JPH06299148A - Organic electroluminescent element, its production and laser oscillator using the organic electroluminescent element - Google Patents

Abstract

PURPOSE:To obtain an organic electroluminescent element having excellent luminescent characteristics, electrical characteristics and durability and useful for laser oscillator, etc., by laminating a luminescent layer containing a specific anthracene compound deposited under specific condition, a carrier transporting layer, etc., on a substrate by vacuum evaporation method. CONSTITUTION:A substrate such as a glass substrate is laminated with an anthracene compound of formula (R1 to R10 are halogen, phenyl, alkyl or H; R1 to R10 are not H at the same time) or a luminescent layer 8 containing the anthracene compound, one or more carrier-transportation layers 5 and electrodes 2,6 to inject carriers into the luminescent layer 8 and the carrier- transportation layer 5. The lamination is carried out by depositing the organic compound by a vacuum evaporation method at a substrate temperature of 0 to -30 deg.C under pressure of 1X10<-7> to 5X10<-5>Torr.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic electroluminescent device using an organic compound that emits blue light as a light emitting layer, a method for manufacturing the same, and a laser oscillating device using the organic electroluminescent device.

[0002]

2. Description of the Related Art In recent years, CRTs have been used with the diversification of information equipment
There is an increasing need for flat display devices that consume less power and occupy less space. Liquid crystal displays, plasma displays, and the like are available as such flat display elements. Recently, however, attention has been paid to EL elements that are light-emitting and have a clear display.

FIG. 6 is a diagram of Applied Physics Letters ("Applied P", issued on February 26, 1990).
hysics Letters ") Volume 56 Issue 9
FIG. 1 is a cross-sectional view showing the structure of a conventional organic electroluminescent device shown on page 99-801, in which 1 is a substrate and 2 is a substrate 1.
On the anode 2, 3 is a hole transport layer provided on the anode 2, 4 is an organic light emitting layer provided on the hole transport layer 3, and 5 is an organic light emitting layer 4. Electron transport layer, 6
Is a cathode provided on the electron transport layer 5. here,
A transparent electrode is used for the anode 2. A 2000 Å thin film of indium tin oxide (ITO) is used for the transparent electrode. Instead of ITO, a conductive material having a large work function, for example, gold having a thickness of 800 to 1500 Å can be used. The cathode 6 is a conductive material having a small work function,
For example, aluminum, magnesium or the like having a thickness of about 500 Å or more is used. Also, co-evaporation is performed at the time of film formation,
An alloy film of magnesium and silver can also be used. The hole-transporting layer 3 contains 80% of triphenyldiamine derivative TPD.
A thin film with a thickness of 0Å is used. The organic light emitting layer 4 has 1,
A thin film of 1,4,4-tetraphenyl-1,3-butadiene derivative having a thickness of 500 Å is used. Further, a thin film of oxadiazole derivative PBD having a thickness of 600 Å is used for the electron transport layer 5. The electrode films of the anode 2 and the cathode 6, the hole transport layer 3, the organic light emitting layer 4, and the electron transport layer 5 are formed by a vacuum deposition method or a casting method.

Next, the operation will be described. When a forward voltage is applied between the anode 2 and the cathode 6, holes and electrons are injected from the electrodes 2 and 6 into the hole transport layer 3 and the electron transport layer 5, respectively. Then, the hole transport layer 3 and the electron transport layer 5 are
The holes and the electrons are respectively transported to the organic light emitting layer 4.
At this time, the hole transport layer 3 and the electron transport layer 5 also function as blocking layers for electrons and holes, respectively. As a result, potential distribution is realized between the anode 2 and the cathode 6 such that double injection of electrons and holes occurs, and the electrons and holes are recombined in the organic light emitting layer 4 to emit blue light.

[0005]

Since the conventional organic electroluminescence device is constructed as described above, carrier injection characteristics are poor in blue light emission and sufficient blue light cannot be emitted.
In addition, there were problems such as lack of brightness and stability.

