| US 7,531,831 B2 | ||
| Electroluminescent device comprising a cross-linked hole transporting and electron blocking material | ||
| Brian Tierney, Cambridgeshire (United Kingdom); Ilaria Grizzi, Cambridge (United Kingdom); Clare Foden, Cambridge (United Kingdom); Nalin Patel, Cambridge (United Kingdom); and Mark Leadbeater, Cambridge (United Kingdom) | ||
| Assigned to Cambridge Display Technology Limited, Cambridgeshire (United Kingdom) | ||
| Appl. No. 10/549,462 PCT Filed Mar. 19, 2004, PCT No. PCT/GB2004/001209 § 371(c)(1), (2), (4) Date Aug. 08, 2006, PCT Pub. No. WO2004/084260, PCT Pub. Date Sep. 30, 2004. |
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| Claims priority of application No. 0306409.4 (GB), filed on Mar. 20, 2003. | ||
| Prior Publication US 2007/0034859 A1, Feb. 15, 2007 | ||
| Int. Cl. H01L 35/24 (2006.01); H01L 51/00 (2006.01) | ||
| U.S. Cl. 257—40 [257/E51.051] | 20 Claims |
| 1. An optical device comprising
an anode;
a cathode comprising barium, strontium or calcium;
a layer of solution processable organic semiconducting copolymer comprising triarylamine repeat units between the anode and
the cathode; and
a layer of cross-linked hole transporting and electron blocking material located between the anode and the layer of organic
solution processable semiconducting copolymer,
wherein the molar ratio of triarylamine repeat units in the copolymer is between 1% and 10%.
|