Light emitting element material

Details Light emitting element material Light emitting element material

2005-05-10

2005-05-10

Yamnitzky, Marie (Department: 1774)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S917000, C313S504000, C252S301160, C564S305000, C564S434000

Reexamination Certificate

active

06890669

ABSTRACT:
A red light emitting element material with high color purity and a light emitting element using the red light emitting element material. A light emitting element material including a compound which is expressed by following general formula (A) and a light emitting element using the compound. In the following general formula (A), at least two of R1, R2, and R3each independently represents an aryl group or heterocyclic group, and at least one of the R1, R2, and R3contains a group expressed by following general formula (B). In the general formula (B), R4represents a heterocyclic group or electron attracting group, R5represents a hydrogen atom or electron attracting group, R6, R7, and R8each independently represents a hydrogen atom or substituent, and m represents 0, 1, or 2. However, in a case in which only one group expressed by the general formula (B) is contained in the general formula (A), R4and R5are not cyano groups at the same time. When R5is a hydrogen atom, R4represents a heterocyclic group which has aromatic rings and is formed from 3 to 7 rings

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Effect of majority carrier space charges on minority carrier injection in dye doped polymer light-emitting devices, S. Berleb et al., Apr. 15, 1998, J. Appl. Phys. vol. 83. No. 8, pp. 4403-4409.

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