The invention of claim 1 has been made to solve the above-mentioned problems, and by using a thin film of the anthracene compound represented by the structural formula (1) for the organic light-emitting layer, good film-forming property is obtained. And an organic electroluminescent device having excellent EL characteristics of blue and blue.

An object of the present invention is to obtain an organic electroluminescence device having excellent durability and high film-forming property and excellent blue EL characteristics by using a thin film of anthracene fluoride for the light emitting layer. And

According to the third aspect of the present invention, by using an anthracene thin film doped with the anthracene compound represented by the structural formula (1) on the organic light emitting surface, excellent film forming properties and excellent EL characteristics of blue color are obtained. The purpose is to obtain an organic electroluminescent device.

According to the fourth aspect of the invention, by doping the anthracene thin film with about 0.1 to 5% of anthracene fluoride, the durability is high and the film formability is excellent, and the blue color E is excellent.
The purpose is to obtain an organic electroluminescent device having L characteristics.

According to a fifth aspect of the present invention, by using a thin film of the anthracene compound represented by the structural formula (1) doped with a fluorescent molecule other than the anthracene compound in the organic light emitting layer, good film-forming property and It is an object to obtain an organic electroluminescence device having excellent blue EL characteristics.

According to the invention of claim 6, by using an organic light emitting layer in which a thin film of anthracene fluoride is doped with a fluorescent molecule other than the anthracene compound, more excellent film formability and excellent EL characteristics of blue color are obtained. The purpose is to obtain an organic electroluminescent device.

According to a seventh aspect of the present invention, when the anthracene compound represented by the structural formula (1) or the organic light emitting layer containing the anthracene compound is deposited by vacuum evaporation, the substrate temperature is 0.
~ -30 ° C, pressure approximately 1 x 10 ^{-7 to} 5 x 10 ^-5 Torr
It is an object of the present invention to provide a method for manufacturing an organic electroluminescence device, which can improve carrier injection characteristics, obtain excellent blue EL characteristics, and manufacture a thin film having excellent film forming properties.

According to an eighth aspect of the present invention, the light emitting layer containing the anthracene compound represented by the structural formula (1) is deposited by co-evaporation to uniformly mix the base material and the dope material, thereby providing excellent film formability. It is an object of the present invention to provide a method for manufacturing an organic electroluminescent device capable of manufacturing a thin film.

According to a ninth aspect of the present invention, a laser capable of stably emitting high-intensity blue light for a long time by using the anthracene compound represented by the structural formula (1) or a thin film containing the anthracene compound as a light emitting layer of a laser device. The purpose is to obtain an oscillator.

[0015]

An organic electroluminescent device according to the invention of claim 1 is a light emitting layer comprising a thin film of an anthracene compound represented by the structural formula (1), at least one carrier transport layer, and a light emitting layer. In addition, an electrode for injecting carriers is laminated on the carrier transport layer.

In the organic electroluminescent element according to the invention of claim 2, anthracene fluoride is used for the light emitting layer.

An organic electroluminescent device according to a third aspect of the present invention includes a light emitting layer formed by doping an anthracene thin film with an anthracene compound represented by the structural formula (1), and at least one.
One carrier transport layer and an electrode for injecting carriers into the light emitting layer and the carrier transport layer are laminated.

In the organic electroluminescent device according to the invention of claim 4, an anthracene thin film doped with anthracene fluoride is used as a light emitting layer.

An organic electroluminescent device according to a fifth aspect of the invention is a light emitting layer formed by doping a thin film of an anthracene compound represented by the structural formula (1) with a fluorescent molecule other than the anthracene compound, and at least one carrier. The transport layer and the light emitting layer and the carrier transport layer are laminated with electrodes for injecting carriers.

In the organic electroluminescence device according to the invention of claim 6, as a light emitting layer, an anthracene fluoride thin film doped with a fluorescent molecule other than the anthracene compound is used.

According to a seventh aspect of the present invention, there is provided a method of manufacturing an organic electroluminescence device, wherein the temperature of the substrate is set to about 0 when the anthracene compound represented by the structural formula (1) or the light emitting layer containing the anthracene compound is deposited by vacuum evaporation. To -30 ° C, and the pressure was set to approximately 1 x 10 ^{-7 to} 5 x 10 ^-5 Torr.

