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===PLED===
[[Image:Lep partfail.jpg|thumb|LEP display showing partial failure]]▼
'''Polymer light-emitting diodes''' (PLED) involve an [[electroluminescence|electroluminescent]] [[conductive polymer]] that emits [[light]] when subjected to an [[electric current]]. Developed by Cambridge Display Technology, they are also known as Light-Emitting Polymers (LEP). They are used as a [[thin film]] for [[full-spectrum]] color displays and require a relatively small amount of power for the light produced. No vacuum is required, and the emissive materials can be applied on the [[substrate (printing)|substrate]] by a technique derived from commercial [[inkjet printer|inkjet]] printing.<ref>T. R. Hebner, C. C. Wu, D. Marcy, M. H. Lu & J. C. Sturm, Appl. Phys. Lett. 72, 519 (1998)</ref><ref>J. Bharathan & Y. Yang, Appl. Phys. Lett. 72, 2660 (1998)
</ref> The substrate used can be flexible, such as [[Polyethylene terephthalate|PET]].<ref>G. Gustafsson, Y. Cao, G. M. Treacy, F. Klavetter, N. Colaneri & A. J. Heeger, Nature 357, 477 (1992)</ref> Thus, flexible PLED Displays may be produced inexpensively.
Typical polymers used in PLED displays include derivatives of [[poly(p-phenylene vinylene)]] and [[Fluorene|poly(fluorene)]]. [[Substitution (chemistry)|Substitution]] of side chains onto the polymer backbone may determine the color of emitted light<ref>AJ Heeger, in Conjugated Polymers and Related Materials, (eds. WR Salaneck, I Lundstrom, B Ranby), p.27-62, Oxford 1993</ref> or the stability and solubility of the polymer for performance and ease of processing.<ref>R Kiebooms, R Menon & K Lee, in Handbook of Advanced Electronic and Photonic Materials and Devices Volume 8 (ed. HS Nalwa), p.1-86, Academic Press 2001</ref>
▲[[Image:Lep partfail.jpg|thumb|LEP display showing partial failure]]
===TOLED===
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