DOI: 10.1063/1.1391215. Polymer light-emitting devices using ionomers as an electron injecting and hole blocking layer

Polymer light-emitting devices using ionomers as an electron injecting and hole blocking layer

10.1063/1.1391215

Crossref journal-article

AIP Publishing

Journal of Applied Physics (317)

Abstract

The effect of ion concentration, neutralization level and counterions in ionomers was systematically studied to obtain the optimal electroluminescent (EL) characteristics in polymer light-emitting diodes using poly[2-methoxy-5-(2′-ethyl-hexyloxy)-1,4-phenylenevinylene] (MEH-PPV) for the emissive layer and sulfonated polystyrene (SPS) ionomers for the electron-injecting layer. The optimum ion concentration of NaSPS was determined to be at 6.7 mol %. Ionomers with a higher neutralization level make the EL device more efficient, with the highest efficiency being at 200% overneutralization. The ionomer with a smaller metal counter ion greatly enhances the efficiency of EL devices with the indium–tin–oxide/MEH-PPV/LiSPS/Al device having the highest EL quantum efficiency, 1.18% photons/electron. The dominant factor in enhancing the luminance is the number of ionic dipoles near the cathode irrespective of the type of metal counterions, while the hole blocking mostly depends on the restriction of chain segmental motion in ionomers.

Bibliography

Lee, T.-W., Park, O. O., Do, L.-M., Zyung, T., Ahn, T., & Shim, H.-K. (2001). Polymer light-emitting devices using ionomers as an electron injecting and hole blocking layer. Journal of Applied Physics, 90(5), 2128â2134.

Authors 6

Tae-Woo Lee (first)
O Ok Park (additional)
Lee-Mi Do (additional)
Taehyoung Zyung (additional)
Taek Ahn (additional)
Hong-Ku Shim (additional)

References 24 Referenced 55

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 10:18 a.m.)
Deposited	1 year, 6 months ago (Feb. 10, 2024, 10:03 a.m.)
Indexed	1 year, 2 months ago (May 30, 2024, 12:29 a.m.)
Issued	23 years, 11 months ago (Sept. 1, 2001)
Published	23 years, 11 months ago (Sept. 1, 2001)
Published Print	23 years, 11 months ago (Sept. 1, 2001)

Funders 0

None

BibTeX

@article{Lee_2001, title={Polymer light-emitting devices using ionomers as an electron injecting and hole blocking layer}, volume={90}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1391215}, DOI={10.1063/1.1391215}, number={5}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Lee, Tae-Woo and Park, O Ok and Do, Lee-Mi and Zyung, Taehyoung and Ahn, Taek and Shim, Hong-Ku}, year={2001}, month=sep, pages={2128–2134} }

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