Influence of hole transport units on the efficiency of polymer light emitting diodes

Frádáric Laquai; Dirk Hertel

doi:10.1063/1.2719212

Influence of hole transport units on the efficiency of polymer light emitting diodes

Frádáric Laquai, Dirk Hertel^*

^*Corresponding author for this work

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

31 Scopus citations

Abstract

Charge transport and electroluminescence efficiency in spirobifluorene polymers containing triarylamine as hole transport unit have been studied. The hole mobility as measured by the time-of-flight technique was found to be on the order of 10-4 cm2 V-1 s-1. The field and temperature dependences of the mobility are in accord with the Gaussian disorder model. Best device efficiencies of the blue emitting materials are in the range of 2.9 cdA. The influence of the hole transport unit on charge transport and device efficiency is analyzed. The efficiency depends critically on the amount of the hole transport unit and decreases with increasing hole mobility.

Original language	English (US)
Article number	142109
Journal	Applied Physics Letters
Volume	90
Issue number	14
DOIs	https://doi.org/10.1063/1.2719212
State	Published - 2007
Externally published	Yes

Bibliographical note

Funding Information:
One of the authors (D.H.) would like to thank K. Meerholz for his support. Another author (F.L.) acknowledges G. Wegner for fruitful discussions and a Kekulé graduate scholarship of the Fonds der Chemischen Industrie. They are indebted to Merck OLED Materials GmbH for the polymers. Part of this work was supported by the Fonds der Chemischen Industrie and the BMBF OLAS under Project No. FKZ 13N8167.

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Influence of hole transport units on the efficiency of polymer light emitting diodes",

abstract = "Charge transport and electroluminescence efficiency in spirobifluorene polymers containing triarylamine as hole transport unit have been studied. The hole mobility as measured by the time-of-flight technique was found to be on the order of 10-4 cm2 V-1 s-1. The field and temperature dependences of the mobility are in accord with the Gaussian disorder model. Best device efficiencies of the blue emitting materials are in the range of 2.9 cdA. The influence of the hole transport unit on charge transport and device efficiency is analyzed. The efficiency depends critically on the amount of the hole transport unit and decreases with increasing hole mobility.",

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AB - Charge transport and electroluminescence efficiency in spirobifluorene polymers containing triarylamine as hole transport unit have been studied. The hole mobility as measured by the time-of-flight technique was found to be on the order of 10-4 cm2 V-1 s-1. The field and temperature dependences of the mobility are in accord with the Gaussian disorder model. Best device efficiencies of the blue emitting materials are in the range of 2.9 cdA. The influence of the hole transport unit on charge transport and device efficiency is analyzed. The efficiency depends critically on the amount of the hole transport unit and decreases with increasing hole mobility.

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Influence of hole transport units on the efficiency of polymer light emitting diodes

Abstract

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