WO2002100976A1 - Compose a base d'un alcalino-terreux, de soufre et d'aluminium, de gallium ou d'indium, son procede de preparation et son utilisation comme luminophore - Google Patents
Compose a base d'un alcalino-terreux, de soufre et d'aluminium, de gallium ou d'indium, son procede de preparation et son utilisation comme luminophore Download PDFInfo
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- WO2002100976A1 WO2002100976A1 PCT/FR2002/002010 FR0202010W WO02100976A1 WO 2002100976 A1 WO2002100976 A1 WO 2002100976A1 FR 0202010 W FR0202010 W FR 0202010W WO 02100976 A1 WO02100976 A1 WO 02100976A1
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- compound
- compound according
- dopant
- gallium
- oxide
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
- C09K11/7729—Chalcogenides
- C09K11/7731—Chalcogenides with alkaline earth metals
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/64—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing aluminium
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7701—Chalogenides
- C09K11/7703—Chalogenides with alkaline earth metals
Definitions
- the present invention relates to a compound based on an alcahno-earthy, sulfur and aluminum, gallium or indium, its preparation process and its use as a phosphor
- alkaline earth thiogallates there are known in particular the alkaline earth thiogallates. These products can be prepared in particular by atomization of a solution or of a suspension of the constituent elements of the thiogallate other than sulfur and then by sulfurization of the atomized product.
- the compound of the invention is a compound based on at least one element A chosen from alcahno-earths, d '' at least one element B chosen from aluminum, gallium or indium, sulfur and a dopant capable of imparting luminescence properties to said compound, and it is characterized in that it is in the form of a mixture of a majority crystallographic phase of type AB 2 S 4 and of a crystallographic phase of type B 2 S3
- a solution or a suspension is formed comprising salts or soils of the elements A, B and the dopant, in a proportion such that the atomic ratio B / (A + dopant) is at least 2.06,
- the invention relates to the use as phosphor, in particular in cathodoluminescence, of a compound uTi as described above.
- - Figure 1 is an RX diagram of a compound according to the invention
- - Figure 2 is an RX diagram of a compound according to the prior art
- the compound of the invention is based on the elements A, B, sulfur and a dopant
- A is an alkaline earth metal (group lia of the periodic table) A can be very particularly strontium A can also be magnesium, calcium or barium
- B can be aluminum, gallium or indium B can be more particularly gallium
- the invention also relates to the compounds in which A represents several alkaline earths.
- B can represent a combination of at least two of the elements aluminum, gallium or indium.
- the compound of the invention comprises one or more dopants ICI is understood to mean HERE dopant any element which can confer luminescence properties on the compound of the invention
- dopants are well known in the art concerned HERE Without wishing to be limited by a theory, it is possible to think that the dopant comes in substitution for the alkaline earth A
- the amount of dopant is usually at most 10 atomic% relative to the alkaline earth element More particularly, this dopant can be chosen from divalent manganese, the divalent rare earths and the group comprising the t ⁇ valent rare earths in combination with an alkali In the case of t ⁇ valent rare earths, the presence of an alkali is necessary to compensate for the excess charge due to the rare earth
- the alkali may be more particularly sodium Rare earth means the elements of the group consisting of ytt ⁇ um and the elements of the periodic classification of atomic number e inclusive between 57 and 71
- the dopant can more particularly be europium it, ytterbium II or ce ⁇ um III in combination with an alkali.
- the compound of the invention is a doped strontium thiogallate, this dopant being able to be very particularly europium ii
- the essential characteristic of the compound of the invention is its crystallographic structure as demonstrated by X-ray diffraction More specifically, the compound of the invention has a majority crystallographic phase of type AB 2 S and a crystallographic phase of type B 2 S3 The respective proportions of these phases may vary The type B 2 S3 phase must be present in a sufficient proportion to be able to be highlighted on an X-ray diagram
- phase B 2 S 3 will depend on the respective amounts of elements A, B and of dopant used during the preparation of the compound.
