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Carrier recombination losses in inverted polymer: Fullerene solar cells with ZnO hole-blocking layer from transient photovoltage and impedance spectroscopy techniques
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10.1063/1.3561437
/content/aip/journal/jap/109/7/10.1063/1.3561437
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/7/10.1063/1.3561437
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Normalized TPV signals produced by a small-amplitude laser pulse on inverted organic solar cells with ZnO hole-blocking layer. Different steady-state open-circuit values are indicated.

Image of FIG. 2.
FIG. 2.

(Color online) Example of impedance spectroscopy spectra registered in open-circuit conditions at different white light illumination intensities. Low-frequency arc is produced by the parallel connection of recombination resistance and charge storage, chemical capacitance . Carrier lifetime is calculated from .

Image of FIG. 3.
FIG. 3.

(Color online) Comparison of carrier lifetime extracted from TPV and IS techniques on inverted organic solar cells with ZnO hole-blocking layer.

Image of FIG. 4.
FIG. 4.

(Color online) (a) Recombination resistance and chemical capacitance extracted from IS. Both parameters exhibit an exponential dependence on as , and with , and , respectively. If an exponential tail of trapping states is assumed as , then being the characteristic temperature of the exponential distribution. (b) Carrier lifetime as a function of the photogenerated carrier density, exhibiting a power-law as with . Recombination coefficient calculated using Eq. (6).

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/content/aip/journal/jap/109/7/10.1063/1.3561437
2011-04-11
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Carrier recombination losses in inverted polymer: Fullerene solar cells with ZnO hole-blocking layer from transient photovoltage and impedance spectroscopy techniques
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/7/10.1063/1.3561437
10.1063/1.3561437
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