Direct imaging of anisotropic minority-carrier diffusion in ordered GaInP

N. M. Haegel, T. J. Mills, M. Talmadge, C. Scandrett, C. L. Frenzen, H. Yoon, C. M. Fetzer, Richard King

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

An all-optical technique has been used to provide the first direct measurement of anisotropic minority-carrier diffusion in an ordered alloy of GaInP. Direct imaging of the minority-carrier diffusion distribution resulting from generation at a quasipoint source is obtained using an optical microscope coupled to a scanning electron microscope. Minority-carrier diffusion lengths ranging from 3 to 60 μm are measured by this technique in double heterostructures of GaInP, GaAs, and GaInAs, providing a key parameter of interest to the performance of state-of-the-art triple junction solar cells. Here we show a direct measurement of anisotropy in minority-carrier mobility in ordered GaInP, which is evident in the oval-shaped distribution of the recombination luminescence. A factor of 1.6 increase in minority electron mobility along the [110] major axis is reported.

Original languageEnglish (US)
Article number023711
JournalJournal of Applied Physics
Volume105
Issue number2
DOIs
StatePublished - 2009
Externally publishedYes

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minority carriers
minorities
diffusion length
carrier mobility
optical microscopes
electron mobility
solar cells
electron microscopes
luminescence
anisotropy
scanning

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Haegel, N. M., Mills, T. J., Talmadge, M., Scandrett, C., Frenzen, C. L., Yoon, H., ... King, R. (2009). Direct imaging of anisotropic minority-carrier diffusion in ordered GaInP. Journal of Applied Physics, 105(2), [023711]. https://doi.org/10.1063/1.3068196

Direct imaging of anisotropic minority-carrier diffusion in ordered GaInP. / Haegel, N. M.; Mills, T. J.; Talmadge, M.; Scandrett, C.; Frenzen, C. L.; Yoon, H.; Fetzer, C. M.; King, Richard.

In: Journal of Applied Physics, Vol. 105, No. 2, 023711, 2009.

Research output: Contribution to journalArticle

Haegel, NM, Mills, TJ, Talmadge, M, Scandrett, C, Frenzen, CL, Yoon, H, Fetzer, CM & King, R 2009, 'Direct imaging of anisotropic minority-carrier diffusion in ordered GaInP', Journal of Applied Physics, vol. 105, no. 2, 023711. https://doi.org/10.1063/1.3068196
Haegel NM, Mills TJ, Talmadge M, Scandrett C, Frenzen CL, Yoon H et al. Direct imaging of anisotropic minority-carrier diffusion in ordered GaInP. Journal of Applied Physics. 2009;105(2). 023711. https://doi.org/10.1063/1.3068196
Haegel, N. M. ; Mills, T. J. ; Talmadge, M. ; Scandrett, C. ; Frenzen, C. L. ; Yoon, H. ; Fetzer, C. M. ; King, Richard. / Direct imaging of anisotropic minority-carrier diffusion in ordered GaInP. In: Journal of Applied Physics. 2009 ; Vol. 105, No. 2.
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