- the compound of the invention can be obtained by a process in which it is used the elements A, B and the dopant in a proportion such that the atomic ratio B / (A + dopant) is at least 2.06, preferably at least 2.1 This ratio can be more particularly between 2.06 and 2.25.
- the compound of the invention may also have a certain number of additional characteristics which will now be described.
- the compound can consist of particles of average size of at most 10 ⁇ m.
- the size and particle size characteristics are measured by the laser diffraction technique (volume distribution).
- the compound may have a tight particle size distribution.
- the dispersion index ⁇ / m is at most 0.7 II can more particularly be at most 0.6.
- dispersion index the ratio ⁇ / m (d 84 -d 16 ) / 2d 50 in which
- - d 8 is the particle diameter for which 84% of the particles have a diameter less than d 84 - d 16 is the particle diameter for which 16% of the particles have a diameter less than d 16
- the compounds of the invention may consist of particles of substantially spherical shape and the diameter of which corresponds to the average sizes which have been given above.
- the compound of the invention can have a low residual oxygen content.
- This residual content can be at most 1.5%, more particularly at most 1% It is expressed by weight of oxygen relative to the total weight of the compound
- the particles constituting the compound can also comprise a transparent oxide coating layer, preferably uniform and of controlled thickness
- transparent oxide is meant HERE an oxide which, once deposited on the particle in the form of a more or less fine film, absorbs little or no light rays in the visible range.
- oxide which is used for convenience throughout this description concerning this variant, should be understood as also covering oxides of the hydrated type
- oxides or hydrated oxides, can be amorphous and / or crystallized
- the coating layer is based on silica Even more advantageously, this layer is essentially, and preferably only, made of silica A process for preparing the compound of the invention will now be described
- the first step of this process consists in forming a solution or a suspension comprising salts or soils of the elements A, B and the dopant
- Inorganic salts are usually used such as nitrates, sulfates or chlorides or hydroxides.
- Organic salts can optionally be used, but it is preferable in this case to use salts having few carbon atoms, such as acetates.
- the salts are placed in a liquid medium, preferably water, to form a solution or a suspension
- a liquid medium preferably water
- an amount of reagents is used such that the element B is in excess with respect to the stoichiometry
- the atomic ratio B / (A + dopant) must be at least 2.06, preferably at least 2.1 This ratio can be more particularly between 2.06 and 2.25
- the next step is to dry the solution or suspension previously prepared. This drying is done by atomization
- spray-drying means spray-drying the mixture in a hot atmosphere (spray-drying).
- the spraying can be carried out using any sprayer known per se, for example by a spray nozzle of the sprinkler type or other One can also use so-called turbine atomizers.
- the gases thus in fact have a double function of firstly the spraying, ie the transformation into fine droplets, of the initial mixture, and secondly the drying of the droplets obtained.
- the extremely short residence time (generally less than about 1/10 of a second) of the particles in the reactor have the advantage, among other things, of limiting possible risks of overheating as a result of too long contact with hot gases.
- This consists of a combustion chamber and a contact chamber composed of a bicone or a truncated cone, the upper part of which diverges.
- the combustion chamber opens into the contact chamber through a reduced passage.
- the upper part "of the combustion chamber is provided with an opening allowing the introduction of the combustible phase
- the combustion chamber comprises an internal coaxial cylinder, thus defining inside thereof a central zone and an annular peripheral zone, having perforations lying for the most part towards the upper part of the appliance.
