Electroluminescent materials and methods of manufacture and use

A composition of claim comprising a light emitting polymer is selected from Formulas I″ to XIII″:

• 44 45
• wherein
• R1, R1′, R3, and R3′ are independently hydrogen, substituted or unsubstituted C1-C30 alkyl, substituted or unsubstituted C6-C20 aryl, substituted or unsubstituted C3-C20 heteroaryl, or substituted or unsubstituted C1-C30 hydrocarbyl containing one or more S, N, O, P, or Si atoms;
• R2, R2′, R4 and R4′ are independently substituted or unsubstituted C1-C20 alkyl, substituted or unsubstituted C6-C20 aryl, substituted or unsubstituted C3-C20 heteroaryl, or substituted or unsubstituted C1-C30 hydrocarbyl containing one or more S, N, O, P, or Si atoms;
• a is independently in each occurrence 0 or 1;
• each EC is independently a soft segment end cap group having the formula:
• 46
• wherein Ar is substituted or unsubstituted arylene or substituted or unsubstituted heteroarylene, p is 0 or 1, R″ is a sterically hindering functional group selected from aryl, heteroaryl, and branched alkyl, and Q is a soft segment moiety having two or more functional groups selected from ethers, secondary or tertiary amines, thioethers, dialkylsiloxanes, and dialkoxysiloxanes;
• X and Y are capping groups;
• Ar1 and Ar2 are independently selected from substituted and unsubstituted C6-C20 arylene and substituted and unsubstituted C2-C20 heteroarylene;
• k, l, m, n, and o are integers in the range of 2 to 1000;
• each Z1 and Z2 is independently a soft segment side chain having the formula:
• 47
• wherein Ar is substituted or unsubstituted arylene or substituted or unsubstituted heteroarylene, p is 0 or 1, R″ is a sterically hindering functional group selected from aryl, heteroaryl, and alkyl, and Q is a soft segment moiety having two or more functional groups selected from ethers, secondary or tertiary amines, thioethers, dialkylsiloxanes, and dialkoxysiloxanes;
• and
• each T is independently a soft segment moiety having two or more functional groups selected from ethers, secondary or tertiary amines, thioethers, dialkylsiloxanes, and dialkoxysiloxanes.

A method of making an electroluminescent device comprising

• selectively transferring a light emitting polymer from a donor sheet to a receptor substrate, the light emitting polymer comprising a plurality of arylene monomeric units and a plurality of soft segment units independently selected from soft segment end caps;
• soft segment side chains coupled to a portion, but not all, of the arylene monomeric units;
• internal soft segment monomeric units;
• and combinations thereof.

A donor sheet, comprising:

• a substrate;
• a light-to-heat conversion layer;
• and
• a transfer layer comprising a light emitting polymer comprising a plurality of arylene monomeric units and a plurality of soft segment units independently selected from soft segment end caps;
• soft segment side chains coupled to a portion, but not all, of the arylene monomeric units;
• internal soft segment monomeric units;
• and combinations thereof.