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Intermediate-band material based on GaAs quantum rings for solar cells
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10.1063/1.3211971
/content/aip/journal/apl/95/7/10.1063/1.3211971
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/7/10.1063/1.3211971
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

A sketch illustrates the interband and intersubband transitions, intermediate levels, a two-step process ( and ), and a direct interband transition to the continuum .

Image of FIG. 2.
FIG. 2.

Photoluminescence spectrum measured at 77 K showing to bands. The two bands are by the inset as being emission from the intermediate band and from a shallow defect.

Image of FIG. 3.
FIG. 3.

Photoresponse spectra measured at 77 K for different bias voltages. These transitions are due to intersubband transitions in the quantum ring structure.

Image of FIG. 4.
FIG. 4.

Photoresponse spectra measured for zero bias voltage at different temperatures showing the presence of two bands. The two-step process ( and ) and a single process are proposed to explain the two bands in the spectra.

Image of FIG. 5.
FIG. 5.

Photocurrent and dark currents measured at room temperature as a function of bias voltage.

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/content/aip/journal/apl/95/7/10.1063/1.3211971
2009-08-21
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Intermediate-band material based on GaAs quantum rings for solar cells
http://aip.metastore.ingenta.com/content/aip/journal/apl/95/7/10.1063/1.3211971
10.1063/1.3211971
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