Ytterbium complexes with 2-tosylamino-4-bromobenzylidene-halogenbenzoyhydrazones for highly NIR emitting solution-processed OLEDs

Ytterbium complexes with 2-tosylamino-4-bromobenzylidene-halogenbenzoyhydrazones for highly NIR emitting solution-processed OLEDs Full article

Journal

Journal of Luminescence
ISSN: 1872-7883 , E-ISSN: 0022-2313

Output data

Year: 2022, Volume: 244, Article number : 118702, Pages count : DOI: 10.1016/j.jlumin.2021.118702

Authors

Fedichkina Anna D. ¹ , Koshelev Daniil S. ¹ , Vashchenko Andrey A. ² , Tcelykh Lyubov O. ³ , Goloveshkin Alexander S. ⁴ , Gontcharenko Victoria E. ³ , Latipov Egor V. ¹ , Medved'ko Alexey V. ⁵ , Vatsadze Sergey Z. ⁵ , Burlov Anatolii S. ⁶ , Utochnikova Valentina V. ¹

Affiliations

1	Faculty of the Material Science, Lomonosov Moscow State University, Moscow, 119991, Russia
2	Lebedev Physical Institute RAS, Moscow, 119992, Russia
3	Chemistry Faculty, Lomonosov Moscow State University, Moscow, 119991, Russia
4	A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, Moscow, 119991, Russia
5	Zelinsky Institute of Organic Chemistry RAS, Moscow, 119991, Russia
6	Institute of Physical and Organic Chemistry, Southern Federal University, Rostov-on-Don, 344090, Russia

Ytterbium complexes Yb(LX)(HLX) with 2-tosylamino-4-bromobenzylidene-X-benzoylhydrazones (H2LH, X = H; H2LF, X = F; H2LI, X = I) were obtained, their luminescent properties characterized. Halogenation resulted in the increase of solubility (up to 24 g/L in THF) and quantum yield (up to 1.9%). High solubility and high quantum yields resulted in successfully testing these complexes as purely NIR-emitting host-free emitting layers in OLEDs. Surprisingly, among the tested materials the highest efficiency (110 μW/W) was demonstrated by the Yb(LH)(HLH) complex with the lowest quantum yield (0.5%). This efficiency is the highest for the Yb electroluminescence by far, and it was obtained for the solution-processed OLED.

Fedichkina A.D. , Koshelev D.S. , Vashchenko A.A. , Tcelykh L.O. , Goloveshkin A.S. , Gontcharenko V.E. , Latipov E.V. , Medved'ko A.V. , Vatsadze S.Z. , Burlov A.S. , Utochnikova V.V.
Ytterbium complexes with 2-tosylamino-4-bromobenzylidene-halogenbenzoyhydrazones for highly NIR emitting solution-processed OLEDs
Journal of Luminescence. 2022. V.244. 118702 . DOI: 10.1016/j.jlumin.2021.118702 WOS OpenAlex

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