| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Temperature-Dependent Defect-Induced New Emission in ZnSe Crystal |
| SHU Shi-Wei, MA Guo-Hong |
| Department of Physics, Shanghai University, Shanghai 200444 |
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| Cite this article: |
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SHU Shi-Wei, MA Guo-Hong 2009 Chin. Phys. Lett. 26 047102 |
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Abstract The temperature-dependent photoluminescence behaviour of chemical vapour transport (CVT)-grown ZnSe crystal is investigated. A new emission band appears when temperature is reduced to 155K. It is shown that the new emission band is strongly related to defect emission peaked at around 2.1eV. The emergence of the new emission band is accompanied by decreasing emission intensity of free exciton, as well as redshift of defect emission with temperature decreases. The activated energy of the defect state is estimated to be 60.6meV, which is approximately equal to the energy difference between the new emission and the free exciton emission at 155K.
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| Keywords:
71.35.-y
78.20.-e
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Received: 04 September 2008
Published: 25 March 2009
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| PACS: |
71.35.-y
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(Excitons and related phenomena)
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78.20.-e
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(Optical properties of bulk materials and thin films)
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[1] Zhang X T, Liu Z, Ip K M, Leung Y P, Li Q and Hark S K2004 J. Appl. Phys. 95 5752
[2] Su C H, Feth S, Wang L J and Lehoczky S L 2001 J.Crystal Growth 224 32
[3] Liem N Q, Lee J I, Quang V X, Thanh D X, Kim D Son J S andNoh S K 2000 J. Crystal Growth 214--215 441
[4] Philipose U, Yang S, Xu T and Ruda H E 2007 Appl.Phys. Lett. 90 063103
[5] Rong F, Barry W A, Donegan J F and Watkins G D 1987 Phys. Rev. B 37 4329
[6] Yoneda K, Hishida Y, Toda T, Ishii H and Niina T 1984 Appl. Phys. Lett. 45 1300
[7] Giapis K P, Lu D C and Jensen K F 1989 Appl. Phys.Lett. 54 353
[8] Merz J L, Kukimoto H, Nassau K and Shiever J W 1972 Phys. Rev. B 6 545
[9] Wang S Z, Xie S W, Pang Q J, Zheng H, Xia Y X, Ji R B, WuY, He L, Zhu Z M, Li G H and Wang Z P 2000 J. Crystal Growth 220 548
[10] Iyer S, Hegde S, Abul-Fadl A, Bajaj K K and Mitchel W1993 Phys. Rev. B 47 1329
[11] Li H Y, Qi J W, An Z S, Sun Z R and Xu K W 2006 Chin. Phys. 15 2407 |
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