Charge transport compositions and electronic devices made with such compositions
View Patent ↗The present invention relates to charge transport compositions. The invention further relates to electronic devices in which there is at least one active layer comprising such charge transport compositions.
1. An electronic device comprising a photoactive layer and a second layer, wherein at least one layer comprises a quinoxaline derivative of Formula II,
wherein:
R 1 and R 2 are the same or different at each occurrence and are selected from H, F, Cl, Br, alkyl, heteroalkyl, alkenyl, alkynyl, aryl, heteroaryl, alkylaryl, alkenylaryl, alkynylaryl, alkylheteroaryl, alkenylheteroaryl, alkynylheteroaryl, C n H a F b , OC n H a F b , C 6 H c F d , and OC 6 H c F d , or both of R 2 together may constitute an arylene or heteroarylene group;
R 3 is the same or different at each occurrence and is selected from a single bond and a group selected from alkylene, heteroalkylene, arylene, heteroarylene, arylenealkylene, and heteroarylenealkylene;
Q is selected from a multivalent group consisting of arylamines, silanes, siloxanes, alkynylene groups and heteroalkynylene groups, or from Formulae IV(d)-IV(f):
a, b, c, and d are 0 or an integer such that a+b=2n+1, and c+d=5;
m is an integer equal to at least 2;
n is an integer;
p is 0 or 1; and
x is 0 or an integer from 1 through 3.
2. The device of claim 1 , wherein the second layer comprises a quinoxaline derivative having Formula II, and further wherein:
m is an integer from 2 through 10;
n is an integer from 1 through 12.
3. The device of claim 1 , wherein the second layer comprises a quinoxaline derivative having Formula II, and further wherein:
R 1 and R 2 are the same or different at each occurrence and are selected from H, F, Cl, Br, alkyl, heteroalkyl, aryl, heteroaryl, alkylaryl, alkenylaryl, alkynylaryl, alkylheteroaryl, alkenylheteroaryl, alkynylheteroaryl, C n H a F b , OC n H a F b , C 6 H c F d , and OC 6 H c F d , or both of R 2 together may constitute an arylene or heteroarylene group;
m is an integer from 2 through 10;
n is an integer from 1 through 12; and
p is 0.
4. The device of claim 1 , wherein R 1 is selected from phenyl and substituted phenyl groups.
5. The device of claim 4 , wherein R 1 is selected from substituted phenyl groups having at least one substituent selected from F, Cl, Br, alkyl groups, heteroalkyl groups, alkenyl groups, and alkynyl groups.
6. The device of claim 1 , wherein R 1 is selected from alkylacetate and arylcarbonyl groups.
7. The device of claim 1 , wherein R 1 is selected from alkyl groups having from 1 to 12 carbon atoms.
8. The device of claim 1 , wherein R 2 is selected from phenyl groups, substituted phenyl groups, pyridyl groups, and substituted pyridyl groups.
9. The device of claim 1 , wherein R 2 together form a biarylene group.
10. The device of claim 9 , wherein the biarylene group is selected from biphenylene, substituted biphenylene, bipyridylene, and substituted bipyridylene.
11. The device of claim 1 , wherein R 3 is selected from aryl, heteroaryl, alkyl, and heteroalkyl.
12. The device of claim 1 , wherein R 3 is selected from phenyl and substituted phenyl.
13. The device of claim 1 , wherein R 3 is selected from alkyl and heteroalkyl having from 1 to 12 carbon atoms.
14. The electronic device of claim 1 wherein Q is selected from Formulae IV(g) and IV(h):