WO2003007333A1 - Verwendung eines uva-leuchtstoffs - Google Patents
Verwendung eines uva-leuchtstoffs Download PDFInfo
- Publication number
- WO2003007333A1 WO2003007333A1 PCT/DE2002/002142 DE0202142W WO03007333A1 WO 2003007333 A1 WO2003007333 A1 WO 2003007333A1 DE 0202142 W DE0202142 W DE 0202142W WO 03007333 A1 WO03007333 A1 WO 03007333A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- phosphor
- uva
- radiation
- discharge
- discharge lamp
- Prior art date
Links
Classifications
-
- 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
- C09K11/7715—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing cerium
- C09K11/7721—Aluminates
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/38—Devices for influencing the colour or wavelength of the light
- H01J61/42—Devices for influencing the colour or wavelength of the light by transforming the wavelength of the light by luminescence
- H01J61/44—Devices characterised by the luminescent material
Definitions
- the invention relates to the generation of UVA radiation with a phosphor according to the preamble of claim 1.
- UVA radiation can be generated by phosphors if they have been excited with shorter, wavy radiation. It is known to excite aluminate phosphors with conventional UV radiation from a low-pressure mercury discharge, that is to say from an Hg discharge (main excitation wavelength of approximately 254 nm). Reference is made to US 4 216 408, US 4 153 572 and US 4088922.
- the invention is based on the technical problem of specifying an expanded possibility for generating UVA radiation with a phosphor.
- the invention relates to the use of an aluminate phosphor described in more detail in claim 1 for excitation with short-wave UV radiation with a wavelength below 200 nm, so-called VUV radiation.
- the invention is also directed to a discharge lamp with the phosphor described, which is designed for VUV excitation of the phosphor, to a tanning device with such a discharge lamp and to the use of such a discharge lamp for photocatalytic cleaning.
- aluminate phosphor generally described in claim 1 is known as a substance. However, it was not previously known that this phosphor can be excited well in the VUV range. Rather, it has been assumed that the excitability decreases towards short UV wavelengths.
- the phosphor is generally characterized by the empirical formula Ce a -cYbRcMgdAl 11 O 1 6.5 + ⁇ , 5 (a + b) -0.5c + d, where R stands for Ba, Ca and / or Sr and for a, b, c, d applies: 0.14 ⁇ a ⁇ 1.00, 0 ⁇ b ⁇ 0.35, 0 ⁇ c ⁇ 0.5a, 0.45 ⁇ d ⁇ 2, a + b ⁇ l.
- the invention also relates to various preferred higher lower limits or lower upper limits for the parameters a, b, c and d, which are reproduced below:
- the O portion can deviate somewhat from the specified parameter 11, for example go to about 12.
- the excitation can preferably take place with a wavelength in the range between 145 and 185 nm, because the phosphor shows a favorable course of the excitability curve in this range.
- Such radiation can be generated, for example, by an Xe excimer discharge.
- Such discharges have been generated in the past few years with dielectrically impeded discharges, for which reference is made to the relevant prior art.
- the dielectrically impeded discharges can be generated with a particularly high degree of efficiency using a pulsed operating method, in that typical discharge structures with a comparatively low current density are formed which, moreover, enable radiation that is both homogeneous in terms of time and location.
- US Pat. No. 5,714,835. If an Xe excimer discharge, for example of Xe 2 *, is used in this way, molecular band radiation in the range of approximately 172 nm occurs, that is to say in the preferred excitation range mentioned. This radiation affects the range of the optimal excitability of the phosphor according to the invention relatively well.
- a preferred aspect of the invention is directed to the fact that the UVA radiation generated by the described phosphor is used to excite a further phosphor.
- This can be of interest if, on the one hand, a certain UVA-stimulable phosphor is of interest, and on the other hand, the advantages of, for example, a pulsed dielectric barrier discharge are to be exploited.
- This is also of interest if a phosphor is to be excited at a point to which the discharge that generates the VUV radiation cannot be coupled directly.
- the VUV radiation is strongly absorbed by air and can therefore can only be relayed by vacuum. However, this does not apply to UVA radiation.
- UVA radiation can be generated with the phosphor according to the invention via a VUV excitation and this UVA radiation from the UVA lamp thus formed are transferred from the air or possibly other media to the UVA-stimulable phosphor.
- This can be of interest if the known advantages of a dielectrically impeded discharge compared to a conventional Hg discharge are of interest. These advantages include the fact that the luminance of the discharge is hardly temperature-dependent, so there is practically no start-up behavior and the discharge lamps also have an extraordinarily high switching stability and service life.
