Organic light emitting diode

An organic light emitting diode comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• an emissive layer disposed between the first electrode and the second electrode,
• wherein the emissive layer comprises:
• a first emitting part disposed between the first electrode and the second electrode, and comprising a first emitting material layer;
• a second emitting part disposed between the first emitting part and the second electrode, and comprising a second emitting material layer;
• and
• a charge generation layer disposed between the first emitting part and the second emitting part, and comprising an N-type charge generation layer,
• wherein the first emitting part further comprises a lower electron transport layer disposed between the first emitting part and the charge generation layer,
• wherein the lower electron transport layer comprises:
• a lower first electron transport layer disposed between the first emitting material layer and the charge generation layer;
• and
• a lower second electron transport layer disposed between the first lower electron transport layer and the charge generation layer,
• wherein the lower first electron transport layer comprises a first electron transporting material having the following structure of Chemical Formula 1,
• wherein the lower second electron transport layer comprises a second electron transporting material having the following structure of Chemical Formula 4, and
• wherein the N-type charge generation layer comprises a phenanthroline-based organic compound having the following structure of Chemical Formula 7:
• wherein, in Chemical Formula 1,
• each of R1 and R2 is independently an unsubstituted or substituted C1-C10 alkyl group, an unsubstituted or substituted C6-C30 aryl group or an unsubstituted or substituted C3-C30 hetero aryl group, where at least one of R1 and R2 is an unsubstituted or substituted anthracenyl group;
• each of R3 and R4 is independently an unsubstituted or substituted C1-C10 alkyl group, an unsubstituted or substituted C6-C30 aryl group or an unsubstituted or substituted C3-C30 hetero aryl group, where each R3 is identical to or different form each other when m is an integer of 2 or more, and where each R4 is identical to or different from each other when n is an integer of 2 or more;
• each of L1, L2 and L3 is independently a single bond, an unsubstituted or substituted C6-C30 arylene group or an unsubstituted or substituted C3-C30 hetero arylene group;
• and
• each of m and n is independently an integer of 0 to 9,
• wherein, in Chemical Formula 4,
• each of R21 and R22 is independently an unsubstituted or substituted C1-C10 alkyl group, an unsubstituted or substituted C6-C30 aryl group or an unsubstituted or substituted C3-C30 hetero aryl group, where at least one of R21 and R22 is an unsubstituted or substituted fluorenyl group having a spiro structure;
• each of R23 and R24 is independently an unsubstituted or substituted C1-C10 alkyl group, an unsubstituted or substituted C6-C30 aryl group or an unsubstituted or substituted C3-C30 hetero aryl group, where each R23 is identical to or different form each other when s is an integer of 2 or more, and where each R24 is identical to or different from each other when t is an integer of 2 or more;
• each of L21, L22 and L23 is independently a single bond, an unsubstituted or substituted C6-C30 arylene group or an unsubstituted or substituted C3-C30 hetero arylene group;
• and
• each of s and t is independently an integer of 0 to 7,
• wherein, in Chemical Formula 7,
• each of R41 to R47 is independently hydrogen, an unsubstituted or substituted C1-C10 alkyl group or an unsubstituted or substituted C6-C30 aryl group;
• A is an unsubstituted or substituted C6-C30 aromatic group with a valence of k, where each phenanthroline moiety is identical to or different from each other when k is 2 or more;
• and
• k is an integer of 1 to 6.

An organic light emitting diode comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• an emissive layer disposed between the first electrode and the second electrode,
• wherein the emissive layer comprises:
• a first emitting part disposed between the first electrode and the second electrode, and comprising a first emitting material layer and a lower electron transport layer;
• a second emitting part disposed between the first emitting part and the second electrode, and comprising a second emitting material layer and a middle electron transport layer;
• a third emitting part disposed between the second emitting part and the second electrode, and comprising a third emitting material layer;
• a first charge generation layer disposed between the first emitting part and the second emitting part, and comprising a first N-type charge generation layer;
• and
• a second charge generation layer disposed between the second emitting part and the third emitting part, and comprising a second N-type charge generation layer,
• wherein at least one of the lower electron transport layer and the middle electron transport layer comprises:
• a first electron transport layer disposed between an emitting material layer of the first emitting material layer and the second emitting material layer, and an N-type charge generation layer of the first N-type charge generation layer and the second N-type charge generation layer;
• and
• a second electron transport layer disposed between the first electron transport layer and the N-type charge generation layer of the first N-type charge generation layer and the second N-type charge generation layer,
• wherein the first electron transport layer comprises a first electron transporting material having the following structure of Chemical Formula 1,
• wherein the second electron transport layer comprises a second electron transporting material having the following structure of Chemical Formula 4, and
• wherein the N-type charge generation layer providing electrons to the second electron transport layer of the first N-type charge generation layer and the second N-type charge generation layer comprises a phenanthroline-based organic compound having the following structure of Chemical Formula 7:
• wherein, in Chemical Formula 1,
• each of R1 and R2 is independently an unsubstituted or substituted C1-C10 alkyl group, an unsubstituted or substituted C6-C30 aryl group or an unsubstituted or substituted C3-C30 hetero aryl group, where at least one of R1 and R2 is an unsubstituted or substituted anthracenyl group;
• each of R3 and R4 is independently an unsubstituted or substituted C1-C10 alkyl group, an unsubstituted or substituted C6-C30 aryl group or an unsubstituted or substituted C3-C30 hetero aryl group, where each R3 is identical to or different form each other when m is an integer of 2 or more, and where each R4 is identical to or different from each other when n is an integer of 2 or more;
• each of L1, L2 and L3 is independently a single bond, an unsubstituted or substituted C6-C30 arylene group or an unsubstituted or substituted C3-C30 hetero arylene group;
• and
• each of m and n is independently an integer of 0 to 9,
• wherein, in Chemical Formula 4,
• each of R21 and R22 is independently an unsubstituted or substituted C1-C10 alkyl group, an unsubstituted or substituted C6-C30 aryl group or an unsubstituted or substituted C3-C30 hetero aryl group, where at least one of R21 and R22 is an unsubstituted or substituted fluorenyl group having a spiro structure;
• each of R23 and R24 is independently an unsubstituted or substituted C1-C10 alkyl group, an unsubstituted or substituted C6-C30 aryl group or an unsubstituted or substituted C3-C30 hetero aryl group, where each R23 is identical to or different form each other when s is an integer of 2 or more, and where each R24 is identical to or different from each other when t is an integer of 2 or more;
• each of L21, L22 and L23 is independently a single bond, an unsubstituted or substituted C6-C30 arylene group or an unsubstituted or substituted C3-C30 hetero arylene group;
• and
• each of s and t is independently an integer of 0 to 7,
• wherein, in Chemical Formula 7,
• each of R41 to R47 is independently hydrogen, an unsubstituted or substituted C1-C10 alkyl group or an unsubstituted or substituted C6-C30 aryl group;
• A is an unsubstituted or substituted C6-C30 aromatic group with a valence of k, where each phenanthroline moiety is identical to or different from each other when k is 2 or more;
• and
• k is an integer of 1 to 6.