Contactless electroreflectance study of band bending in Be-doped GaInNAs/GaAs quantum wells

The origin of photoluminescence enhancement

R. Kudrawiec (Corresponding Author), M. Gladysiewicz, J. Misiewicz, V.-M. Korpijärvi, Janne Pakarinen, J. Puustinen, P. Laukkanen, A. Laakso, M. Guina, M. Dumitrescu, M. Pessa

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

Contactless electroreflectance (CER) has been applied to study band bending in Be-doped GaInNAs/GaAs quantum wells (QWs). It has been shown that (i) the sign of GaAs-related CER signal changes from positive to negative due to Be-doping and (ii) QW-related CER resonances disappear for Be-doped QWs whereas they are clearly observed for un-doped QWs. The two observations indicate a Be-related shift in the Fermi level above the hole levels in the QW region, i.e., the change in band bending in this system. The results point out that the experimentally-observed enhancement in QW photoluminescence upon Be-doping is associated with a better collection/confinement of photogenerated carriers by the Be-doped GaInNAs QW.
Original languageEnglish
Article number021902
Number of pages3
JournalApplied Physics Letters
Volume97
Issue number2
DOIs
Publication statusPublished - 2010
MoE publication typeA1 Journal article-refereed

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quantum wells
photoluminescence
augmentation
shift

Keywords

  • electroreflectance
  • CER
  • quantum wells
  • QW
  • GaAs
  • GaInNAs

Cite this

Kudrawiec, R., Gladysiewicz, M., Misiewicz, J., Korpijärvi, V-M., Pakarinen, J., Puustinen, J., ... Pessa, M. (2010). Contactless electroreflectance study of band bending in Be-doped GaInNAs/GaAs quantum wells: The origin of photoluminescence enhancement. Applied Physics Letters, 97(2), [021902]. https://doi.org/10.1063/1.3462299
Kudrawiec, R. ; Gladysiewicz, M. ; Misiewicz, J. ; Korpijärvi, V.-M. ; Pakarinen, Janne ; Puustinen, J. ; Laukkanen, P. ; Laakso, A. ; Guina, M. ; Dumitrescu, M. ; Pessa, M. / Contactless electroreflectance study of band bending in Be-doped GaInNAs/GaAs quantum wells : The origin of photoluminescence enhancement. In: Applied Physics Letters. 2010 ; Vol. 97, No. 2.
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abstract = "Contactless electroreflectance (CER) has been applied to study band bending in Be-doped GaInNAs/GaAs quantum wells (QWs). It has been shown that (i) the sign of GaAs-related CER signal changes from positive to negative due to Be-doping and (ii) QW-related CER resonances disappear for Be-doped QWs whereas they are clearly observed for un-doped QWs. The two observations indicate a Be-related shift in the Fermi level above the hole levels in the QW region, i.e., the change in band bending in this system. The results point out that the experimentally-observed enhancement in QW photoluminescence upon Be-doping is associated with a better collection/confinement of photogenerated carriers by the Be-doped GaInNAs QW.",
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Kudrawiec, R, Gladysiewicz, M, Misiewicz, J, Korpijärvi, V-M, Pakarinen, J, Puustinen, J, Laukkanen, P, Laakso, A, Guina, M, Dumitrescu, M & Pessa, M 2010, 'Contactless electroreflectance study of band bending in Be-doped GaInNAs/GaAs quantum wells: The origin of photoluminescence enhancement', Applied Physics Letters, vol. 97, no. 2, 021902. https://doi.org/10.1063/1.3462299

Contactless electroreflectance study of band bending in Be-doped GaInNAs/GaAs quantum wells : The origin of photoluminescence enhancement. / Kudrawiec, R. (Corresponding Author); Gladysiewicz, M.; Misiewicz, J.; Korpijärvi, V.-M.; Pakarinen, Janne; Puustinen, J.; Laukkanen, P.; Laakso, A.; Guina, M.; Dumitrescu, M.; Pessa, M.

In: Applied Physics Letters, Vol. 97, No. 2, 021902, 2010.

Research output: Contribution to journalArticleScientificpeer-review

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T2 - The origin of photoluminescence enhancement

AU - Kudrawiec, R.

AU - Gladysiewicz, M.

AU - Misiewicz, J.

AU - Korpijärvi, V.-M.

AU - Pakarinen, Janne

AU - Puustinen, J.

AU - Laukkanen, P.

AU - Laakso, A.

AU - Guina, M.

AU - Dumitrescu, M.

AU - Pessa, M.

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AB - Contactless electroreflectance (CER) has been applied to study band bending in Be-doped GaInNAs/GaAs quantum wells (QWs). It has been shown that (i) the sign of GaAs-related CER signal changes from positive to negative due to Be-doping and (ii) QW-related CER resonances disappear for Be-doped QWs whereas they are clearly observed for un-doped QWs. The two observations indicate a Be-related shift in the Fermi level above the hole levels in the QW region, i.e., the change in band bending in this system. The results point out that the experimentally-observed enhancement in QW photoluminescence upon Be-doping is associated with a better collection/confinement of photogenerated carriers by the Be-doped GaInNAs QW.

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