Electron Spin Resonance Spectra of Photogenerated Polarons in Poly(Paraphenylene Vinylene)

Autor:	Shuji Abe, Yukihiro Shimoi, Kazuhiro Murata, Shin-ichi Kuroda, Toshihiro Ohnishi, Takanobu Noguchi
Rok vydání:	1996
Předmět:	Esr spectra Materials science Condensed matter physics Spins General Physics and Astronomy Condensed Matter::Strongly Correlated Electrons Spin (physics) Anisotropy Polaron Electron spin resonance spectra Molecular physics Excitation Spectral line
Zdroj:	Journal of the Physical Society of Japan. 65:3743-3746
ISSN:	1347-4073 0031-9015
DOI:	10.1143/jpsj.65.3743
Popis:	Light-induced ESR (LESR) measurements have been performed on undoped poly(parapheny- lene vinylene) (PPV) down to 4 K. The ESR signal increases significantly for the excitation energy above 3.1–3.2 eV, as in the case of the excitation spectra of photocarriers reported in PPV derivatives. The anisotropic light-induced ESR spectra in oriented samples are well reproduced by the spectra calculated using a theoretical polaron spin distribution in the case of finite electron-electron interaction. These spectral features indicate that the observed spins are photogenerated polarons.
Databáze:	OpenAIRE
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