Raman spectral changes of PEDOT-PSS in polymer light-emitting diodes upon operation

Satoshi Sakamoto, Masanori Okumura, Zinggang Zhao, Yukio Furukawa*

*この研究の対応する著者

研究成果: Article査読

98 被引用数 (Scopus)

抄録

The micro-Raman spectra of a double-layer light-emitting diode fabricated with poly(3,4-ethylenedioxythiophene)-poly(4-styrenesulfonate) (PEDOT-PSS) as a hole-injection layer and poly(2,7-(9,9-dioctylfluorene)-alt-benzothiadiazole) (F8BT) blended with poly(9,9-dioctylfluorene) (PF8) as an emissive layer have been measured with excitation at 633 nm. After the operation of the device, the intensities of the bands due to PEDOT have increased. These increases in Raman intensity have been attributed to the reduction (dedoping) of PEDOT chains during operation on the basis of the results of electrochemical oxidation and reduction of a PEDOT-PSS film. The reduction of PEDOT chains is most likely one of the intrinsic factors of the degradation of polymer light-emitting diodes.

本文言語English
ページ(範囲)395-398
ページ数4
ジャーナルChemical Physics Letters
412
4-6
DOI
出版ステータスPublished - 2005 9月 5

ASJC Scopus subject areas

  • 物理学および天文学(全般)
  • 物理化学および理論化学

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