Charge injection into OLED's during operation studied by electroabsorption screening

M. Liess; C. Giebeler; P. A. Lane; D. D.C. Bradley; P. L. Burn; G. Webster; G. Ruani; R. Michel; C. Taliani

doi:10.1016/S0379-6779(98)01366-6

Charge injection into OLED's during operation studied by electroabsorption screening

M. Liess, C. Giebeler, P. A. Lane, D. D.C. Bradley, P. L. Burn, G. Webster, G. Ruani, R. Michel, C. Taliani

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Organic light emitting devices (OLED) were operated using an AC voltage with DC offset (operating voltage). Electroabsorption (EA) signals as a function of a DC-offset were measured at 2f. Higher absolute DC offset voltages lead to a reduction of the EA signal. The effect observed can well be explained in terms of an extended electroabsorption model including Thomas-Fermi screening: The AC component of the electric field is shielded due to charge injection caused by the DC offset. This new device characterization technique allows monitoring the charge carrier statistics in the device during operation. It was found that the EA signal indicates the threshold of monopolar and bipolar charge injection. The presence of negative charges enhances drastically the injection and presence of positive charges in the device.

Original language	English (US)
Journal	Synthetic Metals
Volume	102
Issue number	1-3
DOIs	https://doi.org/10.1016/S0379-6779(98)01366-6
State	Published - Jan 1 1999
Externally published	Yes

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title = "Charge injection into OLED's during operation studied by electroabsorption screening",

abstract = "Organic light emitting devices (OLED) were operated using an AC voltage with DC offset (operating voltage). Electroabsorption (EA) signals as a function of a DC-offset were measured at 2f. Higher absolute DC offset voltages lead to a reduction of the EA signal. The effect observed can well be explained in terms of an extended electroabsorption model including Thomas-Fermi screening: The AC component of the electric field is shielded due to charge injection caused by the DC offset. This new device characterization technique allows monitoring the charge carrier statistics in the device during operation. It was found that the EA signal indicates the threshold of monopolar and bipolar charge injection. The presence of negative charges enhances drastically the injection and presence of positive charges in the device.",

author = "M. Liess and C. Giebeler and Lane, {P. A.} and Bradley, {D. D.C.} and Burn, {P. L.} and G. Webster and G. Ruani and R. Michel and C. Taliani",

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T1 - Charge injection into OLED's during operation studied by electroabsorption screening

AU - Liess, M.

AU - Giebeler, C.

AU - Lane, P. A.

AU - Bradley, D. D.C.

AU - Burn, P. L.

AU - Webster, G.

AU - Ruani, G.

AU - Michel, R.

AU - Taliani, C.

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

PY - 1999/1/1

Y1 - 1999/1/1

N2 - Organic light emitting devices (OLED) were operated using an AC voltage with DC offset (operating voltage). Electroabsorption (EA) signals as a function of a DC-offset were measured at 2f. Higher absolute DC offset voltages lead to a reduction of the EA signal. The effect observed can well be explained in terms of an extended electroabsorption model including Thomas-Fermi screening: The AC component of the electric field is shielded due to charge injection caused by the DC offset. This new device characterization technique allows monitoring the charge carrier statistics in the device during operation. It was found that the EA signal indicates the threshold of monopolar and bipolar charge injection. The presence of negative charges enhances drastically the injection and presence of positive charges in the device.

AB - Organic light emitting devices (OLED) were operated using an AC voltage with DC offset (operating voltage). Electroabsorption (EA) signals as a function of a DC-offset were measured at 2f. Higher absolute DC offset voltages lead to a reduction of the EA signal. The effect observed can well be explained in terms of an extended electroabsorption model including Thomas-Fermi screening: The AC component of the electric field is shielded due to charge injection caused by the DC offset. This new device characterization technique allows monitoring the charge carrier statistics in the device during operation. It was found that the EA signal indicates the threshold of monopolar and bipolar charge injection. The presence of negative charges enhances drastically the injection and presence of positive charges in the device.

UR - https://linkinghub.elsevier.com/retrieve/pii/S0379677998013666

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U2 - 10.1016/S0379-6779(98)01366-6

DO - 10.1016/S0379-6779(98)01366-6

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SN - 0379-6779

VL - 102

JO - Synthetic Metals

JF - Synthetic Metals

IS - 1-3

ER -

Charge injection into OLED's during operation studied by electroabsorption screening

Abstract

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