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Long minority carrier lifetime in Au-catalyzed GaAs/AlxGa1−xAs core-shell nanowires
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10.1063/1.4735002
/content/aip/journal/apl/101/2/10.1063/1.4735002
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/2/10.1063/1.4735002
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Figures

Image of FIG. 1.
FIG. 1.

FESEM images of (a) bare GaAs NWs, (b) GaAs/AlxGa1−xAs core-shell NWs, and (c) GaAs/AlxGa1−xAs/GaAs (xv = 0.5) core-shell-cap NWs. Scale bars are 1 μm.

Image of FIG. 2.
FIG. 2.

(a) Typical room temperature PL spectrum from single GaAs/AlxGa1−xAs (xv = 0.5) NWs showing a peak emission at 1.425 eV. The inset shows an optical microscope image of the excited NW. The scale bar is 6 μm. (b) Low power time-resolved PL at the peak emission energy of 1.425 eV from two single GaAs/AlxGa1−xAs (xv = 0.5) NWs. Mono-exponential fits are shown for each decay, with τmc as shown.

Image of FIG. 3.
FIG. 3.

Temperature dependence of the carrier lifetimes of GaAs/AlxGa1−xAs (xv = 0.5) NWs. Lifetimes are scattered around 1 ns and do not show obvious temperature dependency.

Image of FIG. 4.
FIG. 4.

Typical room temperature (a) single NW PL spectrum and (b) time-resolved PL transient from two single GaAs/AlxGa1−xAs NWs with AlxGa1−xAs (xv = 0.5) shell grown at 700 °C. Mono-exponential fits are shown for each decay, with τmc as shown.

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/content/aip/journal/apl/101/2/10.1063/1.4735002
2012-07-11
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Long minority carrier lifetime in Au-catalyzed GaAs/AlxGa1−xAs core-shell nanowires
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/2/10.1063/1.4735002
10.1063/1.4735002
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