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

Rong Wu | Zendy; Yufeng Zheng | Zendy; Xiaogang Zhang | Zendy; Yanfei Sun | Zendy; Xu Jinbao | Zendy

Open Access

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

Author(s) -

Rong Wu,

Yufeng Zheng,

Xiaogang Zhang,

Yanfei Sun,

Xu Jinbao

Publication year - 2004

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.53.3493

Subject(s) - materials science , nanocrystalline material , pyrite , hydrothermal circulation , band gap , grain size , nanocomposite , absorbance , thin film , semiconductor , chemical engineering , nanotechnology , optoelectronics , composite material , optics , metallurgy , engineering , physics

Nonacomposites of NiSe2was successfully synthesized by EDTAassisted 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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