期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 42, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/42/3/035502
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Polyvinyl pyrrolidone (PVP) capped cadmium selenide (CdSe) nanoparticles embedded in polyvinyl alcohol (PVA) matrix are reported. PVP-CdSe nanoparticles are prepared by a non-aqueous method wherein cadmium chloride is used as the cadmium source and sodium selenate as the selenium source. The nanocomposites are characterized by x-ray diffraction (XRD) and transmission electron microscopy (TEM) studies. XRD and TEM studies show the formation of cubic CdSe particles with an average size of 2.3 +/- 0.2 nm. The synthesized nanoparticles are dispersed in the PVA matrix and cast as self-standing flexible (PVP-CdSe)-PVA films. These films are characterized by optical absorption spectroscopy, by which optical band energy gaps as well as the average particle size of CdSe nanoparticles were calculated. The I-V characteristic curve of the (PVP-CdSe)-PVA film shows a photovoltaic cell-like behaviour. The electromotive force generated from the (PVP-CdSe)-PVA film as a function of light intensity was also studied.
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