- room includes at least six perforations distributed on at least one circle, but preferably on several circles spaced axially
- the total area of the perforations located in the lower part of the chamber can be very small, of the order of 1/10 to 1/100 of the total area of the perforations of said internal coaxial cylinder
- the perforations are usually circular and have a very small thickness
- the ratio of the diameter of these to the thickness of the wall is at least 5, the minimum thickness of the wall being only limited by mechanical requirements
- a bent pipe opens into the reduced passage, the end of which opens in the axis of the central zone
- the gas phase animated by a helical movement (hereinafter called helical phase) is composed of a gas, generally air, introduced into an orifice made in the annular zone, preferably this orifice is located in the lower part of said zone
- the gas phase is preferably introduced at low pressure into the abovementioned orifice, that is to say at a pressure less than 1 bar and more particularly at a pressure between 0.2 and 0.5 bar above the pressure existing in the contact chamber
- the speed of this helical phase is generally between 10 and 100 m / s and preferably between 30 and 60 m / s
- a combustible phase which may in particular be methane, is injected axially through the aforementioned opening in the central zone at a speed of approximately 100 to 150 m / s.
- the combustible phase is ignited by any known means, in the region where the fuel and the helical phase are in contact
- the mixture to be treated is then introduced in the form of liquid through the aforementioned pipe.
- the liquid is then divided into a multitude of drops, each of which is transported by a volume of gas and subjected to a movement creating a centrifugal effect.
- the flow liquid is between 0.03 and 10 m / s
- the ratio between the proper amount of movement of the helical phase and that of the liquid mixture must be high. In particular it is at least 100 and preferably between 1000 and 10000
- the amounts of movement at the level of the reduced passage are calculated as a function of the inlet flow rates of the gas and of the mixture to be treated, as well as of the section of said passage. size of the drops Under these conditions, the proper movement of the gases is imposed in its direction and its intensity on the drops of the mixture to be treated, separated from each other in the zone of convergence of the two streams
- the speed of the liquid mixture is further reduced at minimum necessary to obtain a continuous flow
- the atomization is generally done with an outlet temperature of the solid between 90 ° C and 300 ° C
- the product thus obtained at the end of the atomization can be optionally deagglomerated, for example by micronization
- the last step of the process consists of sulfurizing the product obtained after drying
- This sulphurization can be carried out by reacting the product obtained in the previous step with carbon sulphide, hydrogen sulphide or with a mixture of hydrogen sulphide and carbon sulphide
- the sulphurization reaction is carried out at a temperature between 600 ° C and 1000 ° C, preferably between 800 ° C and 900 ° C
- the respective proportions of CS2 and H2S can vary within wide limits
- the flow rate of sulfurizing gas (CS2, H2S or CS2 and H2S) is chosen so that the amount of CS2 and / or H2S injected into the system during the reaction, i.e. between the start of the temperature rise (start of the thermal cycle) and the end of the high temperature plateau is sufficient to transform all of the sulfide precursor
- a molar ratio ([sulfurizing gas] / [A] + [B]) greater than 4 meets this requirement
- the sulfurizing gas can be used with an inert gas such as argon or nitrogen
- the duration of the reaction corresponds to the time necessary to obtain the desired sulfide
- the preparation process essentially consists in bringing the initial compound into contact with a precursor of the above-mentioned transparent oxide and in precipitating the transparent oxide.
- the term “initial compound” is intended to mean the compound as obtained following the preparation and sulfurization process described above and after possible disagglomeration.
- silica mention may be made of the preparation of silica by hydrolysis of an alkyl silicate, by forming a reaction medium by mixing water, alcohol, the compound which is then suspended, and optionally d a base, an alkali fluoride or an ammonium fluoride which can act as a catalyst for the condensation of silicate. The alkyl silicate is then introduced.
- a preparation can also be carried out by reaction of the compound, of a silicate, of the alkaline silicate type, and of an acid.
- the compound, an aluminate and an acid can be reacted, whereby alumina is precipitated.
- This precipitation can also be obtained by bringing together and reacting the compound, an aluminum salt and a base.
- alumina can be formed by hydrolysis of an aluminum alcoholate.
- titanium oxide it can be precipitated by introducing into a hydroalcoholic suspension of the compound a titanium salt on the one hand such as TiCl TiOCl2 or T1OSO4, and a base on the other hand.
