Electric field effects on photoluminescence of CdSe nanoparticles in a PMMA film

Takakazu Nakabayashi, Ruriko Ohshima, Nobuhiro Ohta

研究成果: Article査読

11 被引用数 (Scopus)

抄録

External electric field effects on spectra and decay of photoluminescence (PL) as well as on absorption spectra were measured for CdSe nanoparticles in a poly(methyl methacrylate) (PMMA) film. Electrophotoluminescence (E-PL) spectra as well as electroabsorption spectra show a remarkable Stark shift which depends on the particle size, indicating a large electric dipole moment in the first exciton state. The E-PL spectra also show that PL of CdSe is quenched by application of electric fields, and the magnitude of the field-induced quenching becomes larger with increasing size. The PL decay profiles observed in the absence and presence of electric field show that the field-induced quenching of PL mainly originates from the field-induced decrease in population of the emitting state prepared through the relaxation from the photoexcited state.

本文言語English
ページ(範囲)152-167
ページ数16
ジャーナルCrystals
4
2
DOI
出版ステータスPublished - 2014 6 23

ASJC Scopus subject areas

  • 化学工学(全般)
  • 材料科学(全般)
  • 凝縮系物理学
  • 無機化学

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