JPH03295194A - Manufacture of electroluminescence (el) phosphor - Google Patents
Manufacture of electroluminescence (el) phosphorInfo
- Publication number
- JPH03295194A JPH03295194A JP2095875A JP9587590A JPH03295194A JP H03295194 A JPH03295194 A JP H03295194A JP 2095875 A JP2095875 A JP 2095875A JP 9587590 A JP9587590 A JP 9587590A JP H03295194 A JPH03295194 A JP H03295194A
- Authority
- JP
- Japan
- Prior art keywords
- activating agent
- phosphor
- activator
- bromine
- zns
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims description 15
- 238000005401 electroluminescence Methods 0.000 title 1
- 239000005083 Zinc sulfide Substances 0.000 claims abstract description 18
- 229910052984 zinc sulfide Inorganic materials 0.000 claims abstract description 18
- 239000010949 copper Substances 0.000 claims abstract description 12
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims abstract description 7
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910052794 bromium Inorganic materials 0.000 claims abstract description 6
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052801 chlorine Inorganic materials 0.000 claims abstract description 5
- 239000000460 chlorine Substances 0.000 claims abstract description 5
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000011630 iodine Substances 0.000 claims abstract description 4
- 229910052740 iodine Inorganic materials 0.000 claims abstract description 4
- 239000012190 activator Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 10
- 238000010304 firing Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000011572 manganese Substances 0.000 abstract description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052748 manganese Inorganic materials 0.000 abstract description 2
- 229910052709 silver Inorganic materials 0.000 abstract description 2
- 239000004332 silver Substances 0.000 abstract description 2
- 239000003795 chemical substances by application Substances 0.000 abstract 8
- 230000003213 activating effect Effects 0.000 abstract 5
- 238000005530 etching Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- SWLVFNYSXGMGBS-UHFFFAOYSA-N ammonium bromide Chemical compound [NH4+].[Br-] SWLVFNYSXGMGBS-UHFFFAOYSA-N 0.000 description 2
- 230000003081 coactivator Effects 0.000 description 2
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- KXJGSNRAQWDDJT-UHFFFAOYSA-N 1-acetyl-5-bromo-2h-indol-3-one Chemical compound BrC1=CC=C2N(C(=O)C)CC(=O)C2=C1 KXJGSNRAQWDDJT-UHFFFAOYSA-N 0.000 description 1
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 1
- 238000000635 electron micrograph Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-M iodide Chemical compound [I-] XMBWDFGMSWQBCA-UHFFFAOYSA-M 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Electroluminescent Light Sources (AREA)
- Luminescent Compositions (AREA)
Abstract
Description
本発明は、厚膜ＥＬ素子に用いるＥＬ蛍光体の製造方法
に関するものである。The present invention relates to a method for manufacturing an EL phosphor used in a thick film EL device.
周知の通り、ＥＬ素子は、薄形で低消費電力の面光源と
して液晶表示装置のバックライト光源、計器盤照明用光
源、複写機用光源、装飾用光源などに使用されている。
ＥＬ素子の発光体には、般に硫化亜鉛（Ｚ ｎ Ｓ）系
のものに活性体（付活剤）として銅（Ｃｕ）などを添加
したものが用いられているが、用途拡大のためには大幅
な輝度増大が要求されている。
本発明の目的は、高輝度のＥＬ蛍光体を容易に製造でき
るＥＬ蛍光体の製造方法を提供することにある。As is well known, EL elements are used as thin surface light sources with low power consumption in backlight sources for liquid crystal display devices, light sources for instrument panel illumination, light sources for copying machines, decorative light sources, and the like. The light emitting material of EL devices is generally made of zinc sulfide (ZnS) with copper (Cu) added as an activator. requires a significant increase in brightness. An object of the present invention is to provide a method for manufacturing an EL phosphor that can easily manufacture a high-brightness EL phosphor.
本発明は、平均粒径が１〜５μｍの硫化亜鉛に付活剤と
して銅、共付活剤としてアルミニウム、塩素、臭素、ヨ
ウ素のいずれかを添加して焼成することを特徴とするも
のであり、高輝度のＥＬ蛍光体を容易に製造することが
できる。The present invention is characterized by adding copper as an activator and any one of aluminum, chlorine, bromine, and iodine as a co-activator to zinc sulfide having an average particle size of 1 to 5 μm, and firing the resultant. , a high-brightness EL phosphor can be easily produced.
