6 (1), p.33359-33359, Article 33359 |
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| creator | Semeniuk, O. Juska, G. Oelerich, J.-O. Wiemer, M. Baranovskii, S. D. Reznik, A. |
| description | Although polycrystalline lead oxide (PbO) belongs to the most promising photoconductors for optoelectronic and large area detectors applications, the charge transport mechanism in this material still remains unclear. Combining the conventional time-of-flight and the photo-generated charge extraction by linear increasing voltage (photo-CELIV) techniques, we investigate the transport of holes which are shown to be the faster carriers in poly-PbO. Experimentally measured temperature and electric field dependences of the hole mobility suggest a highly dispersive transport. In order to analyze the transport features quantitatively, the theory of the photo-CELIV is extended to account for the dispersive nature of charge transport. While in other materials with dispersive transport the amount of dispersion usually depends on temperature, this is not the case in poly-PbO, which evidences that dispersive transport is caused by the spatial inhomogeneity of the material and not by the energy disorder. |
| doi_str_mv | 10.1038/srep33359 |
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| subjects | 639/301/1005/1007 639/766/1130/2799 Crystals Humanities and Social Sciences multidisciplinary Science Temperature effects |
| title | Charge transport mechanism in lead oxide revealed by CELIV technique |
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