Contribution of TADF and exciplex emission for efficient "warm-white" OLEDs

Описание

Тип публикации: статья из журнала

Год издания: 2018

Идентификатор DOI: 10.1039/c7tc05392d

Аннотация: The bicarbazole derivative 4,4′-(9H,9′H-[3,3′-bicarbazole]-9,9′-diyl)bis(3-(trifluoromethyl)benzonitrile), denoted as pCNBCzoCF3, was synthesized and tested for white OLED applications. pCNBCzoCF3 demonstrated an extremely small value of the singlet-triplet energy gap that caused intensive thermally activated delayed fluorescence (Показать полностьюTADF). In addition, this compound is able to form exciplex-type excited states at the interface with star-shaped 4,4′,4′′-tris[phenyl(m-tolyl)amino]triphenylamine (m-MTDATA). Combining the TADF emission of pCNBCzoCF3 with the exciplex emission from the pCNBCzoCF3/m-MTDATA interface, we fabricated a number of highly efficient "warm-white" OLEDs, the electroluminescence of which was close to candle emission. The best device demonstrated a very high brightness of 40900 Cd m-2 (at 15 V), current efficiency of 53.8 Cd A-1 and power efficiency of 19.3 lm W-1, while the external quantum efficiency reached 18.8%. The fabricated devices demonstrated high emission characteristics even for the standard test at 1000 Cd m-2 (current efficiency of 46.2 Cd A-1, power efficiency of 10.6 lm W-1, EQE of 17.0%). © 2018 The Royal Society of Chemistry.

Ссылки на полный текст

Издание

Журнал: Journal of Materials Chemistry C

Выпуск журнала: Vol. 6, Is. 6

Номера страниц: 1543-1550

ISSN журнала: 20507534

Издатель: Royal Society of Chemistry

Авторы

  • Grybauskaite-Kaminskiene G. (Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Plentas 19, Kaunas, Lithuania)
  • Ivaniuk K. (Lviv Polytechnic National University, S. Bandera 12, Lviv, Ukraine)
  • Bagdziunas G. (Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Plentas 19, Kaunas, Lithuania)
  • Turyk P. (Lviv Polytechnic National University, S. Bandera 12, Lviv, Ukraine)
  • Stakhira P. (Lviv Polytechnic National University, S. Bandera 12, Lviv, Ukraine)
  • Baryshnikov G. (Division of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology, Stockholm, Sweden, Bohdan Khmelnytsky National University, Shevchenko 81, Cherkassy, Ukraine)
  • Volyniuk D. (Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Plentas 19, Kaunas, Lithuania)
  • Cherpak V. (School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, United States)
  • Minaev B. (Division of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology, Stockholm, Sweden, Bohdan Khmelnytsky National University, Shevchenko 81, Cherkassy, Ukraine)
  • Hotra Z. (Lviv Polytechnic National University, S. Bandera 12, Lviv, Ukraine, Rzeszów University of Technology, W. Pola 2, Rzeszów, Poland)
  • Ågren H. (Division of Theoretical Chemistry and Biology, School of Biotechnology, KTH Royal Institute of Technology, Stockholm, Sweden, Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Svobodny pr. 79, Russian Federation)
  • Grazulevicius J.V. (Department of Polymer Chemistry and Technology, Kaunas University of Technology, Radvilenu Plentas 19, Kaunas, Lithuania)

Вхождение в базы данных

  • Scopus (цитирований 3)