Vibrational spectroscopy study on α and β phases in iridium-complex-containing polyfluorenes

Taiju Tsuboi; Hui Fang Shi; Yosuke Nakai; Shu Juan Liu; Qiang Zhao; Wei Huang

doi:10.1002/pssc.201084050

Vibrational spectroscopy study on α and β phases in iridium-complex-containing polyfluorenes

Taiju Tsuboi, Hui Fang Shi, Yosuke Nakai, Shu Juan Liu, Qiang Zhao, Wei Huang

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

2 Scopus citations

Abstract

UV-visible-infrared absorption, photoluminescence (PL), and Raman spectra have been investigated for poly(9,9-dioctylfluorene) (PFO) and PFO copolymers with various concentrations (0-20 mol%) of Ir-complex Ir(thq)₂(dbm) incorporated into the main polymer chain. PFOs with different contents of α- and β-phases are obtained depending on the concentration. New infrared absorption peak was found at 2918 cm^-1 in PFOs with high Ir-complex concentrations. The PL spectra of β-phase PFO host were analyzed by the Franck-Condon factor, Huang-Rhys parameter S, and vibrational energy of 1360 cm^-1. The vibrational energy is consistent with Raman spectra. The S parameter was found to depend on the concentration of Ir-complex. Red emission due to Ir(thq)₂(dbm) disappeared for PFO copolymers with 2 and 8 mole% Ir-complex four months after the spin-coating, while new emission band at 520 nm appeared.

Original language	English
Pages (from-to)	2713-2716
Number of pages	4
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	8
Issue number	9
DOIs	https://doi.org/10.1002/pssc.201084050
State	Published - Sep 2011
Externally published	Yes

Keywords

FTIR
Ir(thq)2(dbm)
PFO-Ir-complex copolymer
Photoluminescence
Polyfluorene

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10.1002/pssc.201084050

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title = "Vibrational spectroscopy study on α and β phases in iridium-complex-containing polyfluorenes",

abstract = "UV-visible-infrared absorption, photoluminescence (PL), and Raman spectra have been investigated for poly(9,9-dioctylfluorene) (PFO) and PFO copolymers with various concentrations (0-20 mol%) of Ir-complex Ir(thq)2(dbm) incorporated into the main polymer chain. PFOs with different contents of α- and β-phases are obtained depending on the concentration. New infrared absorption peak was found at 2918 cm-1 in PFOs with high Ir-complex concentrations. The PL spectra of β-phase PFO host were analyzed by the Franck-Condon factor, Huang-Rhys parameter S, and vibrational energy of 1360 cm-1. The vibrational energy is consistent with Raman spectra. The S parameter was found to depend on the concentration of Ir-complex. Red emission due to Ir(thq)2(dbm) disappeared for PFO copolymers with 2 and 8 mole% Ir-complex four months after the spin-coating, while new emission band at 520 nm appeared.",

keywords = "FTIR, Ir(thq)2(dbm), PFO-Ir-complex copolymer, Photoluminescence, Polyfluorene",

author = "Taiju Tsuboi and Shi, {Hui Fang} and Yosuke Nakai and Liu, {Shu Juan} and Qiang Zhao and Wei Huang",

year = "2011",

month = sep,

doi = "10.1002/pssc.201084050",

language = "英语",

volume = "8",

pages = "2713--2716",

journal = "Physica Status Solidi (C) Current Topics in Solid State Physics",

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publisher = "Wiley-VCH Verlag",

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T1 - Vibrational spectroscopy study on α and β phases in iridium-complex-containing polyfluorenes

AU - Tsuboi, Taiju

AU - Shi, Hui Fang

AU - Nakai, Yosuke

AU - Liu, Shu Juan

AU - Zhao, Qiang

AU - Huang, Wei

PY - 2011/9

Y1 - 2011/9

N2 - UV-visible-infrared absorption, photoluminescence (PL), and Raman spectra have been investigated for poly(9,9-dioctylfluorene) (PFO) and PFO copolymers with various concentrations (0-20 mol%) of Ir-complex Ir(thq)2(dbm) incorporated into the main polymer chain. PFOs with different contents of α- and β-phases are obtained depending on the concentration. New infrared absorption peak was found at 2918 cm-1 in PFOs with high Ir-complex concentrations. The PL spectra of β-phase PFO host were analyzed by the Franck-Condon factor, Huang-Rhys parameter S, and vibrational energy of 1360 cm-1. The vibrational energy is consistent with Raman spectra. The S parameter was found to depend on the concentration of Ir-complex. Red emission due to Ir(thq)2(dbm) disappeared for PFO copolymers with 2 and 8 mole% Ir-complex four months after the spin-coating, while new emission band at 520 nm appeared.

AB - UV-visible-infrared absorption, photoluminescence (PL), and Raman spectra have been investigated for poly(9,9-dioctylfluorene) (PFO) and PFO copolymers with various concentrations (0-20 mol%) of Ir-complex Ir(thq)2(dbm) incorporated into the main polymer chain. PFOs with different contents of α- and β-phases are obtained depending on the concentration. New infrared absorption peak was found at 2918 cm-1 in PFOs with high Ir-complex concentrations. The PL spectra of β-phase PFO host were analyzed by the Franck-Condon factor, Huang-Rhys parameter S, and vibrational energy of 1360 cm-1. The vibrational energy is consistent with Raman spectra. The S parameter was found to depend on the concentration of Ir-complex. Red emission due to Ir(thq)2(dbm) disappeared for PFO copolymers with 2 and 8 mole% Ir-complex four months after the spin-coating, while new emission band at 520 nm appeared.

KW - FTIR

KW - Ir(thq)2(dbm)

KW - PFO-Ir-complex copolymer

KW - Photoluminescence

KW - Polyfluorene

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U2 - 10.1002/pssc.201084050

DO - 10.1002/pssc.201084050

M3 - 文章

AN - SCOPUS:80052338447

SN - 1862-6351

VL - 8

SP - 2713

EP - 2716

JO - Physica Status Solidi (C) Current Topics in Solid State Physics

JF - Physica Status Solidi (C) Current Topics in Solid State Physics

IS - 9

ER -

Vibrational spectroscopy study on α and β phases in iridium-complex-containing polyfluorenes

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Keywords

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