Selectively enhanced band gap emission in ZnO/Ag_2O nanocomposites | Zendy

Tzung-Hsuan Lin | Zendy; Tung-Te Chen | Zendy; Chung-Liang Cheng | Zendy; Hsia Yu Lin | Zendy; YangFang Chen | Zendy

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Selectively enhanced band gap emission in ZnO/Ag_2O nanocomposites

Author(s) -

Tzung-Hsuan Lin,

Tung-Te Chen,

Chung-Liang Cheng,

Hsia Yu Lin,

YangFang Chen

Publication year - 2009

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.17.004342

Subject(s) - nanorod , materials science , nanocomposite , band gap , semiconductor , optoelectronics , wide bandgap semiconductor , nanoparticle , composite number , direct and indirect band gaps , nanotechnology , visible spectrum , optics , composite material , physics

A new composite consisting of ZnO nanorods decorated with Ag(2)O nanoparticles has been synthesized and characterized. It is found that the band gap emission of ZnO nanorods can be greatly enhanced by about 10 times, while the defect emission can be suppressed to the detection limit, simultaneously. The ratio between the band gap and defect emission reaches to an enhanced factor of about 600 times. The underlying mechanism is attributed to the combined effects of surface modification, band alignment, as well as charge transfer. Our approach provided here can be extended to many other semiconductors for creating nanocomposites with novel optical properties.

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