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Journal of Applied Physics / Volume 98 / Issue 8 / STRUCTURAL, MECHANICAL, THERMODYNAMIC, AND OPTICAL PROPERTIES OF CONDENSED MATTER

J. Appl. Phys. 98, 083507 (2005); http://dx.doi.org/10.1063/1.2102069 (6 pages)

Energy transfer between Co2+ and Fe2+ ions in diffusion-doped ZnSe

Ming Luo1, N. C. Giles1, Utpal N. Roy2, Yunlong Cui2, and Arnold Burger2

1Physics Department, West Virginia University, Morgantown, West Virginia 26506
2Physics Department, Fisk University, Nashville, Tennessee 37208-3051

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(Received 29 July 2005; accepted 1 September 2005; published online 19 October 2005)

Absorption, photoluminescence (PL), and time-resolved PL measurements were applied to samples of polycrystalline ZnSe which were diffusion doped with iron or with cobalt or codoped with both iron and cobalt. Characteristic emission and absorption features due to Co2+ and Fe2+ were observed in the visible and infrared regions. In the spectral region near 3 μm, a Co2+ emission overlaps completely with an Fe2+ absorption and energy transfer occurs. Using PL lifetime data, a decrease in the Co2+ lifetime of ∼ 300 μs to less than 100 μs was observed. This decrease in lifetime indicates that the nature of the energy-transfer process is nonradiative. The energy-transfer rate decreases with temperature, as expected for the nonradiative electric dipole-dipole interaction. The temperature dependences of both Co2+ and Fe2+ emissions are described.

© 2005 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. EXPERIMENTAL DETAILS
  3. RESULTS AND DISCUSSION
  4. SUMMARY

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KEYWORDS and PACS

Keywords

zinc compounds, cobalt, iron, II-VI semiconductors, semiconductor doping, diffusion, visible spectra, infrared spectra, photoluminescence, time resolved spectra

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2102069

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

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

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    References

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