Polymer, and Organic Light Emitting Element Using Same

A polymer comprising:

• a first unit represented by Chemical Formula 1;
• a second unit represented by Chemical Formula 1 and different from the first unit;
• a third unit represented by Chemical Formula 2;
• and
• an end group represented by Chemical Formula 3:
• wherein, in Chemical Formulae 1 to 3,
• L1, L3 and L4 are the same as or different from each other, and are each independently a direct bond;
• or a substituted or unsubstituted arylene group,
• Ar1, Ar2 and L2 are the same as or different from each other, and are each independently a substituted or unsubstituted arylene group,
• R1 and R2 are the same as or different from each other, and are each independently hydrogen;
• deuterium;
• 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 heterocyclic group;
• a substituted or unsubstituted arylamine group;
• or a substituted or unsubstituted siloxane group,
• R10 and R11 are the same as or different from each other, and are each independently a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted aryl group;
• a substituted or unsubstituted heterocyclic group;
• or a substituted or unsubstituted arylamine group,
• n1 and n2 are each independently an integer from 1 to 4, and when n1 and n2 are each 2 or higher, each occurrence of R1 and R2 is the same as or different from each other, respectively,
• m is an integer of 3 or 4,
• when m is 3, Z is CRa;
• SiRa;
• N;
• or a substituted or unsubstituted trivalent aryl group,
• when m is 4, Z is C;
• Si;
• or a substituted or unsubstituted tetravalent aryl group,
• Ra is hydrogen;
• deuterium;
• a substituted or unsubstituted alkyl group;
• or a substituted or unsubstituted aryl group,
• Y is a direct bond;
• a substituted or unsubstituted alkylene group;
• or a substituted or unsubstituted arylene group,
• when Y is a direct bond;
• or a substituted or unsubstituted alkylene group, Z is a substituted or unsubstituted trivalent or tetravalent aryl group,
• E is hydrogen;
• deuterium;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted silyl group;
• a substituted or unsubstituted aryl group;
• a substituted or unsubstituted arylamine group;
• a substituted or unsubstituted siloxane group;
• a substituted or unsubstituted heterocyclic group;
• a cross-linkable group;
• or a combination thereof, and
• * is an attachment point in the polymer.