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Polymer light-emitting diodes based on poly(3-hexyl thiophene)

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Abstract

Poly(3-hexyl thiophene)(P3HT) and poly(3-dodecyl thiophene)(P3DT) were polymerized by oxidative coupling with ferric chloride. The P3HT light-emitting device emitted red light and it could be observable in the ordinary indoor light. The device had the turn-on electric field of about 3×107 V/m. The maximum electroluminescene (EL) intensity was obtained when the thickness of polymer layer was about 130 nm in ITO/P3HT/Al device. The maximum external quantum yield was 0.002%. The maximum luminance was 21 cd/m2. The EL intensity decreases with increasing the crystallinity of the polymer layer. By using the oriented poly(3-alkyl thiophene)(PAT) layer as an electroluminescent layer in the ITO/polymer/Al light-emitting devices, the polarized EL light emission was observed. The EL intensity ratio of parallel to perpendicular direction to the stretch direction for P3HT was about 1.40.

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Authors and Affiliations

  1. Department of Textile Engineering, Inha University, #253 Yonghyon-dong, 402-751, Nam-gu, Incheon, Korea

    Chang Seoul & Nam-Hee Kim

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  1. Chang Seoul
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  2. Nam-Hee Kim
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Correspondence to Chang Seoul.

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Seoul, C., Kim, NH. Polymer light-emitting diodes based on poly(3-hexyl thiophene). Fibers Polym 1, 25–31 (2000). https://doi.org/10.1007/BF02874873

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  • DOI: https://doi.org/10.1007/BF02874873

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