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Optical properties of Ho3+-, Er3+-, and Tm3+-doped BaIn2S4 and BaIn2Se4 single crystals

Published online by Cambridge University Press:  31 January 2011

Sang-An Park ,
Mi-Yang Kim ,
Wha-Tek Kim ,
Moon-Seog Jin ,
Sung-Hyu Choe ,
Tae-Young Park ,
Kwang-Ho Park  and
Duck-Tae Kim
Sang-An Park
Affiliation:
Department of Ophthalmic Optics, Chodang University, Muan Chonnam 534–701, Republic of Korea
Mi-Yang Kim
Affiliation:
Department of Physics, Chonnam National University, and Kwangju Branch, Korea Basic Science Institute, Kwangju 500–757, Republic of Korea
Wha-Tek Kim
Affiliation:
Department of Physics, Chonnam National University, and Kwangju Branch, Korea Basic Science Institute, Kwangju 500–757, Republic of Korea
Moon-Seog Jin*
Affiliation:
Department of Physics, Dongshin University, Naju 520–714, Republic of Korea
Sung-Hyu Choe
Affiliation:
Department of Physics, Chosun University, Kwangju 501–759, Republic of Korea
Tae-Young Park
Affiliation:
Department of Physics, Wonkwang University, Iri 570–749, Republic of Korea
Kwang-Ho Park
Affiliation:
Department of Electronics, Dong-A Junior College, Youngam 526–870, Republic of Korea
Duck-Tae Kim
Affiliation:
Department of Electronics, Dong-A Junior College, Youngam 526–870, Republic of Korea
*
a)msjin@blue.dongshinu.ac.kr
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Abstract

BaIn2S4, BaIn2S4:Ho3+, BaIn2S4:Er3+, BaIn2S4:Tm3+, BaIn2Se4, BaIn2Se4:Ho3+, BaIn2Se4:Er3+, and BaIn2Se4:Tm3+ single crystals were grown by the chemical transport reaction method. The optical energy gap of the single crystals was found to be 3.057, 2.987, 2.967, 2.907, 2.625, 2.545, 2.515, and 2.415 eV, respectively, at 11 K. The temperature dependence of the optical energy gap was well fitted by the Varshni equation. Broad emission peaks were observed in the photoluminescence spectra of the single crystals. They were assigned to donor–acceptor pair recombination. Sharp emission peaks were observed in the doped single crystals. They were attributed to be due to radiation recombination between the Stark levels of the Ho3+, Er3+, and Tm3+ ions sited in C1 symmetry.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 8 , August 2002 , pp. 2147 - 2152
Copyright
Copyright © Materials Research Society 2002

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