- the UVA range in question is at wavelengths of around 300-380 nm.
- the invention relates not only to the use of the aluminate phosphor described for excitation with short-wave UV radiation (wavelength ⁇ 200 nm), but also to discharge lamps in which VUV excitation can take place and that with the aluminate phosphor described are provided.
- Such discharge lamps can find various preferred applications. They can be designed, for example, as a signaling device or, in the manner described, as an excitation source for a display operated with UVA-stimulable phosphors. But they can also be designed as UVA emitters, for example for a tanning device that should also be protected. In the case of sunlamps, solariums and comparable tanning facilities, UVA radiation is required and is also available the flat design achievable with dielectrically disabled discharge lamps. In addition, a precise control of the emitted dose is necessary there, so that the start-up behavior of conventional discharges is disruptive. In addition, a long service life and very good maintenance are of interest in this area of application. In addition, for environmental reasons, it is desirable not to bring the element Hg into circulation in products wherever possible.
- Another aspect of the invention relates to the use of the aforementioned UVA lamp for photocatalytic cleaning. Namely, it has been shown that this UVA lamp is particularly suitable for this, in particular if titanium oxide is used as the catalyst. Such a catalyst is suitable for breaking up carbon compounds, in particular soot, when irradiated with the UVA lamp.
- the curve is normalized in the usual way to the values of Na salycilate.
- the irregular curve at around 165 nm is measurement-related and results from an overload due to the resonance peak of the exciting deuterium lamp. It can clearly be seen that the excitability drops sharply between 230 nm and 220 nm, as was already known per se. However, it rises again between 200 nm and 180 nm to values that are practically equivalent to those in the range around 250 nm.
- the excitability is very high, especially in the wavelength range of interest for the Xe 2 * discharge. In contrast, the drop to lower wavelengths below 150 nm plays no role.
- ⁇ stands for the radiation flux, namely for the new lamps, after 100 operating hours, 500 operating hours and 1,000 operating hours, whereby on the one hand the direct measured values are shown in relative units and on the other hand the values normalized to the initial value are shown in percent after the passage of time. The determined values for maintenance and diversification are assessed as favorable.
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002422511A CA2422511A1 (en) | 2001-07-13 | 2002-06-12 | Use of a uva illuminant |
KR10-2003-7003635A KR20040030407A (ko) | 2001-07-13 | 2002-06-12 | Uva 인광의 용도 |
JP2003513005A JP2004521183A (ja) | 2001-07-13 | 2002-06-12 | Uva蛍光体の使用法 |
US10/380,239 US20040012325A1 (en) | 2001-07-13 | 2002-06-12 | Use of a uva illuminant |
EP02742806A EP1407473A1 (de) | 2001-07-13 | 2002-06-12 | Verwendung eines uva-leuchtstoffs |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10133411A DE10133411A1 (de) | 2001-07-13 | 2001-07-13 | Verwendung eines UVA-Leuchtstoffs |
DE10133411.7 | 2001-07-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003007333A1 true WO2003007333A1 (de) | 2003-01-23 |
Family
ID=7691233
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2002/002142 WO2003007333A1 (de) | 2001-07-13 | 2002-06-12 | Verwendung eines uva-leuchtstoffs |
Country Status (8)
Country | Link |
---|---|
US (1) | US20040012325A1 (de) |
EP (1) | EP1407473A1 (de) |
JP (1) | JP2004521183A (de) |
KR (1) | KR20040030407A (de) |
CA (1) | CA2422511A1 (de) |
DE (1) | DE10133411A1 (de) |
TW (1) | TWI229121B (de) |
WO (1) | WO2003007333A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10324832A1 (de) * | 2003-06-02 | 2004-12-23 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Entladungslampe mit Leuchtstoff |
