На сайте журнала Angewandte Chemie International Edition (IF 16,1) опубликована статья, соавторами которой являются ученые из ИНХ СО РАН, Китая, Австрии и НИОХ СО РАН (к.х.н. А. М. Агафонцев (снс ЛТС), д.х.н. И.Ю. Багрянская (внс, руководитель группы ГРСА) и д.х.н., проф. А.В. Ткачев (завлаб ЛТС) :
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
Angewandte Chemie International Edition, 2024, e202419788
Chiral Re(I) emitters exhibiting strong circularly polarized phosphorescence (CPP) with enhanced dissymmetry factors and PLQYs are tailored and exploited to develop the the first examples of rhenium-based CP-OLEDs. The latter exhibit gEL factors of up to 6.2×10−3 along with a good device performance. This work highlights potential of chiral Re(I) emitters for CP-OLED applications, and provides a new shortcut to CPP-active emitters.
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.
