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Optimization of growth conditions of type-II Zn(Cd)Te/ZnCdSe submonolayer quantum dot superlattices for intermediate band solar cells
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10.1116/1.4797486
/content/avs/journal/jvstb/31/3/10.1116/1.4797486
http://aip.metastore.ingenta.com/content/avs/journal/jvstb/31/3/10.1116/1.4797486

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) MEE shutter sequence used during the growth of sample A. (b) Schematic diagram of a typical submonolayer Zn(Cd)Te/ZnCdSe QD SL.

Image of FIG. 2.
FIG. 2.

(Color online) (a) PL spectra of sample A at 10 K for two different excitation intensities. Inset: The plot of PL peak positions at 10 K for various excitation intensities; the dashed line represents the fitted curve with cube root of excitation intensity. (b) Experimental and simulated HRXRD plots for sample A along the (004) reflection. Inset: HRXRD peaks corresponding to the substrate, two buffer layers and SL(0).

Image of FIG. 3.
FIG. 3.

MEE shutter sequence used during the growth of (a) sample B and (b) sample C.

Image of FIG. 4.
FIG. 4.

(Color online) RHEED reconstruction pattern during the growth of ZnCdSe spacer (top) and Zn(Cd)Te QDs (bottom).

Image of FIG. 5.
FIG. 5.

(Color online) Experimental HRXRD plots along (004) reflection for (a) sample B, and (b) sample C. Inset: HRXRD peaks corresponding to the substrate, two buffer layers and SL(0).

Image of FIG. 6.
FIG. 6.

(Color online) (a) Experimental HRXRD plot for sample D along (004) reflection. Inset: HRXRD peaks corresponding to the substrate, two buffer layers and SL(0). (b) The PL spectra of sample D at 10 K for two different excitation intensities. Inset: The plot of PL energy at 30% of the PL peak at 10 K for various excitation intensities; the dashed line represents the fitted curve with cube root of excitation intensity.

Image of FIG. 7.
FIG. 7.

(Color online) Typical band line-up for a 1 nm thick ZnCdTe QD embedded in the ZnCdSe spacer.

Tables

Generic image for table
TABLE I.

Summary of the material parameters for sample A obtained from the simulation.

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/content/avs/journal/jvstb/31/3/10.1116/1.4797486
2013-03-21
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Optimization of growth conditions of type-II Zn(Cd)Te/ZnCdSe submonolayer quantum dot superlattices for intermediate band solar cells
http://aip.metastore.ingenta.com/content/avs/journal/jvstb/31/3/10.1116/1.4797486
10.1116/1.4797486
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