平均粒径が１〜５μｍの硫化亜鉛（ＺｎＳ）に発光中心
を形成するため、付活剤と共付活剤を添加する。付活剤
としては、銅（Ｃｕ）、銀（Ａｇ）、マンガン（Ｍｎ）
などのいずれかを用いる。
また、共付活剤としては、アルミニウム（Ａ））、塩素
（Ｃ７）、臭素（Ｂ ｒ ） 、ヨウ素（１）などのい
ずれかを用いる。
そして、付活剤、共付活剤を添加した混合物を還元性雰
囲気（硫化水素あるいは二硫化炭素を含む雰囲気）中で
焼成し、シアンエツチングしてＥＬ蛍光体を得る。
以下、実施例を説明する。
実施例Ｉ
平均粒径が１．５μｍの硫化亜鉛（ＺｎＳ）粉末に付活
剤として銅（Ｃｕ）を硝酸銅（Ｃｕ（Ｎ０３ ）２ ”
３Ｈ２０）の形で０．３ｍｏＪ％、共付活剤として臭
素（Ｂｒ）を臭化アンモニウム（ＮＨ４Ｂ ｒ ）の形
で３．０ｍｏ７％添加し、湿式混合する。
次に、この混合物を乾燥し、硫化水素雰囲気中で９００
℃、２時間の焼成を行った。その後、１０％のシアン化
ナトリウム水溶液でＺｎＳに固溶しなかったＣｕをエツ
チングし、乾燥した後、ふるいにかけてＺｎＳ：Ｃｕ、
Ｂｒ蛍光体を得る。
上記蛍光体をシアノエチルセルロースに分散し、アルミ
ニウム電極上の発光層としてスクリーン印刷し、更にそ
の上に透明電極を形成して厚膜ＥＬ素子を作製した。そ
して、その発光層に４００Ｈｚの交流電界を電界強度が
１．５ Ｘ １０ Ｖ／ｃ−となるように印加し、輝度
をフォトメータ（テクトロニクス社製）で測定した。
実施例２〜６
焼成時間、ＺｎＳの平均粒径を変えた実施例１と同様の
方法でＺｎＳ：Ｃｕｅ Ｂｒ蛍光体を作製した。各蛍光
体を用い前述の素子作製方法で厚膜ＥＬ素子を作製し、
輝度測定を行った。
比較例１
平均粒径が０．５μｍのＺｎＳ粉末を用いて実施例１と
同様の方法でＺ ｎ Ｓ ： Ｃｕ ＋ Ｂ ｒ蛍光体
を作製した。この蛍光体を用い前述の素子作製方法で厚
膜ＥＬ素子を作製し、輝度測定を行った。
比較例２
平均粒径が７．０μｍのＺｎＳ粉末を用いて実施例１と
同様の方法でＺｎＳ：Ｃｕ、Ｂｒ蛍光体を作製した。こ
の蛍光体を用いて前述の素子作製方法で厚膜ＥＬ素子を
作成し、輝度測定を行った上記各実施例と各比較例のＺ
ｎＳ平均粒径、焼成時間及び輝度を下記の表に示す。お
な、平均粒径は電子顕微鏡写真より測定した。
この表から明らかなように、本発明の各実施例１〜６は
、比較例１，２より高い輝度、を有している。特に、実
施例６では輝度が比較例１の４．３倍となっており、高
輝度の厚膜ＥＬ素子が期待できる。
なお、前記実施例はＺ ｎ Ｓ ： Ｃｕ ＋ Ｂ ｒ
蛍光体の場合であるが、共付活剤としてＢｒの代わりに
Ａｌ、Ｃ７，Ｊを用いても同様の効果が得られたAn activator and a coactivator are added to form luminescent centers in zinc sulfide (ZnS) having an average particle size of 1 to 5 μm. As an activator, copper (Cu), silver (Ag), manganese (Mn)
Use one of the following. Further, as the co-activator, one of aluminum (A)), chlorine (C7), bromine (Br), iodine (1), etc. is used. Then, the mixture to which the activator and co-activator are added is fired in a reducing atmosphere (atmosphere containing hydrogen sulfide or carbon disulfide) and cyan-etched to obtain an EL phosphor. Examples will be described below. Example I Copper (Cu) was added as an activator to zinc sulfide (ZnS) powder with an average particle size of 1.5 μm and copper nitrate (Cu(N03)2''
0.3 moJ% in the form of 3H20) and 3.0 mo7% of bromine (Br) as a co-activator in the form of ammonium bromide (NH4Br) are added and wet mixed. This mixture was then dried at 900 °C in a hydrogen sulfide atmosphere.
