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ZnO/Sn:In2O3 and ZnO/CdTe band offsets for extremely thin absorber photovoltaics
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10.1063/1.3672218
/content/aip/journal/apl/99/26/10.1063/1.3672218
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/26/10.1063/1.3672218

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) XPS spectrum of shallow core levels and valence band region for 12 Å ZnO/ITO/quartz. Inset shows a simulation (thick black line) of the experimental valence band (open symbols), after weighting and shifting VB spectra from bulk ITO and bulk ZnO (thin lines). (b) Conduction band offset for ZnO on ITO/quartz and schematic of band alignment.

Image of FIG. 2.
FIG. 2.

(Color online) (a) XPS spectrum of shallow core levels and valence band region for 10 Å ZnO/CdTe. Splitting in Te 4d peaks is due to presence of oxidized Te4+. Inset shows a simulation (thick black line) of the experimental valence band (open symbols), after weighting and shifting VB spectra from bulk CdTe and bulk ZnO (thin lines). (b) Conduction band offset for ZnO on CdTe and schematic of band alignment.

Image of FIG. 3.
FIG. 3.

(Color online) Lowest-energy interface structure for zinc blende ZnO(001) on CdTe(001), as calculated by HSE06+U, and schematic of calculated band alignment.

Tables

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Table I.

Results for bulk ZnO band gap and position of highest Zn 3d band at zone center relative to valence band maximum; and CdTe-ZnO valence band offset for lowest-energy interfacial geometry described in the text. Experimental band gap is for zinc-blende ZnO, while Zn 3d position is estimated from wurtzite data since no data for this level in zinc-blende ZnO has been reported, to our knowledge. The experimental band offset is from the present work. All results are in eV.

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/content/aip/journal/apl/99/26/10.1063/1.3672218
2011-12-28
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: ZnO/Sn:In2O3 and ZnO/CdTe band offsets for extremely thin absorber photovoltaics
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/26/10.1063/1.3672218
10.1063/1.3672218
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