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Degradation of organic light-emitting diodes based on different-ligand complexes of terbium (III) salicylate and 2-phenoxybenzoate

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Abstract

Degradation (D) of organic light-emitting diodes (OLEDs) based on new different-ligand complexes of terbium salicylate (Tb(Sal)3(TPPO)2) and 2-phenoxybenzoate (Tb(pobz)3(TPPO)2) with triphenyl phosphinoxide (TPPO) was studied. Initial reversible D is associated with charge carrier trap filling. A temperature increase, applied stress relief, and short-term irradiation with UV light lead to trapped charge carrier release and electroluminescence (EL) intensity recovery. During strong heating, irreversible D is observed after the recovery; this D requires in addition an electric field (EF). Intense UV light causes D without EF. The use of ac bias voltage eliminates reversible D, and sealing retards irreversible long-term D.

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Authors and Affiliations

  1. Physico-Technical Institute, Institutsky per. 9, Dolgoprudnyi, Moscow Oblast, 141700, Russia

    A. A. Vashchenko

  2. Lomonosov State University, Vorobievy Gory, Moscow, 119899, Russia

    S. V. Eliseeva, O. V. Kotova & N. P. Kuzmina

Authors
  1. L. S. Lepnev
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  2. A. A. Vashchenko
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  3. A. G. Vitukhnovskii
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  4. S. V. Eliseeva
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  5. O. V. Kotova
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  6. N. P. Kuzmina
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Additional information

Original Russian Text © L.S. Lepnev, A.A. Vashchenko, A.G. Vitukhnovskii, S.V. Eliseeva, O.V. Kotova, N.P. Kuzmina, 2007, published in Kratkie Soobshcheniya po Fizike, 2007, Vol. 34, No. 4, pp. 12–20.

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Lepnev, L.S., Vashchenko, A.A., Vitukhnovskii, A.G. et al. Degradation of organic light-emitting diodes based on different-ligand complexes of terbium (III) salicylate and 2-phenoxybenzoate. Bull. Lebedev Phys. Inst. 34, 102–106 (2007). https://doi.org/10.3103/S1068335607040021

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  • DOI: https://doi.org/10.3103/S1068335607040021

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