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Graded bandgap structure for PbS/CdS/ZnS quantum-dot-sensitized solar cells with a PbxCd1−xS interlayer
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10.1063/1.4804149
/content/aip/journal/apl/102/18/10.1063/1.4804149
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/18/10.1063/1.4804149

Figures

Image of FIG. 1.
FIG. 1.

Photocurrent-voltage curves of PbS/CdS/ZnS (bare) QDSCs with various PbCdS interlayer-deposition cycles (1, 2, or 3 cycles). The inset shows the power-conversion efficiencies of QDSCs as a function of the interlayer-deposition cycle.

Image of FIG. 2.
FIG. 2.

Scanning TEM image of PbS/PbCdS/CdS-sensitized TiO electrode (left) and EDX mapping in the selected area (right). Scale bar in the mapping represents 5 nm.

Image of FIG. 3.
FIG. 3.

IPCE spectra of PbS/CdS/ZnS (bare) QDSCs with various interlayer-deposition cycles (1, 2, or 3 cycles).

Image of FIG. 4.
FIG. 4.

(a) Absorbance spectra of PbS/CdS/ZnS (bare) quantum-dot sensitizers with various graded-interlayer-deposition cycles (1, 2, or 3 cycles) on the porous TiO electrode. (b) Absorbance spectra of individual single-layered quantum dots (PbS, PbCdS, or CdS). The inset shows vs. and linear fits for of the single-layered quantum dots.

Image of FIG. 5.
FIG. 5.

(a) Experimental decay curves of open-circuit voltage for the PbS/CdS/ZnS-sensitized (bare) solar cells with different interlayer-deposition cycles (1, 2, or 3 cycles). (b) Corresponding electron lifetimes as a function of voltage. The inset shows the recombination order .

Image of FIG. 6.
FIG. 6.

Schematic diagram of the effect of the PbCdS interlayer on the performance of the multilayered quantum-dot-sensitized solar cells.

Tables

Generic image for table
Table I.

Short-circuit current (), open-circuit voltage (), fill factor (), and power-conversion efficiency () of the PbS/CdS/ZnS (bare) QDSCs as a function of the PbCdS interlayer-deposition cycle (1, 2, or 3 cycles).

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/content/aip/journal/apl/102/18/10.1063/1.4804149
2013-05-06
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Graded bandgap structure for PbS/CdS/ZnS quantum-dot-sensitized solar cells with a PbxCd1−xS interlayer
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/18/10.1063/1.4804149
10.1063/1.4804149
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