Enhanced efficiency of solution-processed lanthanide-based OLEDs via ligand engineering: Tuning excited-state lifetime and charge transport with Se-modified ligand

Enhanced efficiency of solution-processed lanthanide-based OLEDs via ligand engineering: Tuning excited-state lifetime and charge transport with Se-modified ligand Full article

Journal

Chinese Chemical Letters
ISSN: 1001-8417

Output data

Year: 2026, Volume: 37, Number: 10, Article number : 112136, Pages count : DOI: 10.1016/j.cclet.2025.112136

Authors

Guo Zhipeng ^1,2 , Gladkikh Arseny ¹ , Latipov Egor ³ , Vashchenko Andrey ⁴ , Liu Yaxuan ⁵ , Medvedko Alexey ⁶ , Goloveshkin Alexander ⁷ , Maloshitskaya Olga ⁸ , Alexandrov Alexey ⁹ , Zhou Aowei ^1,2 , Yin Yiming ^1,2 , Zhu Yanan ² , Meng Hong ^2,10 , Utochnikova Valentina ¹

Affiliations

1	Faculty of Materials Science, M. V. Lomonosov Moscow State University, Moscow 119991, Russia
2	Faculty of Materials Science, Shenzhen MSU-BIT University, Shenzhen 518172, China
3	Institute of Nanotechnology of Microelectronics of the Russian Academy of Sciences (INME RAS), Moscow 115487, Russia
4	P. N. Lebedev Physical Institute, Moscow 119992, Russia
5	Beijing Institute of Technology, Beijing 100081, China
6	N.D. Zelinsky Institute of Organic Chemistry RAS, Moscow 119991, Russia
7	A. N. Nesmeyanov Institute of Organoelement Compounds, Moscow 119334, Russia
8	Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
9	A. N. Frumkin Institute of Physical Chemistry and Electrochemistry RAS, Moscow 119071, Russia
10	School of Advanced Materials, Peking University Shenzhen Graduate School, Shenzhen 518055, China

Lanthanide complexes attract significant attention for their narrow-band emission with nearly constant wavelengths; however, developing high-efficiency lanthanide-complex organic light-emitting diode (OLED) devices and methodologies remains a primary research focus. We selected neutral ligands [1,2,5]thiadiazolo[3,4-f][1,10]phenanthroline (TDZP) and its selenium (Se)-containing counterpart, [1,2,5]selenadiazolo[3,4-f][1,10]phenanthroline (SDZP), to form complexes with dibenzoylmethane (Hdbm). Detailed investigations combining theoretical calculations and experimental data reveal synergistic effects between excited-state lifetimes and charge carrier mobility in enhancing quantum efficiency. All the devices demonstrated characteristic lanthanide ion emission, with the Eu(dbm)3SDZP-based OLED achieving remarkable electroluminescent performance: a maximum quantum efficiency (EQEmax) of 6.7 %, ranking among the highest reported values for Eu-based complex OLEDs. This integrated computational-experimental approach establishes a viable strategy for developing high-efficiency lanthanide-complex OLEDs.

Guo Z. , Gladkikh A. , Latipov E. , Vashchenko A. , Liu Y. , Medvedko A. , Goloveshkin A. , Maloshitskaya O. , Alexandrov A. , Zhou A. , Yin Y. , Zhu Y. , Meng H. , Utochnikova V.
Enhanced efficiency of solution-processed lanthanide-based OLEDs via ligand engineering: Tuning excited-state lifetime and charge transport with Se-modified ligand
Chinese Chemical Letters. 2026. V.37. N10. 112136 . DOI: 10.1016/j.cclet.2025.112136 Scopus OpenAlex

Submitted:	Sep 25, 2025
Published print:	Nov 19, 2025
Published online:	Jul 8, 2026

≡ Scopus:	2-s2.0-105044329541
≡ OpenAlex:	W4416418822