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Low Molecular Weight Materials: Dry Processing

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Handbook of Organic Light-Emitting Diodes

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Abstract

In the development of light-emitting materials for OLEDs, the main issue is to design light-emitting materials that can achieve a balance between high efficiency for low power consumption, color gamut expansion, and device lifetime. At present, triplet-triplet fusion methods of fluorescent emitters, phosphorescent emitters, and thermally activated delayed fluorescent emitters (TADFs) are mainly being developed as they have the potential to meet the requirements.

In this chapter, phosphorescent materials based on transition metal complexes will be discussed. The required properties for OLED emitters are reviewed, and design rules based on the luminescence mechanism of transition metal complexes are discussed. Finally, key investigations related to phosphorescent emitter materials will be reviewed, with emphasis on the most challenging blue emitting materials.

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References

  • Adachi C, Baldo MA, Forrest SR, Lamansky S, Thompson ME, Kwong RC (2001a) High-efficiency red electrophosphorescence devices. Appl Phys Lett 78(11):1622. https://doi.org/10.1063/1.1355007

    Article  ADS  Google Scholar 

  • Adachi C, Kwong RC, Djurovich P, Adamovich V, Baldo MA, Thompson ME, Forrest SR (2001b) Endothermic energy transfer: a mechanism for generating very efficient high-energy phosphorescent emission in organic materials. Appl Phys Lett 79(13):2082–2084. https://doi.org/10.1063/1.1400076

    Article  ADS  Google Scholar 

  • Baldo MA, O’Brien DF, You Y, Shoustikov A, Sibley S, Thompson ME, Forrest SR (1998) Highly efficient phosphorescent emission from organic electroluminescent devices. Nature 395(6698):151–154. https://doi.org/10.1038/25954

    Article  ADS  Google Scholar 

  • Baldo MA, Lamansky S, Burrows PE, Thompson ME, Forrest SR (1999) Very high-efficiency green organic light-emitting devices based on electrophosphorescence. Appl Phys Lett 75(1):4. https://doi.org/10.1063/1.124258

    Article  ADS  Google Scholar 

  • Diouf B, Jeon WS, Pode R, Kwon JH (2012) Efficiency control in iridium complex-based phosphorescent light-emitting diodes. Adv Mater Sci Eng .Figure 1. https://doi.org/10.1155/2012/794674

  • Endo A, Suzuki K, Yoshihara T, Tobita S, Yahiro M, Adachi C (2008) Measurement of photoluminescence efficiency of Ir(III) phenylpyridine derivatives in solution and solid-state films. Chem Phys Lett 460(1–3):155–157. https://doi.org/10.1016/j.cplett.2008.05.064

    Article  ADS  Google Scholar 

  • Flämmich M, Frischeisen J, Setz DS, Michaelis D, Krummacher BC, Schmidt TD, … Danz N (2011) Oriented phosphorescent emitters boost OLED efficiency. Org Electron Phys Mater Appl 12(10):1663–1668. https://doi.org/10.1016/j.orgel.2011.06.011

  • Hartmut Y (2008) Highly efficient OLEDs with phosphorescent materials (ed: Yersin H). Wiley. Retrieved from https://books.google.com/books?id=-A9sAIr4CWUC&pgis=1

  • Holmes RJ, D’Andrade BW, Forrest SR, Ren X, Li J, Thompson ME, … Thompson ME (2003) Efficient, deep-blue organic electrophosphorescence by guest charge trapping. Appl Phys Lett 83(18):3818–3820. https://doi.org/10.1063/1.1624639

  • Holmes RJ, Forrest SR, Sajoto T, Tamayo A, Djurovich PI, Thompson ME, … Brown JJ (2005) Saturated deep blue organic electrophosphorescence using a fluorine-free emitter. Appl Phys Lett 87(24):1–3. https://doi.org/10.1063/1.2143128

  • Kawamura Y, Goushi K, Brooks J, Brown JJ, Sasabe H, Adachi C (2005) 100% phosphorescence quantum efficiency of Ir(III) complexes in organic semiconductor films. Appl Phys Lett 86(7):071104. https://doi.org/10.1063/1.1862777

    Article  ADS  Google Scholar 

  • Kim DH, Cho NS, Oh H-Y, Yang JH, Jeon WS, Park JS, … Kwon JH (2011) Highly efficient red phosphorescent dopants in organic light-emitting devices. Adv Mater 23(24):2721–2726. https://doi.org/10.1002/adma.201100405

  • Kim K-H, Lee S, Moon C-K, Kim S-Y, Park Y-S, Lee J-H, … Kim J-J (2014) Phosphorescent dye-based supramolecules for high-efficiency organic light-emitting diodes. Nat Commun 5:4769. https://doi.org/10.1038/ncomms5769

  • Lamansky S, Djurovich P, Murphy D, Abdel-Razzaq F, Lee H-E, Adachi C, … Thompson ME (2001) Highly phosphorescent Bis-Cyclometalated iridium complexes: synthesis, photophysical characterization, and use in organic light emitting diodes. J Am Chem Soc 123(18):4304–4312. https://doi.org/10.1021/ja003693s