US8152586B2 (en) | 2008-08-11 | 2012-04-10 | Shat-R-Shield, Inc. | Shatterproof light tube having after-glow |
JP5370299B2 (ja) * | 2009-12-16 | 2013-12-18 | ウシオ電機株式会社 | 蛍光ランプ |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4088922A (en) * | 1976-08-30 | 1978-05-09 | Gte Sylvania Incorporated | Cerium magnesium aluminate luminescent compositions, and lamps utilizing same |
US4153572A (en) * | 1978-06-14 | 1979-05-08 | Gte Sylvania Incorporated | Ultraviolet emitting CeYMg aluminate fluorescent lamp phosphor for psoriasis treatment |
JP2001107043A (ja) * | 1999-10-08 | 2001-04-17 | Daiden Co Ltd | 紫外線または真空紫外線励起青色蛍光体 |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL160869C (nl) * | 1972-11-03 | Philips Nv | Luminescerend scherm, alsmede ontladingslamp en katho- de straalbuis, voorzien van een dergelijk scherm. | |
IT1132065B (it) * | 1979-06-15 | 1986-06-25 | Gte Prod Corp | Fosforo alluminato emettitore di raggi ultravioletti e lampade fluorescenti per l'abbronzatura artificiale utilizzanti tale fosforo |
US4246630A (en) * | 1979-12-19 | 1981-01-20 | Gte Products Corporation | Ultraviolet emitting Ce alkaline earth aluminate lamp phosphors and lamps utilizing same |
KR950006429B1 (ko) * | 1992-03-26 | 1995-06-15 | 삼성전관주식회사 | 칼라 플라즈마 디스플레이 패널 |
DE4311197A1 (de) * | 1993-04-05 | 1994-10-06 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Verfahren zum Betreiben einer inkohärent strahlenden Lichtquelle |
US6045721A (en) * | 1997-12-23 | 2000-04-04 | Patent-Treuhand-Gesellschaft Fur Elekrische Gluhlampen Mbh | Barium magnesium aluminate phosphor |
EP0932185A1 (de) * | 1997-12-23 | 1999-07-28 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Signallampe und Leuchtstoffe dazu |
DE10009915A1 (de) * | 2000-03-01 | 2001-09-27 | Philips Corp Intellectual Pty | Plasmabildschirm mit UV-Licht emittierender Schicht |
DE10023504A1 (de) * | 2000-05-13 | 2001-11-15 | Philips Corp Intellectual Pty | Edelgas-Niederdruck-Entladungslampe, Verfahren zum Herstellen einer Edelgas-Niederdruck-Entladungslampe Lampe sowie Verwendung einer Gasentladungslampe |
DE10026913A1 (de) * | 2000-05-31 | 2001-12-06 | Philips Corp Intellectual Pty | Gasentladungslampe mit Leuchtstoffschicht |
JP4244265B2 (ja) * | 2000-07-03 | 2009-03-25 | 化成オプトニクス株式会社 | アルミン酸塩蛍光体、蛍光体ペースト組成物並びに真空紫外線励起発光装置 |
-
2001
- 2001-07-13 DE DE10133411A patent/DE10133411A1/de not_active Withdrawn
-
2002
- 2002-06-12 EP EP02742806A patent/EP1407473A1/de not_active Withdrawn
- 2002-06-12 WO PCT/DE2002/002142 patent/WO2003007333A1/de not_active Application Discontinuation
- 2002-06-12 US US10/380,239 patent/US20040012325A1/en not_active Abandoned
- 2002-06-12 KR KR10-2003-7003635A patent/KR20040030407A/ko not_active Application Discontinuation
- 2002-06-12 CA CA002422511A patent/CA2422511A1/en not_active Abandoned
- 2002-06-12 JP JP2003513005A patent/JP2004521183A/ja active Pending
- 2002-06-28 TW TW091114311A patent/TWI229121B/zh not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4088922A (en) * | 1976-08-30 | 1978-05-09 | Gte Sylvania Incorporated | Cerium magnesium aluminate luminescent compositions, and lamps utilizing same |
US4153572A (en) * | 1978-06-14 | 1979-05-08 | Gte Sylvania Incorporated | Ultraviolet emitting CeYMg aluminate fluorescent lamp phosphor for psoriasis treatment |
JP2001107043A (ja) * | 1999-10-08 | 2001-04-17 | Daiden Co Ltd | 紫外線または真空紫外線励起青色蛍光体 |
Non-Patent Citations (2)
Title |
---|
DATABASE WPI Section Ch Week 200164, Derwent World Patents Index; Class E37, AN 2001-567513, XP002214021 * |
See also references of EP1407473A1 * |
Also Published As
Publication number | Publication date |
---|---|
JP2004521183A (ja) | 2004-07-15 |
US20040012325A1 (en) | 2004-01-22 |
CA2422511A1 (en) | 2003-01-23 |
TWI229121B (en) | 2005-03-11 |
KR20040030407A (ko) | 2004-04-09 |
DE10133411A1 (de) | 2003-01-23 |
EP1407473A1 (de) | 2004-04-14 |
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