Outstanding Circularly Polarized TADF in Chiral Cu(I) Emitters: From Design to Application in CP‐TADF OLEDs

Outstanding Circularly Polarized TADF in Chiral Cu(I) Emitters: From Design to Application in CP‐TADF OLEDs Full article

Journal

Angewandte Chemie - International Edition
ISSN: 1433-7851 , E-ISSN: 1521-3773

Output data

Year: 2024, Volume: 63, Number: 52, Article number : e202412437, Pages count : DOI: 10.1002/anie.202412437

Tags

Circularly polarized luminescence TADF emitters Magnetically sensitive luminescence Negative thermal quenching CP-TADF OLEDs

Authors

Petyuk Maxim Yu. ¹ , Meng Lingqiang ² , Ma Zihao ² , Agafontsev Alexander M. ³ , Bagryanskaya Irina Yu. ³ , Berezin Alexey ¹ , Zhang Jingzhi ² , Chu Anlea ⁴ , Rakhmanova Mariana I. ¹ , Meng Hong ² , Tkachev Alexey V. ³ , Yam Vivian Wing-Wah ⁴ , Artem'ev Alexander V. ¹

Affiliations

1	Nikolaev Institute of Inorganic Chemistry, SB RAS
2	School of Advanced Materials, Peking University Shenzhen Graduate School, Peking University
3	Vorozhtsov Novosibirsk Institute of Organic Chemistry, SB RAS
4	Institute of Molecular Functional Materials and Department of Chemistry, The University of Hong Kong

Low-cost molecular emitters that merge circularly polarized luminescence (CPL) and thermally activated delayed fluorescence (TADF) properties are attractive for many high-tech applications. However, the design of such emitters remains a difficult task. To address this challenge, here, we propose a simple and efficient strategy, demonstrated by the design of pseudochiral-at-metal complexes [Cu(L*)DPEPhos]PF6 bearing a (+)/(–)-menthol-derived 1,10-phenanthroline ligand (L*). These complexes exhibit a yellow CP-TADF with a record-high quantum yield (close to 100%) and high dissymmetry factor (|glum| ~ 1×10–2). Remarkably, the above compounds also show a negative thermal-quenching (NTQ) of luminescence in the 300–77 K range. Exploiting the designed Cu(I) emitters, we fabricated efficient CP-TADF OLEDs displaying mirror-imaged CPL bands with high |gEL| factors of 1.5×10–2 and the maximum EQE of 6.15%. Equally important, using the (+)-[Cu(L*)DPEPhos]PF6 complex, we have discovered that an external magnetic field noticeably suppresses CP-TADF of Cu(I) emitters. These findings are an important contribution to the CPL phenomenon and provide access to highly efficient, low-cost and robust CP-TADF emitters.

Petyuk M.Y. , Meng L. , Ma Z. , Agafontsev A.M. , Bagryanskaya I.Y. , Berezin A. , Zhang J. , Chu A. , Rakhmanova M.I. , Meng H. , Tkachev A.V. , Yam V.W-W. , Artem'ev A.V.
Outstanding Circularly Polarized TADF in Chiral Cu(I) Emitters: From Design to Application in CP‐TADF OLEDs
Angewandte Chemie - International Edition. 2024. V.63. N52. e202412437 . DOI: 10.1002/anie.202412437 WOS OpenAlex

Submitted:	Jul 2, 2024
Accepted:	Sep 4, 2024
Published online:	Sep 5, 2024

Web of science:	WOS:001364445300001
OpenAlex:	W4402278946

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