Space-charge limited current and electroluminescence in conjugated polymer-based LEDs

V. N. Savvate'ev, M. Tarabia, H. Chayet, E. Z. Farragi, G. B. Cohen, S. Kirstein, D. Davidov, Y. Avny, Ronny Neumann

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We have studied the current versus voltage (I-V) and the luminescence versus voltage (EL-V) characteristics in PPV-based LED devices for different film thickness, d. For voltages below the EL threshold voltage, the I-V curves exhibit a linear regime (I∼V) at low voltages and quadratic (I∼V2) regime for higher voltages. The later is attributed to the space charge limited current mechanism assuming a single shallow trap level. The fit of the model to the experimental results is very good with a single fitting parameter, namely, the effective mobility. The extracted mobilities are compared to those measured independently by time-of-flight (TOF) photoconductivity. The SCLC model gives a reasonable explanation for the voltage threshold in EL.

Original languageEnglish
Pages (from-to)1269-1270
Number of pages2
JournalSynthetic Metals
Volume85
Issue number1-3
Publication statusPublished - Mar 15 1997

Fingerprint

Conjugated polymers
Electroluminescence
Electric space charge
electroluminescence
Light emitting diodes
space charge
light emitting diodes
threshold voltage
polymers
Electric potential
electric potential
Threshold voltage
photoconductivity
low voltage
high voltages
film thickness
traps
luminescence
Photoconductivity
curves

Keywords

  • Light sources
  • Poly(phenylene vinylene)
  • Transport Measurements

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Savvate'ev, V. N., Tarabia, M., Chayet, H., Farragi, E. Z., Cohen, G. B., Kirstein, S., ... Neumann, R. (1997). Space-charge limited current and electroluminescence in conjugated polymer-based LEDs. Synthetic Metals, 85(1-3), 1269-1270.

Space-charge limited current and electroluminescence in conjugated polymer-based LEDs. / Savvate'ev, V. N.; Tarabia, M.; Chayet, H.; Farragi, E. Z.; Cohen, G. B.; Kirstein, S.; Davidov, D.; Avny, Y.; Neumann, Ronny.

In: Synthetic Metals, Vol. 85, No. 1-3, 15.03.1997, p. 1269-1270.

Research output: Contribution to journalArticle

Savvate'ev, VN, Tarabia, M, Chayet, H, Farragi, EZ, Cohen, GB, Kirstein, S, Davidov, D, Avny, Y & Neumann, R 1997, 'Space-charge limited current and electroluminescence in conjugated polymer-based LEDs', Synthetic Metals, vol. 85, no. 1-3, pp. 1269-1270.
Savvate'ev VN, Tarabia M, Chayet H, Farragi EZ, Cohen GB, Kirstein S et al. Space-charge limited current and electroluminescence in conjugated polymer-based LEDs. Synthetic Metals. 1997 Mar 15;85(1-3):1269-1270.
Savvate'ev, V. N. ; Tarabia, M. ; Chayet, H. ; Farragi, E. Z. ; Cohen, G. B. ; Kirstein, S. ; Davidov, D. ; Avny, Y. ; Neumann, Ronny. / Space-charge limited current and electroluminescence in conjugated polymer-based LEDs. In: Synthetic Metals. 1997 ; Vol. 85, No. 1-3. pp. 1269-1270.
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