Resonant Raman characterization of polarons and bipolarons in alkali-metal-doped poly(p-phenyelenevinylene)

A. Sakamoto, Yukio Furukawa, M. Tasumi

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The resonant Raman spectra of lightly sodium-doped and heavily potassium-doped poly(p-phenyelenevinylene)'s (PPV's) have been studied. These spectra have been analyzed on the basis of the resonant Raman spectra of the radical anions and dianions of three model compounds CH3(C6H4CH = CH)nC6H4CH3 (PVn, n = 1-3), which correspond, respectively, to negative polarons and bipolarons in PPV. The lightly sodium-doped PPV film contains a bipolaron which is localized in a region close to PV3, in addition to two kinds of polarons whose lengths are close to PV2 and PV3. The 1064-nm-excited resonant Raman spectrum of potassium-doped PPV is attributed to a bipolaron localized in a region close to PV3. The resonant Raman spectra of potassium-doped PPV excited at 514.5, 632.8 and 752.5 nm are explained by the existence of negative polarons. However, the bands in the 1271 - 1246 cm-1 range, which are observed for sodium-doped PPV and assigned to polarons, are not observed for potassium-doped PPV. The reason for their absence is discussed.

Original languageEnglish
Pages (from-to)593-598
Number of pages6
JournalSynthetic Metals
Volume55
Issue number1
DOIs
Publication statusPublished - 1993 Mar 15
Externally publishedYes

Fingerprint

Alkali Metals
Polarons
Alkali metals
polarons
alkali metals
Potassium
Raman scattering
potassium
Raman spectra
Sodium
sodium
Anions
Negative ions
methylidyne
anions

Keywords

  • Alkali metal doping
  • Bipolaron
  • Polaron
  • poly(p-phenyelenevinylene)
  • Resonant Raman spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Resonant Raman characterization of polarons and bipolarons in alkali-metal-doped poly(p-phenyelenevinylene). / Sakamoto, A.; Furukawa, Yukio; Tasumi, M.

In: Synthetic Metals, Vol. 55, No. 1, 15.03.1993, p. 593-598.

Research output: Contribution to journalArticle

@article{2faf2af6ef3a42a692e5f9d0aecbeacd,
title = "Resonant Raman characterization of polarons and bipolarons in alkali-metal-doped poly(p-phenyelenevinylene)",
abstract = "The resonant Raman spectra of lightly sodium-doped and heavily potassium-doped poly(p-phenyelenevinylene)'s (PPV's) have been studied. These spectra have been analyzed on the basis of the resonant Raman spectra of the radical anions and dianions of three model compounds CH3(C6H4CH = CH)nC6H4CH3 (PVn, n = 1-3), which correspond, respectively, to negative polarons and bipolarons in PPV. The lightly sodium-doped PPV film contains a bipolaron which is localized in a region close to PV3, in addition to two kinds of polarons whose lengths are close to PV2 and PV3. The 1064-nm-excited resonant Raman spectrum of potassium-doped PPV is attributed to a bipolaron localized in a region close to PV3. The resonant Raman spectra of potassium-doped PPV excited at 514.5, 632.8 and 752.5 nm are explained by the existence of negative polarons. However, the bands in the 1271 - 1246 cm-1 range, which are observed for sodium-doped PPV and assigned to polarons, are not observed for potassium-doped PPV. The reason for their absence is discussed.",
keywords = "Alkali metal doping, Bipolaron, Polaron, poly(p-phenyelenevinylene), Resonant Raman spectroscopy",
author = "A. Sakamoto and Yukio Furukawa and M. Tasumi",
year = "1993",
month = "3",
day = "15",
doi = "10.1016/0379-6779(93)90997-B",
language = "English",
volume = "55",
pages = "593--598",
journal = "Synthetic Metals",
issn = "0379-6779",
publisher = "Elsevier BV",
number = "1",

}

TY - JOUR

T1 - Resonant Raman characterization of polarons and bipolarons in alkali-metal-doped poly(p-phenyelenevinylene)

AU - Sakamoto, A.

AU - Furukawa, Yukio

AU - Tasumi, M.

PY - 1993/3/15

Y1 - 1993/3/15

N2 - The resonant Raman spectra of lightly sodium-doped and heavily potassium-doped poly(p-phenyelenevinylene)'s (PPV's) have been studied. These spectra have been analyzed on the basis of the resonant Raman spectra of the radical anions and dianions of three model compounds CH3(C6H4CH = CH)nC6H4CH3 (PVn, n = 1-3), which correspond, respectively, to negative polarons and bipolarons in PPV. The lightly sodium-doped PPV film contains a bipolaron which is localized in a region close to PV3, in addition to two kinds of polarons whose lengths are close to PV2 and PV3. The 1064-nm-excited resonant Raman spectrum of potassium-doped PPV is attributed to a bipolaron localized in a region close to PV3. The resonant Raman spectra of potassium-doped PPV excited at 514.5, 632.8 and 752.5 nm are explained by the existence of negative polarons. However, the bands in the 1271 - 1246 cm-1 range, which are observed for sodium-doped PPV and assigned to polarons, are not observed for potassium-doped PPV. The reason for their absence is discussed.

AB - The resonant Raman spectra of lightly sodium-doped and heavily potassium-doped poly(p-phenyelenevinylene)'s (PPV's) have been studied. These spectra have been analyzed on the basis of the resonant Raman spectra of the radical anions and dianions of three model compounds CH3(C6H4CH = CH)nC6H4CH3 (PVn, n = 1-3), which correspond, respectively, to negative polarons and bipolarons in PPV. The lightly sodium-doped PPV film contains a bipolaron which is localized in a region close to PV3, in addition to two kinds of polarons whose lengths are close to PV2 and PV3. The 1064-nm-excited resonant Raman spectrum of potassium-doped PPV is attributed to a bipolaron localized in a region close to PV3. The resonant Raman spectra of potassium-doped PPV excited at 514.5, 632.8 and 752.5 nm are explained by the existence of negative polarons. However, the bands in the 1271 - 1246 cm-1 range, which are observed for sodium-doped PPV and assigned to polarons, are not observed for potassium-doped PPV. The reason for their absence is discussed.

KW - Alkali metal doping

KW - Bipolaron

KW - Polaron

KW - poly(p-phenyelenevinylene)

KW - Resonant Raman spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=0027554430&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027554430&partnerID=8YFLogxK

U2 - 10.1016/0379-6779(93)90997-B

DO - 10.1016/0379-6779(93)90997-B

M3 - Article

AN - SCOPUS:0027554430

VL - 55

SP - 593

EP - 598

JO - Synthetic Metals

JF - Synthetic Metals

SN - 0379-6779

IS - 1

ER -