Organic Electroluminescent Device and Display Device Comprising the Organic Electroluminescent Device

An organic electroluminescent device comprising an anode layer, a cathode layer, a first emission layer (EML), an electron transport layer (ETL) and an electron injection layer (EIL), wherein the EML, ETL and EIL are arranged between the anode layer and the cathode layer and the EIL is in direct contact with the cathode layer, whereby

• the EIL comprises at least one compound of formula (I)
• Wherein
• M is a metal ion,
• n is an integer selected from 1 to 4, which corresponds to the oxidation number of M;
• L is an anionic ligand, wherein the proton affinity of L is selected in the range of ≥10 eV and ≤15.6 eV and wherein L comprises at least four fluorine atoms;
• wherein the proton affinity is determined by performing the steps of
• calculation of the optimized geometries of the molecule and its deprotonated form;
• and
• calculation of the proton affinity of the ligand by determining the energy difference between the optimized structure of the molecule and of its deprotonated form;
• whereby the calculations are performed by applying the hybrid functional B3LYP with the 6-31G* basis set in the gas phase as implemented in the program package TURBOMOLE V6.5 or in the program package ORCA Version 5.0.3-f1;
• wherein if several conformers of the molecule are viable, the conformer with the lowest total energy is selected:
• AL is an ancillary ligand;
• m is an integer selected from 0 to 2;
• whereby the EIL comprises at least one metal;
• the ETL comprises a metal organic complex wherein the metal organic complex is free of fluorine atoms;
• wherein the electron transport layer is arranged between the first emission layer and the electron injection layer.