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US 2009/0153021 A1Published application
Large-bandgap host materials for phosphorescent emitters
AssigneeWashington University
InventorsKwan-Yue Jen, Shi Michelle Lui, Yu-Hua Niu
Life of this patent
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Abstract
Polymers and compounds having high-triplet-energy; guest-host films comprising the polymers or compounds as hosts and phosphorescent compounds as guests; and electroluminescent devices that include the films.
Claims20
A polymer having a ground state to singlet excited state energy gap of from about 3.3 eV to about 3.5 eV, and a triplet energy greater than about 2.6 eV.
A polymer having the formula:
- wherein R1 and R2 are independently selected from substituted and unsubstituted carbazole, substituted and unsubstituted thiophene, substituted and unsubstituted triphenyl amine, substituted and unsubstituted oxadiazole, substituted and unsubstituted triazine, substituted and unsubstituted benzothiadiazole, cyano, substituted and unsubstituted pyridine, substituted and unsubstituted quinoline, and substituted and unsubstituted quinoxaline;
- wherein R3, R4, R5, and R6 are independently selected from branched and straight-chain alkyl groups having from one to twenty carbon atoms or branched and straight-chain alkoxy groups having from one to twenty carbon atoms;
- and
- m is an integer from 0 to about 60;
- n is an integer from 0 to about 60;
- and
- m+n≧1.
4 more elements
A polymer having the formula:
- wherein R1 and R2 are independently selected from substituted and unsubstituted carbazole, substituted and unsubstituted thiophene, substituted and unsubstituted triphenyl amine, substituted and unsubstituted oxadiazole, substituted and unsubstituted triazine, substituted and unsubstituted benzothiadiazole, cyano, substituted and unsubstituted pyridine, substituted and unsubstituted quinoline, and substituted and unsubstituted quinoxaline;
- wherein R3, R4, R5, and R6 are independently selected from branched and straight-chain alkyl groups having from one to twenty carbon atoms or branched and straight-chain alkoxy groups having from one to twenty carbon atoms;
- and
- m is an integer from 0 to about 60;
- n is an integer from 0 to about 60;
- and
- m+n≧1.
4 more elements
A compound having the formula
- (E-L)nX
- wherein n is 0, 1, 2, 3, or 4;
- wherein X is an alkyl, heteroalkyl, or aryl core that is linked to charge-transporting moiety E by linker L;
- and
- wherein E independently at any occurrence is the same or different from any other E in the compound.
2 more elements
A compound having the formula:
- wherein R7 is selected from the group consisting of
Dependencies are inferred from the claim text.