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

Zhipeng Guo; Arseny Gladkikh; Egor Latipov; Andrey Vashchenko; Yaxuan Liu; Alexey Medvedko; Alexander Goloveshkin; Olga Maloshitskaya; Alexey Alexandrov; Aowei Zhou; Yiming Yin; Yanan Zhu; Hong Meng; Valentina Utochnikova

doi:10.1016/j.cclet.2025.112136

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

Zhipeng Guo
, Arseny Gladkikh
, Egor Latipov
, Andrey Vashchenko
, Yaxuan Liu
, Alexey Medvedko
, Alexander Goloveshkin
, Olga Maloshitskaya
, Alexey Alexandrov
, Aowei Zhou
, Yiming Yin
, Yanan Zhu
, Hong Meng
, Valentina Utochnikova

Faculty of Materials Science
Moscow State University
Faculty of Materials Science
Shenzhen MSU-BIT University
Russian Academy of Sciences
P.N. Lebedev Physical Institute of the Russian Academy of Sciences
Beijing Institute of Technology
N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences
Russian Academy of Sciences
Department of Chemistry
Russian Academy of Sciences
School of Advanced Materials
Tsinghua University

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

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 (EQE_max) 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.

Original language	English
Article number	112136
Journal	Chinese Chemical Letters
Volume	37
Issue number	10
DOIs	https://doi.org/10.1016/j.cclet.2025.112136
Publication status	Published - 1 Oct 2026
Externally published	Yes

Keywords

High efficiency
Lanthanide complexes
Organic light-emitting diode
Se-modified ligand
Solution-processed OLED

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10.1016/j.cclet.2025.112136

Cite this

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. (2026). 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, 37(10), Article 112136. https://doi.org/10.1016/j.cclet.2025.112136

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

abstract = "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.",

keywords = "High efficiency, Lanthanide complexes, Organic light-emitting diode, Se-modified ligand, Solution-processed OLED",

author = "Zhipeng Guo and Arseny Gladkikh and Egor Latipov and Andrey Vashchenko and Yaxuan Liu and Alexey Medvedko and Alexander Goloveshkin and Olga Maloshitskaya and Alexey Alexandrov and Aowei Zhou and Yiming Yin and Yanan Zhu and Hong Meng and Valentina Utochnikova",

note = "Publisher Copyright: {\textcopyright} 2026",

year = "2026",

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doi = "10.1016/j.cclet.2025.112136",

language = "English",

volume = "37",

journal = "Chinese Chemical Letters",

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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 2026, '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, vol. 37, no. 10, 112136. https://doi.org/10.1016/j.cclet.2025.112136

TY - JOUR

T1 - Enhanced efficiency of solution-processed lanthanide-based OLEDs via ligand engineering

T2 - Tuning excited-state lifetime and charge transport with Se-modified ligand

AU - Guo, Zhipeng

AU - Gladkikh, Arseny

AU - Latipov, Egor

AU - Vashchenko, Andrey

AU - Liu, Yaxuan

AU - Medvedko, Alexey

AU - Goloveshkin, Alexander

AU - Maloshitskaya, Olga

AU - Alexandrov, Alexey

AU - Zhou, Aowei

AU - Yin, Yiming

AU - Zhu, Yanan

AU - Meng, Hong

AU - Utochnikova, Valentina

PY - 2026/10/1

Y1 - 2026/10/1

N2 - 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.

AB - 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.

KW - High efficiency

KW - Lanthanide complexes

KW - Organic light-emitting diode

KW - Se-modified ligand

KW - Solution-processed OLED

UR - https://www.scopus.com/pages/publications/105044329541

U2 - 10.1016/j.cclet.2025.112136

DO - 10.1016/j.cclet.2025.112136

M3 - Article

AN - SCOPUS:105044329541

SN - 1001-8417

VL - 37

JO - Chinese Chemical Letters

JF - Chinese Chemical Letters

IS - 10

M1 - 112136

ER -

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

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Keywords

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