CPC H10K 50/11 (2023.02) [H10K 2101/10 (2023.02); H10K 2101/27 (2023.02)] | 19 Claims |
1. An organic light emitting device (OLED) comprising, sequentially:
an anode;
a hole transporting layer;
an emissive region;
an electron transporting layer; and
a cathode; wherein the emissive region comprises:
a first compound;
a second compound; and
a third compound;
wherein the first compound is capable of functioning as a phosphorescent emitter in an OLED at room temperature;
wherein the second compound meets at least one of the following conditions:
(1) the second compound is capable of functioning as a TADF emitter in an OLED at room temperature; and
(2) the second compound is capable of forming an exciplex with the first compound in an OLED at room temperature;
wherein the third compound is a fluorescent compound functioning as an emitter in said OLED at room temperature; and
wherein the OLED emits a luminescent emission comprising an emission component from the S1 energy of the third compound when a voltage is applied across the OLED, wherein at least 65% of the emission from the OLED is produced from the third compound with a luminance of at least 10 cd/m2.
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