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Polymer photovoltaic cells with a graded active region achieved using double stamp transfer printing
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10.1063/1.4829040
/content/aip/journal/apl/103/19/10.1063/1.4829040
http://aip.metastore.ingenta.com/content/aip/journal/apl/103/19/10.1063/1.4829040

Figures

Image of FIG. 1.
FIG. 1.

Device fabrication sequence of P3HT:PCBM polymer solar cells using the double stamp transfer printing technique.

Image of FIG. 2.
FIG. 2.

X-ray photoelectron spectra of P3HT:PCBM film spin coated (control device) and double stamp transfer printed (printed device) on an ITO/MoO coated glass substrate. The O peak intensity at 531 eV is considerably higher in the stamp-transferred film compared to the spin-coated film, indicating that the relative content of PCBM at the interface with the cathode is increased for the stamp transfer printed film.

Image of FIG. 3.
FIG. 3.

Contact angle measurements of P3HT:PCBM film spin coated and double stamp transfer printed on a ITO/MoO substrate, using water was the probing solvent. Vertical red bars are tangent to the contact angle. The scale bar indicates 1 mm.

Image of FIG. 4.
FIG. 4.

Time of flight secondary ion mass spectrometry depth profiles of the S- ion (characteristic of P3HT) of spin coated and double stamp transfer printed P3HT:PCBM active layers versus the distance from P3HT:PCBM/Al interface.

Image of FIG. 5.
FIG. 5.

Current density-voltage curves of spin coated (control device) and double stamp transfer printed (printed device) devices under (a) dark and (b) AM 1.5G, 1 sun illumination. Note that the dark current of the printed devices is decreased compared to the control due to efficient electron and hole blocking resulting from the concentration gradient achieved by printing. Similarly, the photocurrent of the printed devices is increased.

Image of FIG. 6.
FIG. 6.

External quantum efficiency vs. wavelength of spin coated (control device) and double stamp transfer printed (printed device) devices indicating the improved charge collection efficiency of the latter structure.

Tables

Generic image for table
Table I.

Performance characteristics of P3HT:PCBM polymer solar cells.

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/content/aip/journal/apl/103/19/10.1063/1.4829040
2013-11-04
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Polymer photovoltaic cells with a graded active region achieved using double stamp transfer printing
http://aip.metastore.ingenta.com/content/aip/journal/apl/103/19/10.1063/1.4829040
10.1063/1.4829040
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