The influence of tetrakis-ethylhexyloxy groups substituted in PPV derivative for PLEDs

Youngeup Jin; Jin Young Kim; Suhee Song; Yangjun Xia; Jaehong Kim; Han Young Woo; Kwanghee Lee; Hongsuk Suh

doi:10.1016/j.polymer.2007.11.040

The influence of tetrakis-ethylhexyloxy groups substituted in PPV derivative for PLEDs

Youngeup Jin, Jin Young Kim, Suhee Song, Yangjun Xia, Jaehong Kim, Han Young Woo, Kwanghee Lee, Hongsuk Suh

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

17 Citations (Scopus)

Abstract

New electroluminescent polymer with tetrakis-alkoxy group, poly[2,3,5,6-tetrakis(2-ethylhexyloxy)-1,4-phenylenevinylene] (TEH-PPV), has been synthesized by the Gilch polymerization. In solid film state, the TEH-PPV exhibits absorption spectra with maximum peaks at 451 nm, and PL spectrum at 505-545 nm. As compared to MEH-PPV, TEH-PPV with tetrakis-ethylhexyloxy groups in phenylene unit can get shorter conjugation length, and had more blue shifted absorption and emission peaks due to steric hindrance, in spite of increasing the number of alkoxy substituents which may increase the effective conjugation length caused by the electron-donating effect. The polymer LEDs (ITO/PEDOT/polymer/Al) of TEH-PPV showed emission with maximum peaks at around 505-590 nm. Tetrakis-ethylhexyloxy groups induced very typical vibronically structured band in solid film state, since the conjugated backbone is twisted by steric hindrance. And they can enhance the internal efficiency of the conjugated polymer as emissive layer in PLED because of the restraint of inter-chain interaction by the avoidance of close packing to give decent device performance.

Original language	English
Pages (from-to)	467-473
Number of pages	7
Journal	Polymer
Volume	49
Issue number	2
DOIs	https://doi.org/10.1016/j.polymer.2007.11.040
Publication status	Published - 2008 Jan 21
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (R01-2007-000-20853-0).

Keywords

PPV
Polymer light-emitting diodes
Tetrakis-alkoxy group

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1016/j.polymer.2007.11.040

Cite this

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title = "The influence of tetrakis-ethylhexyloxy groups substituted in PPV derivative for PLEDs",

abstract = "New electroluminescent polymer with tetrakis-alkoxy group, poly[2,3,5,6-tetrakis(2-ethylhexyloxy)-1,4-phenylenevinylene] (TEH-PPV), has been synthesized by the Gilch polymerization. In solid film state, the TEH-PPV exhibits absorption spectra with maximum peaks at 451 nm, and PL spectrum at 505-545 nm. As compared to MEH-PPV, TEH-PPV with tetrakis-ethylhexyloxy groups in phenylene unit can get shorter conjugation length, and had more blue shifted absorption and emission peaks due to steric hindrance, in spite of increasing the number of alkoxy substituents which may increase the effective conjugation length caused by the electron-donating effect. The polymer LEDs (ITO/PEDOT/polymer/Al) of TEH-PPV showed emission with maximum peaks at around 505-590 nm. Tetrakis-ethylhexyloxy groups induced very typical vibronically structured band in solid film state, since the conjugated backbone is twisted by steric hindrance. And they can enhance the internal efficiency of the conjugated polymer as emissive layer in PLED because of the restraint of inter-chain interaction by the avoidance of close packing to give decent device performance.",

keywords = "PPV, Polymer light-emitting diodes, Tetrakis-alkoxy group",

author = "Youngeup Jin and Kim, {Jin Young} and Suhee Song and Yangjun Xia and Jaehong Kim and Woo, {Han Young} and Kwanghee Lee and Hongsuk Suh",

note = "Funding Information: This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (R01-2007-000-20853-0).",

year = "2008",

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day = "21",

doi = "10.1016/j.polymer.2007.11.040",

language = "English",

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T1 - The influence of tetrakis-ethylhexyloxy groups substituted in PPV derivative for PLEDs

AU - Jin, Youngeup

AU - Kim, Jin Young

AU - Song, Suhee

AU - Xia, Yangjun

AU - Kim, Jaehong

AU - Woo, Han Young

AU - Lee, Kwanghee

AU - Suh, Hongsuk

N1 - Funding Information: This work was supported by the Korea Science and Engineering Foundation (KOSEF) grant funded by the Korea government (MOST) (R01-2007-000-20853-0).

PY - 2008/1/21

Y1 - 2008/1/21

N2 - New electroluminescent polymer with tetrakis-alkoxy group, poly[2,3,5,6-tetrakis(2-ethylhexyloxy)-1,4-phenylenevinylene] (TEH-PPV), has been synthesized by the Gilch polymerization. In solid film state, the TEH-PPV exhibits absorption spectra with maximum peaks at 451 nm, and PL spectrum at 505-545 nm. As compared to MEH-PPV, TEH-PPV with tetrakis-ethylhexyloxy groups in phenylene unit can get shorter conjugation length, and had more blue shifted absorption and emission peaks due to steric hindrance, in spite of increasing the number of alkoxy substituents which may increase the effective conjugation length caused by the electron-donating effect. The polymer LEDs (ITO/PEDOT/polymer/Al) of TEH-PPV showed emission with maximum peaks at around 505-590 nm. Tetrakis-ethylhexyloxy groups induced very typical vibronically structured band in solid film state, since the conjugated backbone is twisted by steric hindrance. And they can enhance the internal efficiency of the conjugated polymer as emissive layer in PLED because of the restraint of inter-chain interaction by the avoidance of close packing to give decent device performance.

AB - New electroluminescent polymer with tetrakis-alkoxy group, poly[2,3,5,6-tetrakis(2-ethylhexyloxy)-1,4-phenylenevinylene] (TEH-PPV), has been synthesized by the Gilch polymerization. In solid film state, the TEH-PPV exhibits absorption spectra with maximum peaks at 451 nm, and PL spectrum at 505-545 nm. As compared to MEH-PPV, TEH-PPV with tetrakis-ethylhexyloxy groups in phenylene unit can get shorter conjugation length, and had more blue shifted absorption and emission peaks due to steric hindrance, in spite of increasing the number of alkoxy substituents which may increase the effective conjugation length caused by the electron-donating effect. The polymer LEDs (ITO/PEDOT/polymer/Al) of TEH-PPV showed emission with maximum peaks at around 505-590 nm. Tetrakis-ethylhexyloxy groups induced very typical vibronically structured band in solid film state, since the conjugated backbone is twisted by steric hindrance. And they can enhance the internal efficiency of the conjugated polymer as emissive layer in PLED because of the restraint of inter-chain interaction by the avoidance of close packing to give decent device performance.

KW - PPV

KW - Polymer light-emitting diodes

KW - Tetrakis-alkoxy group

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The influence of tetrakis-ethylhexyloxy groups substituted in PPV derivative for PLEDs

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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