JPS6323987A - Electroluminescent phosphor - Google Patents
Electroluminescent phosphorInfo
- Publication number
- JPS6323987A JPS6323987A JP61166635A JP16663586A JPS6323987A JP S6323987 A JPS6323987 A JP S6323987A JP 61166635 A JP61166635 A JP 61166635A JP 16663586 A JP16663586 A JP 16663586A JP S6323987 A JPS6323987 A JP S6323987A
- Authority
- JP
- Japan
- Prior art keywords
- phosphor
- particles
- hydrophobic
- fine particles
- silica fine
- 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
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 47
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 42
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 20
- 239000010419 fine particle Substances 0.000 claims abstract description 18
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 17
- 239000002245 particle Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims abstract description 5
- 239000011347 resin Substances 0.000 claims abstract description 5
- FFUAGWLWBBFQJT-UHFFFAOYSA-N hexamethyldisilazane Chemical compound C[Si](C)(C)N[Si](C)(C)C FFUAGWLWBBFQJT-UHFFFAOYSA-N 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 125000001165 hydrophobic group Chemical group 0.000 abstract description 3
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 abstract description 3
- 125000005372 silanol group Chemical group 0.000 abstract description 3
- 238000005401 electroluminescence Methods 0.000 description 21
- 229910052984 zinc sulfide Inorganic materials 0.000 description 5
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 239000000020 Nitrocellulose Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001220 nitrocellulos Polymers 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 239000012190 activator Substances 0.000 description 2
- LIKFHECYJZWXFJ-UHFFFAOYSA-N dimethyldichlorosilane Chemical group C[Si](C)(Cl)Cl LIKFHECYJZWXFJ-UHFFFAOYSA-N 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- NYZGMENMNUBUFC-UHFFFAOYSA-N P.[S-2].[Zn+2] Chemical compound P.[S-2].[Zn+2] NYZGMENMNUBUFC-UHFFFAOYSA-N 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000005083 Zinc sulfide Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical group [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- NMEPHPOFYLLFTK-UHFFFAOYSA-N trimethoxy(octyl)silane Chemical compound CCCCCCCC[Si](OC)(OC)OC NMEPHPOFYLLFTK-UHFFFAOYSA-N 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Luminescent Compositions (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（ｐλ業上の利用分野１
本発明は分散型のｔＩ！場発光発光レクトロ・ルミネセ
ンス、又はＥＬ）素子に関し、特にそのＥＬ蛍光体に関
する。DETAILED DESCRIPTION OF THE INVENTION [OBJECTS OF THE INVENTION] (Pλ Field of Application 1) The present invention relates to a distributed tI! Field Emission Electroluminescence (EL) device, and in particular to an EL phosphor thereof.
（従来の技術）
従来、この種のＥＬ蛍光体は、硫化亜鉛（７，ｎ Ｓ
）を母体として、これに付活剤として、銅又はマンガン
を導入したものが一般的に用いられている。(Prior Art) Conventionally, this type of EL phosphor is made of zinc sulfide (7,n S
) as a matrix and copper or manganese introduced therein as an activator is generally used.
このＥＬ蛍光体は、寿命が短いという欠点を持つている
。特に、湿気を含んだ状態でＥＬ素子を動作すると、上
記硫化亜鉛蛍光体の分解が短時間で進行し発光輝度の劣
化が速くなることがよく知られている。この為、この寿
命特性改良をｒ１的として、蛍光体自身の改良、ＥＬ素
子の改良等の種々の工夫がなされてきている０例えば、
蛍光体自身の改良としては、 ＺｎＳの亜鉛の一部をイ
オン半径の大きいカドミウムに置換し、共付活剤に通常
用いられる塩素、アルミニウムの代ね１１に臭素を用Ｎ
、
いた蛍光体は劣化が小さくなるとの報告や提案がなされ
ている。ＥＬｉ子の改良には、例えば、ＥＬ素子の外側
を３フツ化塩化エチレン等からなる防湿保護フィルムで
覆っであることが件通に行われている。This EL phosphor has the disadvantage of a short lifetime. In particular, it is well known that when an EL device is operated in a humid state, the zinc sulfide phosphor decomposes in a short period of time and the luminance deteriorates quickly. For this reason, various efforts have been made to improve this lifetime characteristic, such as improving the phosphor itself and improving the EL element.
