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Exciton localization in AlGaN alloys
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10.1063/1.2172728
/content/aip/journal/apl/88/6/10.1063/1.2172728
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/6/10.1063/1.2172728
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

PL spectra of alloy measured from .

Image of FIG. 2.
FIG. 2.

The temperature dependence of the excitonic emission peak energy between 10 and for different . The solid lines are the least-squares fit of the data with the Varshni equation, Eq. (1). Deviations from Eq. (1) at the lowest measurement temperatures are the measures of the exciton localization energies, .

Image of FIG. 3.
FIG. 3.

Variations of the (a) exciton localization energy , (b) thermal activation energy , and (c) full width at half maximum of the PL emission line with Al content in alloys. , , and all increase with for , decrease with for , and have a maximum at . [The solid curve in (c) is a calculation result of Eq. (3)].

Image of FIG. 4.
FIG. 4.

(a) Exciton localization energy as a function of the thermal activation energy of the localized exciton in AlGaN alloys. Solid line is a linear fit with a slope of 1. (b) Measured full width at half maximum of the localized exciton emission line as a function of in AlGaN alloys. Solid line is a linear fit with a slope of 0.4.

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/content/aip/journal/apl/88/6/10.1063/1.2172728
2006-02-06
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Exciton localization in AlGaN alloys
http://aip.metastore.ingenta.com/content/aip/journal/apl/88/6/10.1063/1.2172728
10.1063/1.2172728
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