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Fluorinated copper-phthalocyanine/cobalt-phthalocyaine organic heterojunctions: Charge transport and Kelvin probe studies
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10.1063/1.3699272
/content/aip/journal/apl/100/14/10.1063/1.3699272
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/14/10.1063/1.3699272

Figures

Image of FIG. 1.
FIG. 1.

100 nm × 100 nm AFM image of (a) 20 nm F16CuPc film on LaAlO3 substrate and (b) top surface of F16CuPc(20 nm)/CoPc(20 nm) heterojunction film. (c) GIXRD data for F16CuPc(20 nm)/CoPc(20 nm) heterojunction films. (d) X-ray reflectivity spectrum for F16CuPc(20 nm)/CoPc(20 nm) heterojunction films. Solid line is theoretical fit of the data. Inset show the depth profile of electron scattering length density (SLD).

Image of FIG. 2.
FIG. 2.

(a) Temperature dependence of resistivity (plotted on log-log scale) for CoPc, F16CuPc, and F16CuPc(20 nm)/CoPc(20 nm) heterojunction films. Inset shows the plot of reduced activation energy W(=−dln[ρ(T)]/dlnT) as a functions of temperature. (b)-(d) represent that temperature dependence J-V characteristics recorded for F16CuPc(20 nm)/CoPc(20 nm) heterojunction, CoPc, and F16CuPc films, respectively. The insets of (c) and (d) represent the temperature dependence of the mobility of respective films.

Image of FIG. 3.
FIG. 3.

(a) Schematic of F16CuPc/CoPc heterojunction films used for surface potential measurements. (b) Typical surface potential image of F16CuPc(20 nm)/CoPc(1 nm) heterojunction sample. (c) Plot of surface potential (φ) as a function of CoPc thickness for F16CuPc/CoPc heterojunction films. Inset shows the plot of φ as a function of F16CuPc thickness for F16CuPc/CoPc heterojunction films. (d) Schematic energy band diagram for the interface of F16CuPc/CoPc heterojunction.

Tables

Generic image for table
Table I.

Various parameters of F16CuPc(20 nm)/CoPc(20 nm) heterojunction films and substrate as obtained from the fitting of x-ray reflectivity data.

Generic image for table
Table II.

Values of hole concentration (n 0) and mobility (μ), determined using J-V characteristics for F16CuPc(20 nm)/CoPc(20 nm) heterojunction, CoPc(20 nm), and F16CuPc(20 nm) films.

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/content/aip/journal/apl/100/14/10.1063/1.3699272
2012-04-02
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Fluorinated copper-phthalocyanine/cobalt-phthalocyaine organic heterojunctions: Charge transport and Kelvin probe studies
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/14/10.1063/1.3699272
10.1063/1.3699272
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