Organic light emitting device

An organic light emitting device, comprising:

• a substrate;
• and
• an organic light emitting diode positioned on the substrate and including:
• a first electrode;
• a second electrode facing the first electrode;
• a first emitting material layer positioned between the first electrode and the second electrode and including (i) a first host of an anthracene derivative and (ii) a first dopant of a boron derivative;
• and
• an electron blocking layer including an electron blocking material and positioned between the first electrode and the first emitting material layer,
• wherein an anthracene core of the first host is deuterated, and the first dopant is a compound in Formula 4:
• wherein the electron blocking material is represented by Formula 5:
• wherein in the Formula 5, L is C6 to C30 arylene group,
• wherein R1 and R2 is C1 to C10 alkyl, or adjacent two of R1 and R2 or adjacent two of R2 form an unsubstituted fused ring,
• wherein R3 is C5 to C30 heteroaryl group containing O as the heteroatom, and R4 is hydrogen or C6 to C12 aryl,
• wherein “a” is 0 or 1, “b” is an integer of 0 to 4, and “c” is an integer of 0 to 5,
• wherein the first host is one of compounds represented by Formula 2: