Charge transport materials for luminescent applications
View Patent ↗There is provided a charge transport compound having the formula T-LG-T, where T is a charge transport moiety having the formula —Ar 1 -An-Ar 2 and LG is a linking group. In the compound, An is a divalent anthracene moiety; Ar1 is a single bond or an aromatic group which can be naphthyl, binaphthyl, naphthylphenylene, naphthylbiphenylene, or naphthylbinaphthylene; Ar2 is an aromatic group which can be naphthyl, binaphthyl, naphthylphenylene, naphthylbiphenylene, or naphthylbinaphthylene; and LG can be biphenylene, binaphthylene, or Formula I In Formula I, Q1 and Q2 are the same or different can be alkyl and aryl, or Q1 and Q2 taken together can be alkylene; and Ar3 and Ar4 are the same or different and can be phenylene or naphthylene.
1. A compound having the formula T-LG-T, where T is a charge transport moiety having the formula —Ar 1 -An-Ar 2 and LG is a linking group,
wherein:
An is a divalent anthracene moiety;
Ar 1 is an aromatic group selected from the group consisting of naphthyl, binaphthyl, naphthylphenylene, naphthylbiphenylene, and naphthylbinaphthylene;
Ar 2 is an aromatic group selected from the group consisting of naphthyl, binaphthyl, naphthylphenylene, naphthylbiphenylene, and naphthylbinaphthylene; and
LG is a group having Formula I
wherein
Q 1 and Q 2 are the same or different and are selected from the group consisting of alkyl, or Q 1 and Q 2 taken together are alkylene, and
Ar 3 and Ar 4 are the same or different and are selected from the group consisting of phenylene and naphthylene.
2. An organic electronic device comprising a first electrical contact layer, a second electrical contact layer, and a third layer therebetween, said third layer comprising a compound having the formula T-LG-T, where T is a charge transport moiety having the formula —Ar 1 -An-Ar 2 and LG is a linking group,
wherein:
An is a divalent anthracene moiety;
Ar 1 is an aromatic group selected from the group consisting of naphthyl, binaphthyl, naphthylphenylene, naphthylbiphenylene, and naphthylbinaphthylene;
Ar 2 is an aromatic group selected from the group consisting of naphthyl, binaphthyl, naphthylphenylene, naphthylbiphenylene, and naphthylbinaphthylene; and
LG is a group having Formula I
wherein
Q 1 and Q 2 are the same or different and are selected “from the group consisting of alkyl, or Q 1 and Q 2 taken together are alkylene, and
Ar 3 and Ar 4 are the same or different and are selected from the group consisting of phenylene and naphthylene.
3. The device of claim 2 , wherein said third layer further comprises an electroluminescent material.
4. A host material comprising a compound as in claims 1 .
5. A layer comprising a host material comprising a compound as in claim 1 .
6. The layer of claim 5 further comprising an electroluminescent material.
7. The compound of claim 1 , wherein Q1 and Q2, are the same or different and selected from methyl and trifluoromethy.
8. The device of claim 2 wherein Q 1 and Q 2 , are the same or different and selected from methyl and trifluoromethy.