- a titanium salt on the one hand such as TiCl TiOCl2 or T1OSO4, and a base on the other hand.
- zirconium oxide-based layer it is possible to proceed by cohydrolysis or co-precipitation of a suspension of the compound in the presence of an organometallic compound of zirconium, for example a zirconium alkoxide such as 'zirconium isopropoxide.
- an organometallic compound of zirconium for example a zirconium alkoxide such as 'zirconium isopropoxide.
- the compound of the invention can be used as a phosphor, in particular in cathodoluminescence, that is to say in applications implementing excitations of the electronic type. In this case, it can be used in the manufacture of any device operating under this principle such as FED or VFD flat screens, projection screens, television screens.
- This compound can also be used as a photoluminescent phosphor, for example in pcLEDs (phosphors converted Light Emission Diode) where the excitation can be between 350nm and 470nm.
- the compounds of the invention are used in this type of device using well known techniques, for example by deposition on screens by sedimentation, screen printing or electrophoresis.
- the invention finally applies to the aforementioned devices implementing cathodoluminescence or photoluminescence and comprising a compound according to the invention
- the granulomét ⁇ e was determined according to the aforementioned laser technique using a Coulter ® LS 230 is pointed out in addition that the measurement was carried out on a dispersion of the product in an aqueous solution at 0, 1% by weight of sodium hexametaphosphate and which has previously undergone a passage with the ultrasonic probe (probe with tip of 13mm in diameter, 20KHz, 120W) for 3 minutes
- Photoluminescence measurements are carried out using a light source which emits between 200 and 800 nm.
- the measuring device comprises, in excitation, a double monochromator placed before the sample so that the excitation of the sample is monochromatic.
- the performance measurements are carried out by comparing the intensity of the emission spectra at the maximum of the emission peak (533 nm)
- the shape and the spectral position of the emission spectrum are independent of the chemical composition of the product and the length excitation wave throughout the spectral range studied Only the intensity of the spectrum is modified
- This emission corresponds to the 4f-5d band of divalent europium in an SrGa 2 S 4 environment
- the emission spectra are obtained by fixing the excitation wavelength at 254nm and 460nm These spectra are corrected for the absorption of the networks present in the spectrofluo ⁇ meter and for the variation in sensitivity of the photomultiphcator
- a mixture of gallium nitrates, strontium and europium in the proportions corresponding to those of the desired compound is atomized on a LEA 100® device of the "flash" reactor type described above.
- the air inlet temperature is 500 ° C while the air outlet temperature is 200 ° C
- the reaction gas consists of argon (52% by volume), CS2 (23%) and H2S (25%).
- the flow rate of the gas mixture is 1.71 / min.
- the thermal cycle is as follows: rise to 8 ° C / min from ambient to 870 ° C then level 10 minutes, then lower to 5 ° C / min under argon.
- the product is in the form of a powder mainly containing the SrGa 2 S 4 phase and traces of the Ga 2 S 3 phase.
- the corresponding RX diagram is that of FIG. 1, the line 100 being identified by an arrow.
- the average particle size is 3.4 ⁇ m.
- the dispersion index is 0.6.
- Example 1 has, compared to that of Example 2, a photoluminescence yield at 254nm and 460nm which is multiplied by 1.7 for each of these two wavelengths.
- Example 2 The procedure is as in Example 1 but varying the amount of gallium.
- gallium is used in the proportions corresponding to those of the compounds (Srrj 95EU0 05) G a 2 + ⁇ S4 in which the values of x are 0.06; 0.14 and 0.2 respectively.
- the products are in the form of a powder mainly containing the SrGa 2 S 4 phase and traces of the Ga 2 S3 phase.
- the line 100 of the Ga 2 S 3 phase detected in RX has an increasing intensity when x varies from 0.06 to 0.2.
