İzopropanol katkılı Poli (3,4-etilen dioksitiyofen): poli (stirensülfonat) 'ın organik ışık yayan diyotların emisyon özellikleri üzerindeki etkisi

Öz

Pozitif yük taşıyıcılar (boşluk) enjekte eden tabaka olarak kullanılan izopropanol (IPA) katkılı Poli (3,4-etilen dioksitiyofen): poli (stirensülfonat) (PEDOT: PSS) içeren polimer bazlı organik ışık yayan cihazların (OLED) performans araştırılmıştır. Bu çalışmada, PEDOT:PSS ince filmlerindeki morfolojik değişiklikler atomik kuvvet mikroskopisi (AFM) ile analiz edilmiştir. Katkılı PEDOT:PSS ile OLED aygıt performansı sonuçları katkısız PEDOT:PSS OLED aygıtı ile karşılaştırılmıştır. Konsantrasyon 1: 1 (PEDOT: PSS - IPA) ile üretilen OLED aygıt, neredeyse 8000 cd / m2 parlaklık ve 1.75 cd / A verimliliği ile diğerleri arasında en iyi performansı göstermiştir. Ek olarak, literatürde önerilen IPA doping mekanizmalarının etkisi araştırılmıştır.

Anahtar Kelimeler

• Organik ışık yayan diyotlar
• PEDOT: PSS
• boşluk iletim tabakası
• IPA

Effect of isopropanol doped Poly(3,4-ethylene dioxythiophene): poly(styrenesulfonate) on emission characteristics of organic light emitting diodes

Öz

The performance of polymer based organic light-emitting devices (OLEDs) that contained isopropanol (IPA) doped poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) utilized as positive charge carriers (hole) injecting electrode were investigated. In this study, morphological changes in PEDOT:PSS thin films have been analyzed with atomic force microscopy (AFM). The results of device performance with doped PEDOT:PSS were compared with the result of non doped PEDOT:PSS device. Fabricated OLED with the concentration 1:1 (PEDOT:PSS to IPA) shows the best performance among the others with almost 8000 cd/m2 brightness and 1.75 cd/A efficiency. Additionally, effect of IPA doping mechanisms proposed in the literature have been surveyed.

Anahtar Kelimeler

• Organic light emitting diodes
• PEDOT:PSS
• hole injection layer
• IPA

Kaynakça

1. Elschner A., Kirchmeyer S., Lövenich W., Merker U., Reuter K., PEDOT: Principles and Applications of an Intrinsically Con-ductive Polymer, CRC Press: Boca Raton, FL, USA, (2010)
2. Jonas F., Heywang G., Werner S., Novel Polythiophenes, Process for Their Preparation, and Their Use, Patent DE 3813589A1, (1988).
3. Heywang G., Jonas F., Poly(alkylenedioxythiophene)s-new, very stable conducting polymers, Advanced Materials, 4, 116-118, (1992).
4. Randriamahazaka H., Noel V., Chevrot C., Nucleation and growth of poly(3,4-ethylenedioxythiophene) in acetonitrile on platinum under potentiostatic conditions, Journal of Electroanalytical Chemistry, 472, 103–111, (1999).
5. Cao Y., Yu G., Zhang C., Menon R., Heeger A.J., Polymer light-emitting diodes with polyethylene dioxythiophene-polystyrene sulfonate as the transparent anode, Synthetic Metals, 87,171-174, (1997).
6. Scott J.C., Carter S.A., Karg S., Angelopoulos M., Polymeric anodes for organic light-emitting diodes, Synthetic Metals, 85, 1197-1200, (1997).
7. Burn P.L., Bradley D.D.C., Brown A.R., Friend R.H., Halliday D.A, Holmes A.B., Kraft A., Martens J.H.F., Control of Electronic and Physical Structure Through Modification of the Synthesis and Processing in Precursor-Route Poly(arylene vinylene) Polymers, Springer, Series in Solid State Sciences, Electronic Properties of Polymers 107, 293, (1992).
8. Bradley D.D.C., Burn P.L., Friend R.H., Holmes A.B., Kraft A., Electronic Properties of Conjugated Polymers, IV. Springer Series in Solid State Sciences, 107, 304, (1992).

