JP2003086379A5 - - Google Patents

Claims (6)

An element that includes at least a light-emitting material, a hole transport material, and an electron transport material as a light- emitting substance between an anode and a cathode and emits light by electric energy, the element emits light at an emission peak wavelength of 580 nm to 720 nm, At least the following general formula diketopyrrolo [3,4-c] pyrrole derivative and the fluorescence peak wavelength shown in (1) is seen containing a 720nm following organic fluorescent substance or 580 nm, ionization potential of the electron transporting material is more than 5.9eV the luminescent material emitting element characterized in that it.

{R ¹ and R ² may be the same or different and are selected from alkyl groups having 1 to 25 carbon atoms or the following general formula (2);

(R ³ and R ⁴ may be the same or different, and are selected from alkyl groups having 1 to 4 carbon atoms, ignorant or phenyl groups substituted with 1 to 3 carbon atoms, and Ar ³ is an alkyl group. And a phenyl group having a substituent selected from an alkoxy group, a halogen, and a phenyl group, an unsubstituted or substituted naphthyl group, and m represents an integer of 0 to 4.)
Ar ¹ and Ar ² may be the same or different and are selected from an unsubstituted or substituted phenyl group, naphthyl group, styryl group, and carbazolyl group. } The light-emitting element according to claim 1, wherein the organic fluorescent material is a compound having a pyromethene skeleton represented by the following general formula (3) or a metal complex thereof.

(Here, at least one of R ^{5 to} R ¹¹ contains an aromatic ring or forms a condensed ring with an adjacent substituent, and the rest are hydrogen, alkyl group, cycloalkyl group, aralkyl group, alkenyl group. , Cycloalkenyl group, alkynyl group, hydroxyl group, mercapto group, alkoxy group, alkylthio group, alkylseleno group, arylether group, arylthioether group, arylselenoether group, aryl group, heterocyclic group, halogen, haloalkane, haloalkene, haloalkyne , A cyano group, an aldehyde group, a carbonyl group, a carboxyl group, an ester group, a carbamoyl group, an amino group, a nitro group, a silyl group, a siloxanyl group, and a condensed ring and an aliphatic ring formed between adjacent substituents X is carbon or nitrogen, but in the case of nitrogen, the above R ¹¹ (The metal of the metal complex is at least one selected from boron, beryllium, magnesium, chromium, iron, cobalt, nickel, copper, zinc, and platinum.) The light emitting device according to claim 2, wherein the metal complex is represented by the following general formula (4).

(At least one of R ^{12 to} R ¹⁸ contains an aromatic ring or forms a condensed aromatic ring with an adjacent substituent, and the rest are hydrogen, alkyl group, cycloalkyl group, aralkyl group, alkenyl. Group, cycloalkenyl group, alkynyl group, hydroxyl group, mercapto group, alkoxy group, alkylthio group, alkylseleno group, arylether group, arylthioether group, arylselenoether group, aryl group, heterocyclic group, halogen, haloalkane, haloalkene, Haloalkyne, cyano group, aldehyde group, carbonyl group, carboxyl group, ester group, carbamoyl group, amino group, nitro group, silyl group, siloxanyl group, in condensed and aliphatic rings formed between adjacent substituents ^{.R 19} and ^{R 20} is selected from the be the same or different , Halogen, hydrogen, alkyl, aryl, .X selected from heterocyclic group is a carbon or nitrogen, in the case of nitrogen above R ¹⁸ is absent.) The electron ionization potential of transporting material is not less than 5.9 eV, and the light-emitting element according to claim 1, wherein the molecular weight is equal to or 400 or more. Emitting device of claim 1, wherein the glass transition temperature of the electron transporting material is characterized in that at 90 ° C. or higher. Anode, a hole transport layer, light emitting layer, electron transporting layer, the light emitting device of claim 1, wherein the sequentially stacking a cathode.