- the photoluminescence yields at 254 nm of these products are compared with that of Example 2.
- the yield is multiplied by 1.6; 1, 7 and 1, 7 respectively with respect to the product of the comparative example. Yields at 460nm are multiplied by the same respective factors.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02745516A EP1399525B1 (fr) | 2001-06-13 | 2002-06-12 | Compose a base d'un alcalino-terreux, de soufre et d'aluminium, de gallium ou d'indium, son procede de preparation et son utilisation comme luminophore |
DE60223248T DE60223248T2 (de) | 2001-06-13 | 2002-06-12 | Verbindung auf der basis von erdalkali, schwefel und aluminium, gallium oder indium, verfahren zu seiner herstellung und seine verwendung als luminophor |
KR10-2003-7016267A KR100527021B1 (ko) | 2001-06-13 | 2002-06-12 | 알칼리 토금속, 황, 및 알루미늄, 갈륨 또는 인듐을기재로 하는 화합물, 그의 제조 방법, 및 인광체로서 그의용도 |
JP2003503731A JP3983734B2 (ja) | 2001-06-13 | 2002-06-12 | アルカリ土類金属と硫黄とアルミニウム、ガリウム又はインジウムとを基材とする化合物、その製造法及び蛍光体としてのその使用 |
CA002450286A CA2450286C (fr) | 2001-06-13 | 2002-06-12 | Compose a base d'un alcalino-terreux, de soufre et d'aluminium, de gallium ou d'indium, son procede de preparation et son utilisation comme luminophore |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0107733A FR2826016B1 (fr) | 2001-06-13 | 2001-06-13 | Compose a base d'un alcalino-terreux, de soufre et d'aluminium, de gallium ou d'indium, son procede de preparation et son utilisation comme luminophore |
FR01/07733 | 2001-06-13 |
Publications (1)
Publication Number | Publication Date |
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WO2002100976A1 true WO2002100976A1 (fr) | 2002-12-19 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/FR2002/002010 WO2002100976A1 (fr) | 2001-06-13 | 2002-06-12 | Compose a base d'un alcalino-terreux, de soufre et d'aluminium, de gallium ou d'indium, son procede de preparation et son utilisation comme luminophore |
Country Status (9)
Country | Link |
---|---|
US (2) | US6773629B2 (fr) |
EP (1) | EP1399525B1 (fr) |
JP (1) | JP3983734B2 (fr) |
KR (1) | KR100527021B1 (fr) |
AT (1) | ATE377063T1 (fr) |
CA (1) | CA2450286C (fr) |
DE (1) | DE60223248T2 (fr) |
FR (1) | FR2826016B1 (fr) |
WO (1) | WO2002100976A1 (fr) |
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FR2755122A1 (fr) * | 1996-10-31 | 1998-04-30 | Rhodia Chimie Sa | Compose a base d'un alcalino-terreux, de soufre et d'aluminium, de gallium ou d'indium, son procede de preparation et son utilisation comme luminophore |
WO2001095400A1 (fr) * | 2000-06-09 | 2001-12-13 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Substance fluorescente de haute efficacite |
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FR2257326B1 (fr) | 1973-06-19 | 1976-05-28 | Rhone Progil | |
FR2419754A1 (fr) | 1978-03-14 | 1979-10-12 | Rhone Poulenc Ind | Dispositif pour la mise en contact de substances se presentant sous au moins deux phases differentes |
FR2431321A1 (fr) | 1978-07-21 | 1980-02-15 | Rhone Poulenc Ind | Procede de traitement de substances se presentant sous des phases differentes, tel que traitement de substances sous forme liquide, semi-liquide, ou pateuse, par une autre phase notamment gazeuse |
