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Observation of persistent photoconductivity in flower shaped PbS dendrite structures

Pendyala, Naresh Babu and Rao, KSR Koteswara (2009) Observation of persistent photoconductivity in flower shaped PbS dendrite structures. In: Solid State Communications, 149 (43-44). pp. 1928-1931.

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We report the observation of persistent photoconductivity (PPC) in flower shaped PbS dendrites grown by the hydrothermal method. Potential fluctuations, due to the presence of various confinement regimes in the branches of dendrites, and surface traps, are likely responsible for the PPC observed here. We also observed photocurrent quenching and decreased dark current in the PPC below 40 K, due to the presence of a metastable state, whereas positive PPC was observed in the temperature region 40-220 K. Dark conductivity measurements, time constant parameters obtained from the stretched exponential fittings of PPC, also showed the metastable state related transition around 50 K.

Item Type: Journal Article
Publication: Solid State Communications
Publisher: Elsevier Science
Additional Information: Copyright for this article belongs to Elsevier Science.
Keywords: Nanostructures; Surfaces and interfaces; Chemical synthesis; Photoconductivity
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 12 Jan 2010 09:08
Last Modified: 19 Sep 2010 05:54
URI: http://eprints.iisc.ac.in/id/eprint/25352

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