Electroluminescent Device
AssigneesCDT Oxford Limited, Cambridge Display Technology Limited
InventorsCarl Towns, Ilaria Grizzi, Stephen O'Connor, Annette Steudel, Jonathan Pillow, Michael Frampton
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Abstract
An electroluminescent device comprising:—a first electrode for injection of positive charge carriers;—a second electrode for injection of negative charge carriers; and—an electroluminescent layer located between the first and second electrodes comprising a host material and a metal complex, wherein the host material comprises a polymer having a first repeat unit of formula (I): wherein each Ar is the same or different and independently represents an optionally substituted aryl or heteroaryl and any two Ar groups may be directly linked by a single bond.
Claims21
An electroluminescent device comprising:
- a first electrode for injection of positive charge carriers;
- a second electrode for injection of negative charge carriers;
- and
- an electroluminescent layer located between the. first and second electrodes comprising a host material and a metal complex,
- wherein the host material comprises a polymer having a first repeat unit of formula (I):
- wherein each Ar is the same or different and independently represents an optionally substituted aryl or heteroaryl and any two Ar groups may be directly linked by a single bond.
An electroluminescent polymer comprising a repeat unit of formula (I) and a metal complex bound to the polymer as a substituent attached to the polymer main chain or incorporated into the polymer main chain:
- wherein each Ar is the same or different and independently represents an optionally substituted aryl or heteroaryl and any two Ar groups may be directly linked by a single bond.
A monomer of formula (XIII):
- wherein each Ar is the same or different and independently represents an optionally substituted aryl or heteroaryl;
- any two Ar groups may be directly linked by a single bond;
- M is a metal;
- each of L1, L2 and L3 is a coordinating group;
- q is an integer;
- r and s are each independently 0 or an integer;
- the sum of (a. q)+(b. r)+(c.s) is equal to the number of coordination sites available on M, wherein a is the number of coordination sites on L1, b is the number of coordination sites on L2 and c is the number of coordination sites on L3;
- and each P is the same or different and is a polymerisable group.
Dependencies are inferred from the claim text.