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p-type doping effect on the performance of organic-inorganic hybrid solar cells
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Figures

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FIG. 1.

(Color online) Electrical output characteristics of the n-SiNWs/P3HT hybrid device with different air exposure time. (a) J-V curves of the device under AM 1.5 G light, (b) EQE spectra of the device.

Image of FIG. 2.

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FIG. 2.

(Color online) Energy band diagram of the In:Ga/SiNWs/P3HT/Cu device. With the p-type doping increment, the Fermi level of P3HT shifted towards its HOMO level.

Image of FIG. 3.

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FIG. 3.

(Color online) Electrical output characteristics of the hybrid device based on F4-TCNQ doped P3HT with different air exposure time. (a) J-V curves of the doped device under AM 1.5G light, (b) EQE spectra of the doped device.

Image of FIG. 4.

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FIG. 4.

(Color online) Dark J-V curves of the devices (a) without and (b) with F4-TCNQ molecules with the different air exposure time.

Tables

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Table I.

Electrical output characteristics of the different devices without and with F4-TCNQ molecules dopant with different air exposure time.

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2011-12-08
2014-04-23

Abstract

The doping effects in poly(3-hexylthiophene) (P3HT) on the hybrid n-Si/P3HT solar cells were investigated. Oxygen and tetrafluoro-tetracyanoquinodimethane (F4-TCNQ) doping in P3HT could dramatically improve the device performance. The improvements were related to the Fermi level shift in P3HT towards its highest occupied molecular orbital, leading to a larger built-in voltage generated at the n-Si/P3HT interface for favorable charge transfer. This Fermi level shift was ascribed to the electron transfer from P3HT to the dopant, which was characterized by the absorption spectra and the photoluminescence lifetime. Solution-based F4-TCNQ displayed as a potential candidate to p-doped conjugated polymer to improve charge transfer/transport properties for the hybridsolar cells.

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Scitation: p-type doping effect on the performance of organic-inorganic hybrid solar cells
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/23/10.1063/1.3669393
10.1063/1.3669393
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