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Photoluminescence Spectra of Zn1-xCdxAl2Se4 Single Crystals

Published online by Cambridge University Press:  31 January 2011

Seung-Cheol Hyun ,
Chang-Dae Kim ,
Tae-Young Park ,
Hyung-Gon Kim ,
Moon-Seog Jin ,
Choong-Il Lee ,
Jae-Mo Goh  and
Wha-Tek Kim
Seung-Cheol Hyun
Affiliation:
Department of Physics, Mokpo National University, Mokpo 534–729, Korea
Chang-Dae Kim
Affiliation:
Department of Physics, Mokpo National University, Mokpo 534–729, Korea
Tae-Young Park
Affiliation:
Department of Physics, Wonkwang University, Iri 570–749, Korea
Hyung-Gon Kim
Affiliation:
Department of Electrical Engineering, Chosun University Technical Junior College, Kwangju 501–759, Korea
Moon-Seog Jin
Affiliation:
Department of Physics, Dongshin University, Naju 520–714, Korea
Choong-Il Lee
Affiliation:
Department of Physics, Suncheon National University, Suncheon 540–742, Korea
Jae-Mo Goh
Affiliation:
Department of Physics, Chonnam National University, Kwangju 500–757, Korea
Wha-Tek Kim
Affiliation:
Department of Physics, Chonnam National University, Kwangju 500–757, Korea
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Abstract

We investigated the photoluminescence spectra as well as the crystal structure and optical energy gaps of the Zn1-xCdxAl2Se4 single crystals grown by the chemical transport reaction method. It was shown from the analysis of the observed x-ray diffraction patterns that these crystals have a defect chalcopyrite structure for a whole composition. The lattice constant a increases from 5.5561 A for x = 0.0 (ZnAl2Se4) to 5.6361 A for x = 1.0 (CdAl2Se4) with increasing x, whereas the lattice constant c decreases from 10.8890 A for x = 0.0 to 10.7194 A for x = 1.0. The optical energy gaps at 13 K were found to range from 3.082 eV (x = 1.0) to 3.525 eV (x = 0.0). The temperature dependence of the optical energy gaps was well fitted with the Varshni equation. We observed two emission bands consisting of a strong blue emission band and a weak broad emission band due to donor–acceptor pair recombination in the Zn1-xCdxAl2Se4 for 0.0 ⩽ x ⩽ 1.0. These emission bands showed a red shift with increasing x. The energy band scheme for the radiative mechanism of the Zn1-xCdxAl2Se4 was proposed on the basis of the photoluminescence thermal quenching analysis along with the measurements of photo-induced current transient spectroscopy. The proposed energy band model permits us to assign the observed emission bands.

Type
Articles
Information
Journal of Materials Research , Volume 15 , Issue 4 , April 2000 , pp. 880 - 883
Copyright
Copyright © Materials Research Society 2000

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References

REFERENCES

1.Hahn, H., Frank, G., Klingler, W., Storger, A.D., and Storger, G., Z. Anorg. Allg. Chem. 279, 241 (1955).CrossRefGoogle Scholar
2.Range, K.J., Becker, W., and Weiss, A., Naturforsch., Z., B.: Chem. Sci. 23B, 1009 (1968).Google Scholar
3.Krauss, G., Krämer, V., Eifler, A., Riede, V., and Wenger, S., Cryst. Res. Technol. 32, 223 (1997).CrossRefGoogle Scholar
4.Hecht, J-D., Eifler, A., Riede, V., Schubert, M., Krauss, G. and Krämer, V., Phys. Rev. B 57, 7037 (1998).CrossRefGoogle Scholar
5.Park, T.Y., Kim, C.D., Yoon, C.S., Yang, D.I., Song, H.J. and Kim, W.T., J. Phys. Chem. Solids 59, 645 (1998).CrossRefGoogle Scholar
6.Paorici, C., Zanotti, L., and Zuccalli, G., J. Cryst. Growth 43, 705 (1978).CrossRefGoogle Scholar
7.Varshni, Y.P., Physica 34, 149 (1967).CrossRefGoogle Scholar
8.Song, H.J., Yun, S.H., and Kim, W.T., Solid State Commun. 94, 225 (1995).CrossRefGoogle Scholar