To improve the phosphor itself, part of the zinc in ZnS was replaced with cadmium, which has a large ionic radius, and bromine was used in place of the chlorine and aluminum normally used as co-activators.
There have been reports and proposals that the degradation of phosphors that have been used is reduced. To improve ELi devices, for example, it is common practice to cover the outside of the EL device with a moisture-proof protective film made of trifluorochloroethylene or the like.
（発明が解決しようとする問題点）
しかしながら、これら種々の工夫にもかかられず、まだ
寿命特性は、他の液晶等の他の表示素子と比較して、ま
だかなり劣るものである０本発明は上記状況にかんがみ
、高いＥＬ発光輝度を持ち、発光輝度の寿命特性の良好
なＥＬ蛍光体を提供することを目的とする牛ノのである
。(Problems to be Solved by the Invention) However, despite these various efforts, the life characteristics are still quite inferior compared to other display elements such as other liquid crystals. In view of the above situation, Ushino's purpose is to provide an EL phosphor that has high EL luminance and has good lifetime characteristics of luminance.
（問題点を解決するための手段）
本発明者等は上記目的を達成するために、従来から行わ
れてきた蛍光体自身の改良、ＥＬ索子の改良の他に、Ｅ
Ｌ蛍光体粒子表面に種々の物質の被覆処理実験を行って
きた。その結果、ＥＬ蛍光体粒子表面に、疎水性シリカ
微粒子を被覆することによって、高輝度で寿命特性の優
れたＥＬ蛍光体が得られることを見出し、本発明に至っ
た。(Means for Solving the Problems) In order to achieve the above object, the present inventors have made improvements to the phosphor itself and the EL string, which have been conventionally carried out.
Experiments have been conducted to coat the surfaces of L phosphor particles with various substances. As a result, it was discovered that by coating the surface of EL phosphor particles with hydrophobic silica fine particles, an EL phosphor with high brightness and excellent lifetime characteristics could be obtained, leading to the present invention.
すなわち１本発明のＥＬ蛍光体は、蛍光体粒子表面に、
疎水性シリカ微粒子を０．３乃至１０重量％被覆したこ
とを特徴とする。より好ましい範囲は０．５〜５重量％
である。That is, the EL phosphor of the present invention has the following properties on the surface of the phosphor particles:
It is characterized by being coated with 0.3 to 10% by weight of hydrophobic silica fine particles. A more preferable range is 0.5 to 5% by weight.
It is.
本発明においては、蛍光体粒子表面に疎水性シリカ微粒
子とともに疎水性有機樹脂を０．５乃至５電歇％の範囲
内で被覆することも特徴である。そめ結果′寿命特性は
より向上する。The present invention is also characterized in that the surface of the phosphor particles is coated with a hydrophobic organic resin in a range of 0.5 to 5% in addition to hydrophobic silica fine particles. As a result, the life characteristics are further improved.
５’を量％を超えると蛍光体の分散性が悪くなるので好
ましくない。If the amount of 5' exceeds a certain amount, the dispersibility of the phosphor deteriorates, which is not preferable.
本発明において被覆した疎水性シリカ微粒子は、比表面
積が３０〜３００ｒｒｆ／ＩＦの範囲にあり、疎水化度
がＭＷｆｍ （メタノールウェツタビリテイ−法で、す
なわち粒子が完全にぬれるメタノールの容量％の値）で
２０乃至７０の範囲にあるのが好ましい。より好ましい
範囲は比表面積が５０乃至１５０ｒｒｆ／＃、疎水化度
がＭＷ値で５０乃至７０である０本発明の蛍光体に用い
る疎水性シリカ微粒子は通常のシリカ微粒子の表面の親
水性のシラノール基をジメチルジクロルシラン、ヘキサ
メチルジシラザン、オクチ、ルトリメトキシシラン、シ
リコーンオイル、ブチルアルコール等で疎水基に置換し
たシリカ微粒子を用いることができる。The hydrophobic silica fine particles coated in the present invention have a specific surface area in the range of 30 to 300 rrf/IF, and a hydrophobic degree of MWfm (by the methanol wettability method, that is, the volume % of methanol that completely wets the particles). (value) is preferably in the range of 20 to 70. A more preferable range is that the specific surface area is 50 to 150rrf/# and the degree of hydrophobicity is 50 to 70 in terms of MW value.The hydrophobic silica fine particles used in the phosphor of the present invention have hydrophilic silanol groups on the surface of ordinary silica fine particles. Silica fine particles in which a hydrophobic group is substituted with dimethyldichlorosilane, hexamethyldisilazane, octyl, lutrimethoxysilane, silicone oil, butyl alcohol, etc. can be used.
