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Electron-hole pair mechanism for the magnetic field effect in organic light emitting diodes based on poly(paraphenylene vinylene)
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10.1063/1.3260249
/content/aip/journal/jap/106/11/10.1063/1.3260249
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/11/10.1063/1.3260249
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Figures

Image of FIG. 1.
FIG. 1.

(a) Percentage change in current (MC, filled symbols) and EL (MEL, open symbols) in SY-PPV devices with different emitter thicknesses at a magnetic field of 30 mT as a function of applied voltage at room temperature: squares—65 nm; triangles—200 nm; circles—350 nm. (b) Current-voltage characteristics (filled symbols) and luminance-voltage characteristics (open symbols) for the devices from (a).

Image of FIG. 2.
FIG. 2.

(a) Magnetoconductance in a conditioned device with 80 nm SY-PPV thickness as a function of applied voltage at different temperatures and a magnetic field of 30 mT. (b) Current-voltage characteristics for the device from (a) at different temperatures.

Image of FIG. 3.
FIG. 3.

(a) Percentage change of current (MC, filled symbols) and EL (MEL, open symbols) in SY-PPV devices with Ca cathode (squares) and Al cathode (circles) at a magnetic field of 30 mT as a function of applied voltage. The thickness of the SY-PPV layer is 170 nm. (b) Current-voltage characteristics (filled symbols) and luminance-voltage characteristics (open symbols) for the devices from (a).

Image of FIG. 4.
FIG. 4.

Normalized EL, , and as a function of current at a magnetic field of 30 mT for a device with a SY-PPV thickness of 80 nm.

Image of FIG. 5.
FIG. 5.

Absolute change in current as a function of current at different temperatures and a magnetic field of 30 mT for the SY-PPV device from Fig. 2

Image of FIG. 6.
FIG. 6.

(a) Calculated magnetic field effect for the concentration of e-h pairs (N), the concentration of molecular singlet exciton states (S), and triplet-exciton states (T) as a function of . The filled (open) symbols refer to the case of spin independent (spin dependent) e-h pair formation. (b) Calculated magnetic effect for the secondary current (Q) as a function of for different values of .

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/content/aip/journal/jap/106/11/10.1063/1.3260249
2009-12-01
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electron-hole pair mechanism for the magnetic field effect in organic light emitting diodes based on poly(paraphenylene vinylene)
http://aip.metastore.ingenta.com/content/aip/journal/jap/106/11/10.1063/1.3260249
10.1063/1.3260249
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