9. Kugler T., Salaneck W.R., Rost H., Holmes A.B., Polymer band alignment at the interface with indium tin oxide: consequences for light emitting devices, Chemical Physics Letters, 310, 391-396, (1999).
10. Groenendaal L., Jonas F., Freitag D., Pielartzik H., Reynolds J.R., Poly(3,4‐ethylenedioxythiophene) and its Derivatives: Past, Present, and Future, Advanced Materials, 12, 481, (2000).
11. Sun K., Zhang S., Li P., Xia Y., Zhang X., Du D., F. Isikgor H., Ouyang J., Review on application of PEDOTs and PEDOT:PSS in energy conversion and storage devices, Journal of Materials Science: Materials in Electronics, 26,4438-4462, (2015).
12. Pettersson L. A. A., Ghosh S., Inganas O., Optical anisotropy in thin films of poly (3, 4-ethylenedioxythiophene)- poly (4-styrenesulfonate), Organic Electronics, 3, 143-148, (2002).
13. Ghosh S., Inganas O., Nano-structured conducting polymer network based on PEDOT-PSS, Synthetic Metals, 121, 1321-1322, (2001).
14. Zhang F., Johansson M., Andersson M. R., Hummelen J. C., Inganas O., Polymer photovoltaic cells with conducting polymer anodes, Advanced Materials, 14, 662-665, (2002).
15. Kim J. Y., Jung J. H., Lee D.E., Joo J., Enhancement of electrical conductivity of poly (3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) by a change of solvents, Synthetic Metals, 126, 311-316, (2002).
16. Lee C.S., Kim J.Y., Lee D.E., Koo Y.K., Joo J., Han S., Beag Y.W., Koh S.K., Organic based flexible speaker through enhanced conductivity of PEDOT/PSS with various solvents, Synthetic Metals, 135, 13-14, (2003).
17. Jonsson S. K. M., Birgerson J., Crispin X., Greczynski G., Osikowicz W., vander Gon A. W. D., Salaneck W. R., Fahlman M., The effects of solvents on the morphology and sheet resistance in poly(3,4‐ethylenedioxythiophene)–polystyrenesulfonic acid (PEDOT - PSS) films, Synthetic Metals, 139, 1-10, (2003).
18. Kim, W. H., Makinen, A. J., Nikolov, N., Shashidhar, R., Kim, H., Kafafi, Z. H., Molecular organic light-emitting diodes using highly conducting polymers as anodes, Applied Physics Letters, 80, 3844–3846, (2002).
19. Ha Y.-H., Nikolov N., Pollack S.K., Mastrangelo J., Martin B.D., Shashidhar R., Towards a Transparent, Highly Conductive Poly(3,4‐ethylenedioxythiophene), Advanced Functional Materials, 14, 615–622,(2004).
20. Luo J., Billep D., Waechtler T., Otto T., Toader M., Gordan O., Sheremet E., Martin J., Hietschold M., Zahn D.R., Enhancement of the thermoelectric properties of PEDOT: PSS thin films by post-treatment, Journal of Materials Chemistry A, 1 7576-7583, (2013).
21. Allcock H. R., Lampe F. W., Contemporary Polymer Chemistry, Prentice Hall: EnglewoodCliffs, NJ, 2nd ed., 553, (1990).
22. Gelbard G., Organic Synthesis by Catalysis with Ion-Exchange Resins, Industrial & Engineering Chemistry Research, 44, 8468-8498, (2005).
23. Sharma M. M., Some novel aspects of cationic ion-exchange resins as catalysts, Reactive and Functional Polymers, 26,3, (1995).
24. Akelah A., The use of functionalized polymers as polymeric reagents in solid phase organic synthesis: A review, Reactive Polymers, Ion Exchangers, Sorbents, 8, 273-284, (1988).
25. Czarnik A. W., DeWitt S. H., A Practical Guide to Combinatorial Chemistry, Eds. American Chemical Society: Washington, DC, (1997).
26. Chaiken I. N., Janda K. D. , Molecular Diversity and Combinatorial Chemistry Libraries and Drug Discovery, Eds.; American Chemical Society:Washington, DC, 1996.
27. Balkenhol F., vondem Bussche-Hünnefeld C., Lansky A., Zechel C., Combinatorial Synthesis of Small Organic Molecules, Angewandte Chemie International Edition, 35, 2289, (1996).
28. Thompson L. A., Ellman J. A., Synthesis and Applications of Small Molecule Libraries, Chemical Reviews, 96, 555-600, (1996).
29. Pavia M. R., Sawyer T. K., Moos W. H., Bioorg Med Chem Lett, 3, 387-396, (1993).
30. D’angelo J. G., Sawyer R., Kumar A., Onorato A., Mccluskey C., Delude C., Vollenweider L., Reyes N., French R., Warner S., Chou J., Stenzel J., Sotzing G. A., Smith M. B., Chemical Reactions of the Conducting Polymer Poly(3,4-ethylene dioxythiophene) and Alcohols, Journal of Polymer Science: Part A: Polymer Chemistry, 45, 2328-2333, (2007).
31. De Girolamo Del Mauro A., Nenna G., Villani F., Minarini C., Study of the effect of the doped poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) polymeric anode on the organic light-emitting diode performances, Thin Solid Films, 520, 5386-539, (2012).
32. Fallahzadeh A., Saghaei J., Yousefi M.H., Effect of alcohol vapor treatment on electrical and optical properties of poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) films for indium tin oxide-free organic light-emitting diodes, Applied Surface Science, 320, 895-900, (2014).
33. Havare A.K., Can M., S.Demic, Kus M., S. Icli, The performance of OLEDs based on sorbitol doped PEDOT:PSS, Synthetic Metals, 161, 2734-2738, (2012).