Field screening effects in polymer light emitting diodes

Paul J. Brewer; Paul A. Lane; Donal D.C. Bradley; Andrew J. Demello; John C. DeMello

doi:10.1117/12.546904

Field screening effects in polymer light emitting diodes

Paul J. Brewer, Paul A. Lane, Donal D.C. Bradley, Andrew J. Demello, John C. DeMello

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

We use electromodulation (EM) spectroscopy to probe the electric field distribution in polymer light-emitting diodes. The EM spectrum below the turn-on bias is dominated by electroabsorption of the emissive layer but vanishes completely above the turn-on bias. The EM spectrum above turn-on is due entirely to absorption and bleaching effects arising from injected charge. The total elimination of the electroabsorption signal indicates that the internal electric field is effectively screened by the injected charge, and this effect is attributed to accumulation of trapped electrons close to the anode.

Original language	English (US)
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering
DOIs	https://doi.org/10.1117/12.546904
State	Published - Dec 20 2004
Externally published	Yes

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@inproceedings{eb654c4a9f22426a960eb6c3b40b759e,

title = "Field screening effects in polymer light emitting diodes",

abstract = "We use electromodulation (EM) spectroscopy to probe the electric field distribution in polymer light-emitting diodes. The EM spectrum below the turn-on bias is dominated by electroabsorption of the emissive layer but vanishes completely above the turn-on bias. The EM spectrum above turn-on is due entirely to absorption and bleaching effects arising from injected charge. The total elimination of the electroabsorption signal indicates that the internal electric field is effectively screened by the injected charge, and this effect is attributed to accumulation of trapped electrons close to the anode.",

author = "Brewer, {Paul J.} and Lane, {Paul A.} and Bradley, {Donal D.C.} and Demello, {Andrew J.} and DeMello, {John C.}",

note = "Generated from Scopus record by KAUST IRTS on 2019-11-27",

year = "2004",

month = dec,

day = "20",

doi = "10.1117/12.546904",

language = "English (US)",

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T1 - Field screening effects in polymer light emitting diodes

AU - Brewer, Paul J.

AU - Lane, Paul A.

AU - Bradley, Donal D.C.

AU - Demello, Andrew J.

AU - DeMello, John C.

N1 - Generated from Scopus record by KAUST IRTS on 2019-11-27

PY - 2004/12/20

Y1 - 2004/12/20

N2 - We use electromodulation (EM) spectroscopy to probe the electric field distribution in polymer light-emitting diodes. The EM spectrum below the turn-on bias is dominated by electroabsorption of the emissive layer but vanishes completely above the turn-on bias. The EM spectrum above turn-on is due entirely to absorption and bleaching effects arising from injected charge. The total elimination of the electroabsorption signal indicates that the internal electric field is effectively screened by the injected charge, and this effect is attributed to accumulation of trapped electrons close to the anode.

AB - We use electromodulation (EM) spectroscopy to probe the electric field distribution in polymer light-emitting diodes. The EM spectrum below the turn-on bias is dominated by electroabsorption of the emissive layer but vanishes completely above the turn-on bias. The EM spectrum above turn-on is due entirely to absorption and bleaching effects arising from injected charge. The total elimination of the electroabsorption signal indicates that the internal electric field is effectively screened by the injected charge, and this effect is attributed to accumulation of trapped electrons close to the anode.

UR - http://proceedings.spiedigitallibrary.org/proceeding.aspx?doi=10.1117/12.546904

UR - http://www.scopus.com/inward/record.url?scp=10044283150&partnerID=8YFLogxK

U2 - 10.1117/12.546904

DO - 10.1117/12.546904

M3 - Conference contribution

BT - Proceedings of SPIE - The International Society for Optical Engineering

ER -

Field screening effects in polymer light emitting diodes

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