In the method of manufacturing an organic electroluminescence device according to the invention of claim 8, the light emitting layer containing the anthracene compound represented by the structural formula (1) is deposited by co-evaporation.

A laser oscillator according to a ninth aspect of the invention is
It comprises an organic electroluminescent device in which an anthracene compound represented by the structural formula (1) or a thin film containing the anthracene compound, a carrier transporting layer, and an electrode as a resonator are laminated as a laser emitting layer.

[0024]

The organic electroluminescent device according to the invention of claim 1 is
By using the anthracene compound represented by the structural formula (1) in the light-emitting layer, holes and electrons enter into a set of microcrystals having a size of submicron or less and are recombined with each other, and thus the film forming property is excellent, In addition, excellent EL characteristics of blue are obtained.

In the organic electroluminescence device according to the second aspect of the present invention, by using anthracene fluoride in which all hydrogen atoms are replaced by fluorine atoms in the anthracene molecule in the light emitting layer, the energy levels of the highest and lowest occupied molecular orbitals are adjusted. It lowers the electron affinity and increases the rate of non-radiative deactivation from the electronic excited state, thus providing excellent EL characteristics of blue color.

In the organic electroluminescent device according to the third aspect of the present invention, the anthracene compound is used in the anthracene thin film by using a thin film obtained by doping the anthracene thin film with the anthracene compound represented by the structural formula (1). It is possible to obtain a state of being dispersed by a single molecule, and thus, excellent film forming properties and excellent EL characteristics of blue color can be obtained.

In the organic electroluminescence device according to the invention of claim 4, the thin film obtained by doping the anthracene thin film with the anthracene fluoride is used for the light emitting layer, so that the fluorinated anthracene molecule dispersed in a single molecule has a high energy level. It enters into the lowered molecular orbital of the anthracene molecule and increases the electron affinity with the anthracene molecule, and thus excellent EL characteristics of blue color are obtained.

In the organic electroluminescence device according to the invention of claim 5, a thin film obtained by doping a thin film of the anthracene compound represented by the structural formula (1) with a fluorescent molecule other than the anthracene compound is used for the light emitting layer. , Fluorescent molecules dispersed as a single molecule enter into an aggregate of microcrystals other than submicron, and therefore, excellent film-forming property and excellent EL characteristic of blue color can be obtained.

In the organic electroluminescent device according to the invention of claim 6, a thin film obtained by doping a fluorescent molecule other than the anthracene compound into a thin film of the anthracene fluoride is used for the light emitting layer, whereby the fluorescent molecule of the anthracene molecule and the fluorescent property can be obtained. The intermolecular binding force with the molecule is increased, and thus excellent EL characteristics of blue color can be obtained.

In the method of manufacturing an organic electroluminescent device according to the invention of claim 7, the pressure of vacuum deposition at the time of forming the light emitting layer is set to about 1 × 10 ^-5 Tor so that the electron injection characteristic is not deteriorated.
r to ⁵ × 10 ⁻⁵ Torr, and the substrate temperature is set to about 0 to −30 ° C. so that the film forming characteristics are not deteriorated. Therefore, excellent film forming properties can be obtained.

In the method of manufacturing an organic electroluminescent device according to the invention of claim 8, when forming the light emitting layer, the deposition rate of the material to be doped is made higher than that of the material to be doped, and Therefore, the base material and the dope material can be uniformly mixed and excellent film-forming properties can be obtained.

In the laser oscillating device according to the invention of claim 9, the anthracene compound represented by the structural formula (1) or a thin film containing the anthracene compound is used as the organic light-emitting layer, and the laser oscillating device is composed of aggregates of microcrystals, and the crystals do not precipitate. Therefore, high-intensity blue light can be emitted stably for a long time.

[0033]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an organic electroluminescent device according to an embodiment of the invention of claim 1. In the figure, the corresponding parts shown in FIG.

