Compound and organic light emitting device comprising same

A compound represented by Chemical Formula 1:

• wherein, in Chemical Formula 1,
• L is a direct bond, a substituted or unsubstituted arylene group, or a substituted or unsubstituted heteroarylene group;
• a and b are the same as or different from each other, and each independently is N or CR;
• R is a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group;
• R1 to R6 and R11 to R14 are the same as or different from each other, and each independently is hydrogen, a nitrile group, a halogen group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heteroaryl group;
• and
• at least one of R7 to R10 is Chemical Formula A, and the remaining R7 to R10 are hydrogen;
• wherein in Chemical Formula A,
• means a bond with R7 to R10;
• R15 is hydrogen, a nitrile group, a halogen group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, or adjacent groups bond to each other to form a substituted or unsubstituted ring;
• and
• r15 is an integer of 0 to 8, and when r15 is 2 or greater, R15s are the same as or different from each other.