C. for 2 hours. Thereafter, Cu that did not dissolve in ZnS was etched with a 10% aqueous sodium cyanide solution, dried, and sieved to separate ZnS:Cu,
Obtain a Br phosphor. The above phosphor was dispersed in cyanoethyl cellulose, screen printed as a light emitting layer on an aluminum electrode, and a transparent electrode was further formed thereon to produce a thick film EL device. Then, a 400 Hz alternating current electric field was applied to the light emitting layer so that the electric field strength was 1.5 x 10 V/c-, and the brightness was measured with a photometer (manufactured by Tektronix). Examples 2 to 6 ZnS:Cue Br phosphors were produced in the same manner as in Example 1 except that the firing time and the average particle size of ZnS were changed. A thick film EL device was fabricated using each phosphor using the device fabrication method described above,
The brightness was measured. Comparative Example 1 A ZnS:Cu+Br phosphor was produced in the same manner as in Example 1 using ZnS powder with an average particle size of 0.5 μm. A thick film EL device was fabricated using this phosphor using the device fabrication method described above, and the luminance was measured. Comparative Example 2 A ZnS:Cu,Br phosphor was produced in the same manner as in Example 1 using ZnS powder with an average particle size of 7.0 μm. Thick film EL devices were fabricated using this phosphor using the device fabrication method described above, and the luminance was measured.
The nS average particle size, firing time and brightness are shown in the table below. Note that the average particle size was measured from electron micrographs. As is clear from this table, each of Examples 1 to 6 of the present invention has higher luminance than Comparative Examples 1 and 2. In particular, in Example 6, the luminance was 4.3 times that of Comparative Example 1, and a high-luminance thick film EL element can be expected. In addition, in the above example, Z n S : Cu + Br
In the case of phosphors, similar effects were obtained when Al, C7, and J were used instead of Br as coactivators.
以上のように本発明によれば、平均粒径１〜５μｍのＺ
ｎＳを用い、付活剤としてＣｕ１共付活剤として、Ａｈ
ＣＩ、Ｂｒｚ Ｉのいずれかを添加して焼成すること
により、高輝度の蛍光体を容易に製造することができ、
高性能の厚膜ＥＬ素子を実現できる。As described above, according to the present invention, Z with an average particle size of 1 to 5 μm
Using nS as an activator and Cu1 coactivator, Ah
By adding either CI or Brz I and firing, a high-brightness phosphor can be easily produced,
A high-performance thick film EL element can be realized.
Claims (1)
共付活剤としてアルミニウム、塩素、臭素、ヨウ素のい
ずれかを添加して焼成することを特徴とするＥＬ蛍光体
の製造方法。Copper as an activator to zinc sulfide with an average particle size of 1 to 5 μm,
A method for producing an EL phosphor, which comprises adding one of aluminum, chlorine, bromine, and iodine as a co-activator and firing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2095875A JPH03295194A (en) | 1990-04-11 | 1990-04-11 | Manufacture of electroluminescence (el) phosphor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2095875A JPH03295194A (en) | 1990-04-11 | 1990-04-11 | Manufacture of electroluminescence (el) phosphor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03295194A true JPH03295194A (en) | 1991-12-26 |
Family
ID=14149518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2095875A Pending JPH03295194A (en) | 1990-04-11 | 1990-04-11 | Manufacture of electroluminescence (el) phosphor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03295194A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002074879A1 (en) * | 2001-03-15 | 2002-09-26 | Sony Corporation | Fluorescent powder, process for producing the same, display panel, and flat display |
-
1990
- 1990-04-11 JP JP2095875A patent/JPH03295194A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002074879A1 (en) * | 2001-03-15 | 2002-09-26 | Sony Corporation | Fluorescent powder, process for producing the same, display panel, and flat display |
| US6833086B2 (en) | 2001-03-15 | 2004-12-21 | Sony Corporation | Phosphor powder and production method therof, display panel, and flat-panel display device |
| CN100445346C (en) * | 2001-03-15 | 2008-12-24 | 索尼公司 | Fluorescent powder, process for producing the same, display panel and flat display |
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