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EDTA-assisted hydrothermal synthesis of FeS2/NiSe2 nanocomposites and the optical and electrical properties of their thin films

Wu Rong Zheng Yu-Feng Sun Yan-Fei Xu Jin-Bao Zhang Xiao-Gang

EDTA-assisted hydrothermal synthesis of FeS2/NiSe2 nanocomposites and the optical and electrical properties of their thin films

Wu Rong, Zheng Yu-Feng, Sun Yan-Fei, Xu Jin-Bao, Zhang Xiao-Gang
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  • Received Date:  02 February 2004
  • Accepted Date:  01 March 2004
  • Published Online:  05 May 2004

EDTA-assisted hydrothermal synthesis of FeS2/NiSe2 nanocomposites and the optical and electrical properties of their thin films

  • 1. (1)新疆大学物理系材料实验室,乌鲁木齐 830046; (2)新疆大学应用化学研究所,乌鲁木齐 830046

Abstract: Nonacomposites of NiSe2was successfully synthesized by EDTAassisted hydrothe rm al method, adding NiSe2 with MX2 structure as seed. X_ray diffraction pa tterns indicate that the products are single phase FeS2(pyrite) with the average grain size of about 48nm. FeS2thin films were prepared by screen_printing method and annealed at high temperature. It has been shown that they have an increased direct bandgap. With increasing amount of seed, the absorbance edges in the ultraviolet_visible range show a red shift; the resistance goes up; Hall mobility rises and the carrier c oncentration decreases. The FeS2thin film shows an n_type semiconductor chara cteristic. The mechanism of the formation of FeS2(pyrite) nanocrystalline was discussed in terms of the growth process.

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