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Applied Physics Letters / Volume 91 / Issue 19 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 91, 191111 (2007); http://dx.doi.org/10.1063/1.2807277 (3 pages)

Surface plasmon excitation via Au nanoparticles in n-CdSe/p-Si heterojunction diodes

R. B. Konda1, R. Mundle1, H. Mustafa1, O. Bamiduro1, A. K. Pradhan1, U. N. Roy2, Y. Cui2, and A. Burger2

1Center for Materials Research and Department of Engineering, Norfolk State University, 700 Park Avenue, Norfolk, Virginia 23504, USA
2Department of Physics, Fisk University, 1000, 17 Avenue North, Nashville, Tennessee 37208, USA

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(Received 5 October 2007; accepted 19 October 2007; published online 7 November 2007)

We report on the significant enhancement of photocurrent in pn heterojunction diode, consisting of n-CdSe/p-Si substrates, in situ deposited with Au nanoparticles on the surface by the pulsed-laser deposition technique. This is attributed due to the large enhancement in electromagnetic field that occurs in the vicinity of the metal surface, causing surface plasmons. The large enhancement in Raman and photoluminescence intensity was observed due to surface plasmon resonance. Our results suggest that the photodetectors, optoelectronic, such as high-performance thin-film solar cells, optical communication, and sensing devices, including bio- and molecular sensors, can be fabricated with improved functionality.

© 2007 American Institute of Physics

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KEYWORDS and PACS

Keywords

cadmium compounds, elemental semiconductors, gold, II-VI semiconductors, nanoelectronics, nanoparticles, photoconductivity, photoluminescence, p-i-n diodes, p-n heterojunctions, pulsed laser deposition, Raman spectra, silicon, surface plasmon resonance, wide band gap semiconductors

PACS

  • 85.30.Kk

    Junction diodes

  • 85.35.-p

    Nanoelectronic devices

  • 73.40.Lq

    Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions

  • 73.22.Lp

    Collective excitations

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2807277

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

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