| abstract |
An organic light-emitting device includes a first electrode, a second electrode, and an organic layer between the first electrode and the second electrode. The organic layer including an emission layer. The emission layer includes a first host represented by Formula 1 and a second host represented by Formula 2. A volume ratio of the first host to the second host is in a range of about 94:3 to about 77:20: n n n n n n n n n n where R 11 to R 14 , R 21 , R 23 to R 26 , L 11 , L 21 , L 23 , X 21 , a11, a21, a23, b11 to b14, b21, and b23 to b26 are as defined in the specification. |