JPH0272592A (ja) * | 1988-09-06 | 1990-03-12 | Tosoh Corp | 薄膜el素子 |
JP2858397B2 (ja) * | 1994-09-07 | 1999-02-17 | 株式会社デンソー | エレクトロルミネッセンス素子及びその製造方法 |
DE20108873U1 (de) * | 2001-05-29 | 2001-12-06 | Osram Opto Semiconductors Gmbh | Hocheffizienter Leuchtstoff |
US7125501B2 (en) * | 2003-04-21 | 2006-10-24 | Sarnoff Corporation | High efficiency alkaline earth metal thiogallate-based phosphors |
-
2001
- 2001-06-13 FR FR0107733A patent/FR2826016B1/fr not_active Expired - Fee Related
- 2001-09-10 US US09/948,761 patent/US6773629B2/en not_active Expired - Lifetime
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2002
- 2002-06-12 CA CA002450286A patent/CA2450286C/fr not_active Expired - Fee Related
- 2002-06-12 JP JP2003503731A patent/JP3983734B2/ja not_active Expired - Fee Related
- 2002-06-12 DE DE60223248T patent/DE60223248T2/de not_active Expired - Lifetime
- 2002-06-12 AT AT02745516T patent/ATE377063T1/de not_active IP Right Cessation
- 2002-06-12 KR KR10-2003-7016267A patent/KR100527021B1/ko not_active IP Right Cessation
- 2002-06-12 EP EP02745516A patent/EP1399525B1/fr not_active Expired - Lifetime
- 2002-06-12 WO PCT/FR2002/002010 patent/WO2002100976A1/fr active IP Right Grant
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2004
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EP0667383A2 (fr) * | 1994-02-14 | 1995-08-16 | Planar Systems, Inc. | Procédé de déposition réactive par sources multiples pour la préparation de couches luminescentes émettant dans le bleu pour dispositifs TFEL en courrant alternatif |
EP0720418A1 (fr) * | 1994-07-04 | 1996-07-03 | Nippon Hoso Kyokai | Couche formee d'un compose ternaire et procede de production de cette couche |
FR2755122A1 (fr) * | 1996-10-31 | 1998-04-30 | Rhodia Chimie Sa | Compose a base d'un alcalino-terreux, de soufre et d'aluminium, de gallium ou d'indium, son procede de preparation et son utilisation comme luminophore |
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LE THI K T ET AL: "INVESTIGATION OF THE MS-AL2S3 SYSTEMS (M=CA, SR, BA) AND LUMINESCENCE PROPERTIES OF EUROPIUM-DOPED THIOALUMINATES", MATERIALS SCIENCE AND ENGINEERING B, ELSEVIER SEQUOIA, LAUSANNE, CH, vol. B14, no. 4, 1 September 1992 (1992-09-01), pages 393 - 397, XP000359265, ISSN: 0921-5107 * |
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JP2006524437A (ja) * | 2003-04-21 | 2006-10-26 | サーノフ・コーポレーション | 高効率アルカリ土類金属チオガレートベースの蛍光体を使用する方法およびデバイス |
Also Published As
Publication number | Publication date |
---|---|
FR2826016B1 (fr) | 2004-07-23 |
US20020190241A1 (en) | 2002-12-19 |
FR2826016A1 (fr) | 2002-12-20 |
DE60223248D1 (de) | 2007-12-13 |
CA2450286A1 (fr) | 2002-12-19 |
US6773629B2 (en) | 2004-08-10 |
JP3983734B2 (ja) | 2007-09-26 |
EP1399525B1 (fr) | 2007-10-31 |
EP1399525A1 (fr) | 2004-03-24 |
JP2004529261A (ja) | 2004-09-24 |
KR100527021B1 (ko) | 2005-11-09 |
CA2450286C (fr) | 2009-11-24 |
ATE377063T1 (de) | 2007-11-15 |
US6926848B2 (en) | 2005-08-09 |
KR20040012924A (ko) | 2004-02-11 |
DE60223248T2 (de) | 2008-08-14 |
US20040140454A1 (en) | 2004-07-22 |
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