Organic electroluminescent phosphors

• US 3,172,862 A
• Filed: 09/29/1960
• Issued: 03/09/1965
• Est. Priority Date: 09/29/1960
• Status: Expired due to Term

• Current Assignee: Edward F. Gurnee, Teoste Fernandez Reet
• Original Assignee: Edward F. Gurnee, Teoste Fernandez Reet
• Inventors: Gurnee, Edward F., TEOSTE FERNANDEZ REET
• Application Number:
  US04/059,278
• Time in Patent Office: 1,622 Days
• US Class Current: 252/301.16
• CPC Class Codes: H05B 33/145 Arrangements of the electroluminescent material

Claims

1. AN ELECTROLUMINESCENT PHOSPHOR WHICH COMPRISES BY WEIGHT;

FROM ABOUT 99.85 TO ABOUT 85.5 OF A CONJUGATED ORGANIC COMPOUND HOST MEMBER SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF, (A) NAPHTHALENE (B) ANTHRACENE (C) PHENANTHRENE (D) PYRENE (E) BENZPYRENE (F) CHRYSENE (G) PICENE (H) CARBAZOLE (I) FLUORENE (J) BIPHENYL (K) TERPHENYLS (L) QUATERPHENYLS (M) TRIPHENYLENE OXIDE (N) DIHALOBIPHENYLS (O) TRANS-STILBENE, AND (P) 1,4-DIPHENYL BUTADIENE, FROM ABOUT 0.0001 TO ABOUT 10 PERCENT OF A CONJUGATED BENZENOID COMPOUND ACTIVATOR SELECTED FROM THE GROUP CONSISTING ESSENTIALLY OF, (A) ANTHRACENE (B) TETRACENE, AND (C) PENTACENE SAID ACTIVATOR BEING FURTHER CHARACTERIZED IN THAT IN SAID PHOSPHOR IT IS DIFFERENT COMPOUND THAN SAID HOST MEMBER AND FROM ABOUT 0.15 TO ABOUT 4.5 PERCENT OF A FINELY DIVIDED ELECTRICAL CONDUCTOR SELECTED FROM THE GROUP CONSISTING OF ESSENTIALLY OF, (A) METALS (B) METAL OXIDES (C) METAL SULFIDES, AND (D) CARBON, THE COMPONENTS OF SAID PHOSPHOR BEING IN INTIMATE CONTACT AND THERE SUBSTANTIALLY UNIFORM DISPERSION OF SAID COMPONENTS THROUGHOUT SAID PHOSPHOR.