In FIG. 1, an organic light emitting layer 8 is composed of an electron transport layer 5 as a carrier transport layer and an anode 2 for carrier injection.
It is provided between and. The electron transport layer 5 is made of an oxadiazole derivative PBD. The organic light emitting layer 8 has a thickness of 5
It is composed of a thin film of 00Å anthracene compound, and the anthracene compound is represented by the following structural formula (1).

[0035]

[Chemical 2]

As the anthracene compound, for example, a fluorinated anthracene (C ₁₄ F ₁₀ ) thin film in which all hydrogen atoms in the above structural formula (1) are replaced by fluorine atoms is used (claim 2). The organic light emitting layer 8 may be formed by laminating a plurality of anthracene compound thin films or a plurality of anthracene fluoride thin films. In particular, by stacking three layers, charge carriers and excitons can be reliably confined in the light emitting layer. Further, in FIG. 1, a window 10 is formed in the organic light emitting layer 8.
Are formed. This window 10 is formed with an insulating layer 7 provided on the anode 2, which insulating layer 7 is made of SiO 2.
_{It is made of 2} , Si ₃ N ₄ , Al ₂ O ₃ , TiN, polyimide or the like.

The organic light-emitting layer 8 is disposed between the anode 2 and the electron transport layer 5, but it is disposed between the hole transport layer 3 and the electron transport layer 5 as shown in FIG. It may be arranged at the same time, or may be arranged between the cathode 6 and the hole transport layer 3 as shown in FIG. In this case, as the hole transport layer 3,
A triphenyldiamine derivative TPD and an aromatic amine derivative are used.

By using one of the cathode 6 and the anode 2 having a transmittance of 0% and the other having a transmittance of about 1% to form a resonator, and using the above-described organic light emitting layer 8 as a laser light emitting source. Thus, a blue light emitting laser oscillator can be obtained (claim 9).

Next, a method for manufacturing an organic electroluminescent device will be described (claim 7). First, the temperature of the substrate 1 such as a glass substrate is set to −5 ° C., and indium is vacuum-deposited on the substrate 1 at a deposition rate of 500 Å / min to form an anode 2 of 6000 Å. Next, after depositing the SiO ₂ on the anode 2 to form a window 0.2~0.3mm by etching. further,
The substrate temperature was set to −5 ° C. on this SiO ₂ and the deposition rate was 10
Deposition of anthracene fluoride at 0Å / min to a thickness of 500
The Å organic light emitting layer 8 is formed. Next, the substrate temperature is brought to room temperature on the organic light emitting layer 8 and the oxadiazole derivative (PBD) is vapor-deposited at a vapor deposition rate of 100 Å / min to a thickness of 600 Å.
/ Min of the electron transport layer 5 is formed. Further, an anode made of Mg or an alloy of Mg and Ag is formed on this.

The degree of vacuum during vapor deposition is about 1 × 10 ^-5 Torr.
Above, preferably about 2 × 10 ^{−7 to} 5 × 10 ⁻⁵ Torr. When it is 1 × 10 ⁻⁵ Torr or less, the film is deteriorated during the film formation of the electron injection electrode, and the carrier injection characteristic is deteriorated. The substrate temperature during vapor deposition of anthracene fluoride is about 0 to -30 ° C, preferably -5 ° C. By this temperature, a thin film having excellent film forming properties can be formed. The insulating layer 7 serves to electrically insulate the anode 2 and the cathode 6, but also serves as a selection mask when the organic light emitting layer 8 is formed.

The EL (electroluminescence) characteristics (light emission characteristics and electrical characteristics) of the organic electroluminescence device thus manufactured are shown in FIGS. 4 (a) and 4 (b). The characteristic experiment shows that the area of the light emitting element is 2 mm × 2 mm = 4 mm ² .
The applied voltage was 10 to 15 V, and the current was 200 mA / cm. An anthracene molecule was used for a light emitting element as a comparative example. According to FIGS. 4 (a) and 4 (b),
It becomes possible to obtain a brightness, for example, 500 cd / m ² and an injection current, for example, 200 mA / cm ² with a low driving voltage as compared with the comparative example, and further, with the same driving voltage, the light emitting device of the example. It can be seen that the injection current value and the luminance are higher, and the EL characteristics are better.

