Current-voltage characteristics of polymer light-emitting diodes

@inproceedings{Conwell1997CurrentvoltageCO,
  title={Current-voltage characteristics of polymer light-emitting diodes},
  author={Esther M. Conwell and Ming-Wei Wu},
  booktitle={Optics \& Photonics},
  year={1997}
}
Conduction in pristine conjugated polymers is by polaron hopping between sites corresponding to conjugation lengths. The strong increase of current I with voltage V observed for both emission-limited and ohmic contacts is due in large part to mobility increase as increasing field makes it more possible to overcome internal barriers, such as energy differences between sites. For emission-limited contacts an additional source of nonlinear increase of I with increasing V is greater ability to… 
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References

SHOWING 1-10 OF 18 REFERENCES

Factors determining polaron mobility in light-emitting diodes

Mobility of positive polarons in poly(phenylene vinylene), PPV, measured by time of flight methods, rages from approximately 10-3 to 10-7 cm2/Vs at room temperature. The large range indicates that

Direct measurement of conjugated polymer electronic excitation energies using metal/polymer/metal structures.

We report electroabsorption measurements of built-in electric fields and internal photoemission measurements of Schottky barriers to determine the charge transfer and single-particle energy gaps of

Electric-field and temperature dependence of the hole mobility in poly(p-phenylene vinylene)

The current-voltage characteristics of poly (cid:126) dialkoxy p -phenylene vinylene (cid:33) -based hole-only devices are measured as a function of temperature. The hole current is space-charge

Electrical impedance measurements of polymer light-emitting diodes

We report electrical impedance measurements of polymer light‐emitting diodes employing the soluble, conjugated polymer poly[2‐methoxy, 5‐(2’‐ethyl‐hexyloxy)‐1,4‐phenylene vinylene] (MEH‐PPV) as the

Theory of photoexcitations in phenylene-based polymers

We show that optical absorption spectra of polyphenylenes can be explained only within theoretical models that explicitly include the Coulomb interaction among the (pi) -electrons. We also show that

First-principles calculation of the three-dimensional band structure of poly(phenylene vinylene).

A local-density-functional calculation of the three-dimensional (3D) band structure of the conducting polymer poly(phenylene vinylene) (PPV) to investigate the effects of interchain coupling.

Simplified Theory of Space-Charge-Limited Currents in an Insulator with Traps

An ohmic contact between a metal and an insulator facilitates the injection of electrons into the insulator. Subsequent fiow of the electrons is space-charge limited. In real insulators the trapping

Nature of optical transitions in conjugated oligomers. II. Theoretical characterization of neutral and doped oligothiophenes

The optical transitions in α‐conjugated oligothiophenes are investigated on the basis of a theoretical approach, including correlation effects; the authors consider both the neutral and doped states.