Toward Rhenium-based Circularly Polarized OLEDs Using Tailored Chiral Re(CO)3 Emitters

Maria P Davydova; Ting Xu; Alexander M Agafontsev; Lingqiang Meng; Mariusz Wolff; Maxim Yu Petyuk; Irina Yu Bagryanskaya; Alexey S Berezin; Alexey V Tkachev; Hong Meng; Alexander V Artem'ev

doi:10.1002/anie.202419788

Toward Rhenium-based Circularly Polarized OLEDs Using Tailored Chiral Re(CO)3 Emitters

Angew Chem Int Ed Engl. 2024 Dec 16:e202419788. doi: 10.1002/anie.202419788. Online ahead of print.

Affiliations

¹ Nikolaev Institute of Inorganic Chemistry: Institut neorganiceskoj himii imeni A V Nikolaeva, Inorganic Chemistry, RUSSIAN FEDERATION.
² Peking University Shenzhen Graduate School, School of Advanced Materials, CHINA.
³ Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS: Novosibirskij institut organiceskoj himii imeni N N Vorozcova SO RAN, Organic Chemistry, RUSSIAN FEDERATION.
⁴ Universitat Wien, Institut für Funktionelle Materialien and Katalyse, AUSTRIA.
⁵ Nikolaev Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Scinces, 3, Akad. Lavrentiev Ave., 630090, Novosibirsk, RUSSIAN FEDERATION.

PMID: 39676563
DOI: 10.1002/anie.202419788

Abstract

Chiral rhenium(I) emitters showing circularly polarized phosphorescence (CPP) are an attractive mainstay for CP organic light-emitting diodes (CP-OLEDs). However, the efficiency of such emitters is not ideal, and they have never been explored for circularly polarized electroluminescence (CPEL) applications. Here, we have tailored robust chiral Re(I) complexes with improved CPP properties, and firstly demonstrated CPEL from rhenium emitters. The designed chiral Re(I) complexes exhibit a yellow CPP with enhanced |glum| factors (up to 2.5×10-2) and a good quantum efficiency. The pioneering Re(I)-based CP-OLEDs (based on the obtained emitters) exhibit yellow CPEL with |gEL| factors of up to 6.2×10-3 and maximal external quantum efficiency of 13.2%. Furthermore, we have demonstrated for the first time a suppressive effect of a magnetic field on the CPP strength of Re(I) emitters. This work highlights the good potential of chiral Re(I) emitters for CPEL applications, and opens up a new shortcut to CPP-active Re(I) complexes.

Keywords: Circularly polarized luminescence * Phosphorescent emitters * Magnetically sensitive luminescence * Circularly polarized electroluminescence * Rhenium.