Next, the operation will be described. Since the anthracene compound thin film forming the organic light emitting layer 8 in FIG. 1 is composed of a group of microcrystals having a size of submicron or less and a flat surface, as compared with the anthracene thin film in which plate-like crystallites of submicron size are aggregated, Excellent film formation due to no precipitation and excellent brightness such as no decrease in brightness
L characteristics can be obtained.

Particularly when fluorinated anthracene is used among the anthracene / compounds, fluorinated anthracene is obtained by substituting all hydrogen atoms with fluorine atoms in the anthracene molecule, and the molecular orbital of the fluorinated anthracene molecule is obtained by substituting with fluorine. The energy levels of the highest occupied orbital (HOMO) and the lowest unoccupied orbital (LUMO) of each are lower than those of the anthracene molecule. By reducing the LUMO energy level, the electron affinity is increased, and the non-radiative deactivation rate from the electronically excited state of the fluorinated anthracene molecule is reduced, whereby excellent EL characteristics are obtained.

According to the structure of Example 1, by using the anthracene compound, particularly the fluorinated anthracene, in the organic light emitting layer 8, EL characteristics excellent in blue light emission characteristics and electron injection characteristics can be obtained, and the device can be manufactured. The deterioration of the element due to the decrease of heat generation inside is alleviated, the durability is improved, and the excellent film forming property is obtained.

Example 2. FIG. 1 is a diagram showing a cross section of an organic electroluminescent device according to an embodiment of the invention of claim 3. In the figure, the corresponding parts shown in FIG.
The description is omitted. The organic light emitting layer 8 has the same structure as the organic electroluminescent element described in Example 1 except that a thin film containing an anthracene compound shown below is used.

The organic light-emitting layer 8 is a thin film formed by doping an anthracene thin film with an anthracene compound in an amount of 0.1 to 5%, preferably about 1%.
A fluorinated anthracene represented by the structural formula (1) in which all the hydrogen atoms of the structural formula (1) are replaced by fluorinated atoms is used. The organic light emitting layer 8 is formed by doping anthracene (C ₁₄ H ₁₀ ) with anthracene fluoride (C ₁₄ F ₁₀ ) in an amount of 0.1 to 5%, preferably about 1%, and has a thickness of 700 Å. It is composed of a doped thin film (claim 4). In addition to the above-mentioned anthracene, a good thin film can be formed using a material that does not absorb light in the visible wavelength range of 400 to 700 nm.
For example, P-terphenyl, P-quaterphenyl, P
-Kinkiphenyl, polyvinylcarbazole, etc. can also be used. The anthracene fluoride-doped film is
It is preferable that about 1% of anthracene fluoride anthracene is dispersed as a single molecule in anthracene.

In the anthracene fluoride-doped film, anthracene and anthracene fluoride were placed in different crucibles (deposition sources), and the temperature of each crucible was set so that the deposition rate of anthracene was higher. , The crucible shutter is opened to simultaneously co-evaporate and deposit on the substrate (claim 8). In this case, the temperature of the anthracene crucible is 150 to 170 ° C, and the temperature of the fluorinated anthracene crucible is 125 to 135 ° C. The deposition rate of anthracene fluoride doped with anthracene is about 10
It is 0Å / min, and the deposition rate of anthracene fluoride alone is
It is about 1Å / min. The temperature of the substrate is -5 ° C.

Further, it is possible to deposit anthracene and anthracene fluoride in a single crucible in a predetermined mixing ratio. In the film formation in this case, the doping amount of anthracene fluoride is increased at first, and the doping amount is decreased later. Therefore, it is effective in providing the concentration distribution of anthracene fluoride in the anthracene fluoride-doped film.

As a film forming method other than the above vapor deposition method,
When the above-mentioned polymer material such as polyvinylcarbazole is used instead of anthracene, it is possible to form it as a cast film.

