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Horizontal Molecular Orientation in Vacuum-Deposited Organic Amorphous Films

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WOLEDs and Organic Photovoltaics

Part of the book series: Green Energy and Technology ((GREEN))

Abstract

Organic amorphous films fabricated by vacuum deposition have been used as essential components in organic light-emitting diodes (OLEDs) because they have the advantages of nanometer-scale surface smoothness and easy controllability of thickness. However, molecular orientation in organic amorphous films has been disregarded for the past 20 years since the beginning of the research on OLEDs. Here, we demonstrate horizontal molecular orientation in neat and doped organic amorphous films and show the general relationship between molecular structures and the molecular orientation. It was found that when molecular structure is linear or planar, the anisotropy of the molecular orientation in films becomes generally large. The results show the vital importance of the horizontal molecular orientation to understand the light emission and the carrier transport in OLEDs. To elucidate the device physics in OLEDs, the molecular orientation in amorphous films should generally be taken into consideration.

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References

  1. Tang CW, VanSlyke SA (1987) Appl Phys Lett 51:913–915

    Article  CAS  Google Scholar 

  2. Kozlov VG, Bulovic V, Burrows PE et al (1998) J Appl Phys 84:4096–4108

    Article  CAS  Google Scholar 

  3. Baldo MA, Holmes RJ, Forrest SR (2002) Phys Rev B 66:035321

    Article  Google Scholar 

  4. Tsutsui T, Aminaka E, Lin CP et al (1997) Philos Trans R Soc Lond A 355:801–804

    Article  CAS  Google Scholar 

  5. Gu G, Garbuzov DZ, Burrows PE et al (1997) Opt Lett 22:396–398

    Article  CAS  Google Scholar 

  6. Kim JS, Ho PKH, Greenham NC (2000) J Appl Phys 88:1073–1081

    Article  CAS  Google Scholar 

  7. Fujiwara H (2007) Spectroscopic ellipsometry: principles and applications. Wiley, New York

    Google Scholar 

  8. Miller EK, McGehee MD, Diaz-Garcia M et al (1999) Synth Met 102:1091–1092

    Article  CAS  Google Scholar 

  9. Ramsdale CM, Greenham NC (2002) Adv Mater 14:212–215

    Article  CAS  Google Scholar 

  10. Losurdo M, Giangregorio MM, Capezzuto P et al (2003) Synth Met 138:49–53

    Article  CAS  Google Scholar 

  11. Winfield JM, Donley CL, Kim JS (2007) J Appl Phys 102:063505

    Article  Google Scholar 

  12. Lin HW, Lin CL, Chang HH et al (2004) J Appl Phys 95:881–886

    Article  CAS  Google Scholar 

  13. Lin HW, Lin CL, Wu CC et al (2007) Org Electron 8:189

    Article  CAS  Google Scholar 

  14. Marcuse D (1991) Theory of dielectric optical waveguides, 2nd revised edn. Academic, San Diego

    Google Scholar 

  15. Peng X, Liu L, Wu J et al (2000) Opt Lett 25:314–316

    Article  CAS  Google Scholar 

  16. Sheridan AK, Turnbull GA, Safonov AN et al (2000) Phys Rev B 62:R11929–R11932

    Article  CAS  Google Scholar 

  17. Kawase T, Pinner DJ, Friend RH et al (2000) Synth Met 111–112:583–586

    Article  Google Scholar 

  18. Pauchard M, Vehse M, Swensen J et al (2003) J Appl Phys 94:3543–3548

    Article  CAS  Google Scholar 

  19. Li F, Solomesch O, Mackie PR et al (2006) J Appl Phys 99:013101

    Article  Google Scholar 

  20. Yim KH, Friend RH, Kim JS (2006) J Chem Phys 124:184706

    Article  Google Scholar 

  21. Nakanotani H, Adachi C, Watanabe S et al (2007) Appl Phys Lett 90:231109

    Article  Google Scholar 

  22. Yokoyama D, Sakaguchi A, Suzuki M et al (2009) Org Electron 10:127–137

    Article  CAS  Google Scholar 

  23. Yokoyama D, Sakaguchi A, Suzuki M et al (2008) Appl Phys Lett 93:173302

    Article  Google Scholar 

  24. Aimono T, kawamura K, Goushi K et al (2005) Appl Phys Lett 86:071110

    Article  Google Scholar 

  25. Synowicki RA, Tiwald TE (2004) Thin Solid Films 455–456:248–255

    Article  Google Scholar 

  26. Jellison GE Jr (1993) Thin Solid Films 234:416–422

    Article  CAS  Google Scholar 

  27. Saleh BEA, Teich MC (1991) Fundamentals of photonics. Wiley, New York

    Book  Google Scholar 

  28. Ward IM (1975) Structure and properties of oriented polymers. Applied Science, London

    Google Scholar 

  29. Aonuma M, Oyamada T, Sasabe H et al (2007) Appl Phys Lett 90:183503

    Article  Google Scholar 

  30. Fox TG Jr, Flory PJ (1950) J Appl Phys 21:581

    Article  CAS  Google Scholar 

  31. Ichikawa M, Kawaguchi T, Kobayashi K et al (2006) J Mater Chem 16:221

    Article  CAS  Google Scholar 

  32. Ichikawa M, Hiramatsu N, Yokoyama N et al (2007) Phys Stat Sol (RRL) 1:R37

    Article  CAS  Google Scholar 

Download references

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Authors and Affiliations

  1. Graduate School of Science and Engineering, Yamagata University, 4-3-16 Johnan, Yonezawa, Yamagata, 992-8510, Japan

    Daisuke Yokoyama

  2. Center for Organic Photonics and Electronics Research (OPERA) / Center for Future Chemistry, Kyushu University, 744 Motooka, Nishi, Fukuoka, 819-0395, Japan

    Chihaya Adachi

Authors
  1. Daisuke Yokoyama
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  2. Chihaya Adachi
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Corresponding authors

Correspondence to Daisuke Yokoyama or Chihaya Adachi .

Editor information

Editors and Affiliations

  1. Dept. Chemistry, University of Hong Kong, Pokfulam Road, Hong Kong, Hong Kong/PR China

    Vivian W. W. Yam

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Yokoyama, D., Adachi, C. (2010). Horizontal Molecular Orientation in Vacuum-Deposited Organic Amorphous Films. In: Yam, V. (eds) WOLEDs and Organic Photovoltaics. Green Energy and Technology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-14935-1_5

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  • DOI: https://doi.org/10.1007/978-3-642-14935-1_5

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-14934-4

  • Online ISBN: 978-3-642-14935-1

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