Magnesium acceptor levels in GaN studied by photoluminescence

A. Kasi Viswanath, Eun Joo Shin, Joo In Lee, Sungkyu Yu, Dongho Kim, Baeyong Kim, Yoonho Choi, Chang Hee Hong

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Abstract

Magnesium doped GaN epitaxial layers were grown by metal-organic chemical vapor deposition on sapphire substrate. Energy levels of these acceptors were investigated by systematic photoluminescence measurements in the temperature range of 12-300 K. Magnesium concentration was varied from < 1 × 1019 to higher than 5 × 1019 cm-3. Photoluminescence measurements were made on the as-grown and annealed samples. We have observed various transitions related to donor to acceptor and their phonon replicas, conduction band to acceptors, and free excitons. Their dependence on temperature, concentration of the magnesium impurity and annealing conditions was discussed. In our study, two important observations were made. First, very deep level luminescence was not observed even in the highly magnesium doped as-grown samples. Second, free exciton transitions including valence band splittings were observed for the first time in the Mg-doped materials, demonstrating the high quality of the samples.

Original languageEnglish
Pages (from-to)2272-2275
Number of pages4
JournalJournal of Applied Physics
Volume83
Issue number4
DOIs
Publication statusPublished - 1998 Feb 15

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magnesium
photoluminescence
excitons
replicas
metalorganic chemical vapor deposition
conduction bands
sapphire
energy levels
luminescence
valence
impurities
annealing
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Viswanath, A. K., Shin, E. J., Lee, J. I., Yu, S., Kim, D., Kim, B., ... Hong, C. H. (1998). Magnesium acceptor levels in GaN studied by photoluminescence. Journal of Applied Physics, 83(4), 2272-2275. https://doi.org/10.1063/1.366985
Viswanath, A. Kasi ; Shin, Eun Joo ; Lee, Joo In ; Yu, Sungkyu ; Kim, Dongho ; Kim, Baeyong ; Choi, Yoonho ; Hong, Chang Hee. / Magnesium acceptor levels in GaN studied by photoluminescence. In: Journal of Applied Physics. 1998 ; Vol. 83, No. 4. pp. 2272-2275.
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Viswanath, AK, Shin, EJ, Lee, JI, Yu, S, Kim, D, Kim, B, Choi, Y & Hong, CH 1998, 'Magnesium acceptor levels in GaN studied by photoluminescence', Journal of Applied Physics, vol. 83, no. 4, pp. 2272-2275. https://doi.org/10.1063/1.366985

Magnesium acceptor levels in GaN studied by photoluminescence. / Viswanath, A. Kasi; Shin, Eun Joo; Lee, Joo In; Yu, Sungkyu; Kim, Dongho; Kim, Baeyong; Choi, Yoonho; Hong, Chang Hee.

In: Journal of Applied Physics, Vol. 83, No. 4, 15.02.1998, p. 2272-2275.

Research output: Contribution to journalArticle

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