Abstract: A compound for an organic light-emitting device, the compound represented by Chemical Formula 1 and satisfying Mathematical Formula 1: ES1<2ET1<ET2,??Mathematical Formula 1 wherein, in Mathematical Formula 1, ES1 is a first singlet energy of the compound; ET1 is a first triplet energy of the compound; and ET2 is a second triplet energy of the compound.

Abstract: A display apparatus includes an emission portion disposed on a substrate and comprising an intermediate layer; and an encapsulation portion sealing the emission portion by overlapping the emission portion, wherein the intermediate layer comprises at least two organic materials, the organic materials having different phase transition temperatures at a first saturated vapor pressure in a range from 5×10?4 Torr to 3×10?2 Torr, and the difference between the phase transition temperatures being less than or equal to 5° C.

Abstract: Provided are condensed cyclic compounds and an organic light-emitting device having the compounds which has decreased driving voltage, higher efficiency, and increased overall lifespan.

Abstract: An organic light-emitting device including: a first electrode, a hole transport region including a first hole transport layer (HTL), an emission layer, an electron transport region; and a second electrode; wherein the first HTL includes a first compound and a second compound, the emission layer includes a third compound and a fourth compound, the electron affinity of the second compound is greater than the electron affinity of the first compound, a lowest unoccupied molecular orbital (LUMO) energy level of the fourth compound is greater than a LUMO energy level of the third compound, the second compound and the third compound are different from each other, and the minimum anionic dissociation energy of the second compound is greater than the triplet energy of the third compound.

Abstract: A display apparatus includes an emission portion disposed on a substrate and comprising an intermediate layer; and an encapsulation portion sealing the emission portion by overlapping the emission portion, wherein the intermediate layer comprises at least two organic materials, the organic materials having different phase transition temperatures at a first saturated vapor pressure in a range from 5×10?4 Torr to 3×10?2 Torr, and the difference between the phase transition temperatures being less than or equal to 5° C.

Abstract: A compound for an organic light-emitting device, the compound represented by Chemical Formula 1 and satisfying Mathematical Formula 1: ES1<2ET1<ET2,??Mathematical Formula 1 wherein, in Mathematical Formula 1, ES1 is a first singlet energy of the compound; ET1 is a first triplet energy of the compound; and ET2 is a second triplet energy of the compound.