The EL characteristics of the organic electroluminescent device thus manufactured are shown in FIGS. 5 (a) and 5 (b). The experimental conditions are the same as in Example 1. According to this figure, it is possible to obtain a luminance of 500 cd / m ² and an injection current of 50 mA / cm ² with a low driving voltage, as compared with the comparative example.
Furthermore, the light emitting element of the example with the same drive voltage is
It can be seen that the EL characteristics are excellent because the injection current value and the brightness are high.

Next, the operation will be described. When the anthracene compound molecule is doped into the anthracene thin film by vapor deposition or the like, the anthracene compound molecule is dispersed as a single molecule in the anthracene thin film, so that excellent film formability and EL characteristics are obtained. In particular, when fluorinated anthracene is doped as the anthracene compound, the monomolecularly dispersed fluorinated anthracene molecule enters the molecular orbital of the anthracene molecule whose energy level has been lowered, and increases the electron affinity with the anthracene molecule, resulting in excellent EL. The characteristics are obtained.

According to the structure of Example 2, by doping the anthracene compound molecule, especially the fluorinated anthracene molecule, into the anthracene thin film, the anthracene thin film is dispersed as a single molecule and enters into the thin film, and has excellent film-forming property and blue color. Excellent EL characteristics can be obtained.

Example 3. FIG. 1 is a diagram showing a cross section of an organic electroluminescent device according to an embodiment of the invention of claim 5, and in the figure, corresponding parts shown in FIG.
The description is omitted. The organic light emitting layer 8 has the same structure as the electroluminescent device organically described in Example 1, except that a thin film containing an anthracene compound shown below is used.

The organic light emitting layer 8 is a thin film formed by doping an anthracene compound with a fluorescent molecule other than the anthracene compound. The anthracene compound is represented by the structural formula (1), and a fluorinated anthracene in which all the hydrogen atoms of the structural formula (1) are substituted with fluorine atoms is used (claim 6). The fluorescent molecule is represented by the following structural formula (2).

[0055]

[Chemical 3]

An oxadiazole-based compound is used. Examples of the oxadiazole-based compound include 2- (4'-
t-butylphenyl) -5- (4 ″ -biphenyl) 1,
3,4-oxadiazole is used. Furthermore, an organic phosphor material other than the above-mentioned oxadiazole-based compound can also be used.

Next, the operation will be described. When another fluorescent molecule is doped into an anthracene compound thin film composed of an aggregate of fine crystals having a size of submicron or less and a flat surface, the fluorescent molecule enters the anthracene compound fine crystals in a single molecule state. In particular, the use of fluorinated anthracene as the anthracene compound further enhances the intermolecular bond between the fluorinated anthracene and the fluorescent molecule. According to the configuration of Example 3, by forming an anthracene compound, particularly a fluoroanthracene thin film, with a fluorescent molecule other than the anthracene compound, excellent film-forming properties and excellent EL characteristics of blue color can be obtained. .

[0058]

As described above, according to the invention of claim 1, since the thin film of the anthracene compound represented by the structural formula (1) is formed as the light emitting layer of the organic electroluminescent device, excellent film forming property and There is an effect that excellent EL characteristics of blue are obtained.

According to the second aspect of the present invention, since the thin film of anthracene fluoride is formed as the light emitting layer of the organic electroluminescence device, there is an effect that excellent film formability and excellent EL characteristics of blue color can be obtained.

According to the invention of claim 3, since the anthracene thin film is doped with the anthracene compound represented by the structural formula (1) to form the light emitting layer of the organic electroluminescence device, excellent film-forming property and blue color are excellent. There is an effect that excellent EL characteristics can be obtained.

According to the invention of claim 4, since the anthracene thin film is doped with anthracene fluoride to form the light emitting layer of the organic electroluminescence device, excellent film-forming properties and excellent EL characteristics of blue are obtained. There is.

According to the invention of claim 5, a thin film of the anthracene compound represented by the structural formula (1) is doped with a fluorescent molecule other than the anthracene compound to form a light emitting layer of an organic electroluminescent device, which is excellent. Excellent film formability and blue color
There is an effect that the L characteristic is obtained.

