Diamond-like carbon as a buffer layer in polymeric electroluminescent device

Sang Hun Choi, Soon Moon Jeong, Won Hoe Koo, Sung Jin Jo, Hong Koo Baik, Se Jong Lee, Kie Moon Song, Dong Won Han

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14 Citations (Scopus)

Abstract

Diamond-like carbon (DLC) layer was deposited by the Cs+ ion sputtered negative ion deposition technique between hole transport layer and indium tin oxide (ITO) anode for polymeric electroluminescent device. An acidic poly(styrene sulfonate)-doped poly(3,4-ethylene dioxythiophene):poly- (styrenesulphonic acid) (PEDOT:PSS) solution acting as a hole transporting material etches the ITO surface and the PEDOT:PSS/ITO interface is not stable. X-ray photoelectron spectroscopy and Rutherford backscattering spectrometry have been used to measure the indium contamination in the organic layers such as PEDOT:PSS and poly[2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylene vinylene]. From the result, it was found that the DLC buffer layer protects ITO surface from acidic PEDOT:PSS solution and restrains the indium diffusion into organic layer. The device with the DLC layer also has electroluminescent efficiency by almost 2 times in the polymeric electroluminescent device compared with the device without diamond-like carbon layer.

Original languageEnglish
Pages (from-to)351-357
Number of pages7
JournalThin Solid Films
Volume483
Issue number1-2
DOIs
Publication statusPublished - 2005 Jul 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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    Choi, S. H., Jeong, S. M., Koo, W. H., Jo, S. J., Baik, H. K., Lee, S. J., Song, K. M., & Han, D. W. (2005). Diamond-like carbon as a buffer layer in polymeric electroluminescent device. Thin Solid Films, 483(1-2), 351-357. https://doi.org/10.1016/j.tsf.2004.12.040