  • Lee SJ, Park K-M, Yang K, Kang Y (2009) Blue phosphorescent Ir(III) complex with high color purity: fac-tris(2′,6′-difluoro-2,3′-bipyridinato-N,C(4′))iridium(III). Inorg Chem 48(3):1030–1037. https://doi.org/10.1021/ic801643p

    Article  Google Scholar 

  • Lee J, Chen H-F, Batagoda T, Coburn C, Djurovich PI, Thompson ME, Forrest SR (2015) Deep blue phosphorescent organic light-emitting diodes with very high brightness and efficiency. Nat Mater 1–8. https://doi.org/10.1038/nmat4446

  • Li J, Djurovich PI, Alleyne BD, Yousufuddin M, Ho NN, Thomas JC, … Thompson ME (2005) Synthetic control of excited-state properties in cyclometalated Ir(III) complexes using ancillary ligands. Inorg Chem 44(6):1713–27. https://doi.org/10.1021/ic048599h

  • Lo S-C, Shipley CP, Bera RN, Harding RE, Cowley AR, Burn PL, Samuel IDW (2006) Blue phosphorescence from iridium(III) complexes at room temperature. Chem Mater 18(21):5119–5129. https://doi.org/10.1021/cm061173b

    Article  Google Scholar 

  • Marco M, Credi A, Prodi L, Gandolfi MT (2006) Handbook of photochemistry, 3rd edn. CRC Press. Book. Retrieved from https://www.crcpress.com/Handbook-of-Photochemistry-Third-Edition/Montalti-Credi-Prodi-Gandolfi/9780824723774

  • Sajoto T, Djurovich PI, Tamayo A, Yousufuddin M, Bau R, Thompson ME, … Forrest SR (2005) Blue and near-UV phosphorescence from iridium complexes with cyclometalated pyrazolyl or N-heterocyclic carbene ligands. Inorg Chem 44(22):7992–8003. https://doi.org/10.1021/ic051296i

  • Sajoto T, Djurovich PI, Tamayo AB, Oxgaard J, Goddard WA, Thompson ME (2009) Temperature dependence of blue phosphorescent cyclometalated Ir(III) complexes. J Am Chem Soc 131(28):9813–9822. https://doi.org/10.1021/ja903317w

  • Sasabe H, Takamatsu J, Motoyama T, Watanabe S, Wagenblast G, Langer N, … Kido J (2010) High-efficiency blue and white organic light-emitting devices incorporating a blue iridium Carbene complex. Adv Mater 22(44):5003–5007. https://doi.org/10.1002/adma.201002254

  • Tamayo AB, Alleyne BD, Djurovich PI, Lamansky S, Tsyba I, Ho NN, … Thompson ME (2003) Synthesis and characterization of facial and meridional tris-cyclometalated iridium(III) complexes. J Am Chem Soc 125(24):7377–87. https://doi.org/10.1021/ja034537z

  • Tanaka D, Sasabe H, Li Y-J, Su S-J, Takeda T, Kido J (2007) Ultra high efficiency green organic light-emitting devices. Jpn J Appl Phys Part 2 Lett Express Lett 46(1–3):L10–L12. https://doi.org/10.1143/JJAP.46.L10

    Article  Google Scholar 

  • Tsuboyama A, Iwawaki H, Furugori M, Mukaide T, Kamatani J, Igawa S, … Ueno K (2003) Homoleptic cyclometalated iridium complexes with highly efficient red phosphorescence and application to organic light-emitting diode. J Am Chem Soc 125(42):12971–12979. https://doi.org/10.1021/ja034732d

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Authors and Affiliations

  1. Konica Minolta, Inc, Tokyo, Japan

    Satoru Inoue, Hiroto Itou & Hiroshi Kita

Authors
  1. Satoru Inoue
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  2. Hiroto Itou
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  3. Hiroshi Kita
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Corresponding author

Correspondence to Satoru Inoue .

Editor information

Editors and Affiliations

  1. Department of Applied Chemistry and Biochemistry, Kyushu University, Fukuoka, Japan

    Chihaya Adachi

  2. Art, Science and Technology Center for Cooperative Research, Kyushu University KASTEC, Fukuoka, Japan

    Reiji Hattori

  3. Institute for Chemical Research Division of Environmental Chemistry, Kyoto University, Kyoto, Japan

    Hironori Kaji

  4. Konica Minolta Pioneer OLED, Inc., Konica Minolta, Inc., Tokyo, Japan

    Takatoshi Tsujimura

Section Editor information

  1. Division of Environmental Chemistry, Institute for Chemical Research, Kyoto University, Kyoto, Japan

    Hironori Kaji

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Inoue, S., Itou, H., Kita, H. (2021). Low Molecular Weight Materials: Dry Processing. In: Adachi, C., Hattori, R., Kaji, H., Tsujimura, T. (eds) Handbook of Organic Light-Emitting Diodes. Springer, Tokyo. https://doi.org/10.1007/978-4-431-55761-6_6-1

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  • DOI: https://doi.org/10.1007/978-4-431-55761-6_6-1

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  • Publisher Name: Springer, Tokyo

  • Print ISBN: 978-4-431-55761-6

  • Online ISBN: 978-4-431-55761-6

  • eBook Packages: Springer Reference Physics and AstronomyReference Module Physical and Materials ScienceReference Module Chemistry, Materials and Physics

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