According to the sixth aspect of the invention, since the fluorinated anthracene thin film is doped with a fluorescent molecule other than the anthracene compound to form the light emitting layer of the organic electroluminescent device, excellent film formability and excellent blue color are obtained. There is an effect that EL characteristics are obtained.

According to the invention of claim 7, the substrate temperature is from 0 to −
Since the anthracene compound, which is a functional group selected from the structural formula (1), is deposited by vacuum vapor deposition at 30 ° C. and a pressure of 1 × 10 ^{−7 to} 5 × 10 ⁻⁵ Torr, a light emitting layer having excellent film formability. There is an effect that can be obtained.

According to the eighth aspect of the invention, since the light emitting layer containing the anthracene compound represented by the structural formula (1) is deposited by co-evaporation, an excellent film forming property can be obtained.

According to the invention of claim 9, since the anthracene compound represented by the structural formula (1) or the light emitting layer containing the anthracene compound is constituted as the laser light emitting source of the laser oscillation device, blue of high brightness is stably maintained for a long time. It has the effect of emitting light.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an organic electroluminescent device having an organic light emitting layer according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing another organic electroluminescent device having an organic light emitting layer according to one embodiment of the invention of claims 1 to 6.

FIG. 3 is a cross-sectional view showing still another organic electric field device having an organic light emitting layer according to an embodiment of the invention of claims 1 to 6.

FIG. 4 is a graph showing the EL characteristics of the organic electroluminescent device according to the first and second embodiments of the present invention.

FIG. 5 is a graph showing the EL characteristics of the organic light emitting device according to one embodiment of the invention of claims 3 and 4.

FIG. 6 is a cross-sectional view showing an organic electroluminescent device including a conventional organic light emitting layer.

[Explanation of symbols]

 2 Anode (electrode) 3 Hole transport layer (carrier transport layer) 5 Electron transport layer (carrier transport layer) 6 Cathode (electrode) 8 Organic light emitting layer

Claims (9)

[Claims] 1. An organic electroluminescent device comprising a light emitting layer made of an organic compound, at least one carrier transporting layer, and an electrode for injecting carriers into the light emitting layer and the carrier transporting layer. The layers have the following structural formula: An organic electroluminescent device comprising a thin film of the anthracene compound represented by. 2. The organic electroluminescent device according to claim 1, wherein the anthracene compound is anthracene fluoride. 3. An organic electroluminescent device comprising a light emitting layer made of an organic compound, at least one carrier transport layer, and the light emitting layer and an electrode for injecting carriers into the carrier transport layer, wherein the light emitting layer is An organic electroluminescent device comprising an anthracene thin film doped with an anthracene compound represented by the structural formula (1). 4. The organic electroluminescence device according to claim 3, wherein the anthracene compound is anthracene fluoride, and the anthracene thin film is doped with about 0.1 to 5% of the anthracene fluoride. 5. An organic electroluminescence device comprising a light emitting layer made of an organic compound, at least one carrier transporting layer, and an electrode for injecting carriers into the light emitting layer and the carrier transporting layer. The layer is an organic electroluminescent device comprising a thin film of an anthracene compound represented by the structural formula (1) doped with a fluorescent molecule other than the anthracene compound. 6. The organic electroluminescent device according to claim 5, wherein the anthracene compound is anthracene fluoride. 7. An anthracene compound represented by the structural formula (1) or a light emitting layer containing an anthracene compound on a substrate,
In the method for producing an organic electroluminescent device, which comprises stacking at least one carrier transporting layer, an electrode for injecting carriers into the light emitting layer and the carrier transporting layer by a vacuum deposition method, a substrate temperature when depositing the organic compound About 0
To -30 ° C and the pressure is approximately 1 × 10 ^{-7 to} 5 × 10 ^-5
Torr is a method of manufacturing an organic electroluminescent device. 8. The method of manufacturing an organic electroluminescent device according to claim 7, wherein the light emitting layer containing the anthracene compound is formed by co-evaporation. 9. A laser provided with an organic light emitting device, which is formed by laminating an anthracene compound represented by the structural formula (1) or an organic light emitting layer containing the anthracene compound, a carrier transport layer, and an electrode acting as a resonator. Oscillator.