（作用）
第１図は、本発明のＥＬ蛍光体すなわちヘキサメチルジ
シラザン処理した疎水化度６０の疎水性シリカ微粒子を
１型破％被覆したＺｎＳ：Ｃｕ、 ＣＩ蛍光体のＥＬ発
光輝度の寿命特性を示したものである。(Function) Figure 1 shows the lifetime of the EL luminance of the EL phosphor of the present invention, that is, the ZnS:Cu, CI phosphor coated with type 1 breakage% hydrophobic silica fine particles treated with hexamethyldisilazane and having a degree of hydrophobicity of 60. It shows the characteristics.
ＥＬ素子は蛍光体とひまし浦を８０ ： ２０の重量比
でよく練りあわせたものを、マイカ、テフロン等の薄膜
の絶縁性のスペーサーを介して、電極間にＥＬ蛍光体層
を形成する。一方の電極は透明電極とする。第１図のＲ
１軸は、５に１に、 ２００ Ｖの交流電圧を印加した
ときの相対発光輝度、横軸には、動作時間を表す。曲ｍ
Ａは本発明の蛍光体のものであり、曲線Ｂは比較の為、
疎水性シリカ微粒子を被覆してない従来の蛍光体のもの
であるにの図から明らかなように、本発明の蛍光体は従
来の蛍光体に比較して、初期輝度は従来の約９５％とや
や低いが、寿命（発光輝度が１／２になる時間）は、従
来の蛍光体の約１．６倍の８００時間に大幅に伸びてい
る。The EL element is made by mixing phosphor and Himashiura in a weight ratio of 80:20, and forming an EL phosphor layer between electrodes with an insulating spacer made of a thin film such as mica or Teflon interposed therebetween. One electrode is a transparent electrode. R in Figure 1
The first axis represents the relative luminance when an AC voltage of 200 V is applied, and the horizontal axis represents the operating time. song m
Curve A is for the phosphor of the present invention, and curve B is for comparison.
As is clear from the figure below, which shows a conventional phosphor not coated with hydrophobic silica particles, the phosphor of the present invention has an initial brightness of about 95% of that of the conventional phosphor. Although it is a little low, the lifespan (the time for the luminance to decrease to 1/2) has been significantly extended to 800 hours, which is about 1.6 times that of conventional phosphors.
本発明の蛍光体に用いる疎水性シリカ微粒子の被ｙＩｊ
＆は、０．３重量％以下では、寿命に対して効果が少な
く、又１０重量％を越えると、初期輝度の低下が大きく
なり、好ましくない、又１本発明の蛍光体に用いる疎水
性シリカ微粒子の比表面積は３０乃至３００ｎｒ／ｌの
範囲にあるものが、効果がある。Coverage of hydrophobic silica fine particles used in the phosphor of the present invention
If & is less than 0.3% by weight, it will have little effect on the lifespan, and if it exceeds 10% by weight, the initial brightness will decrease significantly, which is undesirable. Fine particles having a specific surface area in the range of 30 to 300 nr/l are effective.
比表面積は、大きければ、大きい程好ましい、３０イ／
り以下では、寿命に効果あるようにする為には、被覆量
をかなり多くしなければならず、これにより、輝度低下
が著しくなり、実用的でない。The larger the specific surface area, the better, 30 i/
Below this, the amount of coating must be considerably increased in order to have an effect on longevity, which results in a significant reduction in brightness and is not practical.
更に好ましい範囲は比表面積が５０ｒｒｒ／！）以上で
ある。上限は実用的かつ製造できるものとしては」−記
の３００ｒｒｒ／ｌとしてよい。又１本発明の蛍光体に
用いる疎水性シリカ微粒子の疎水化度すなわちＭＷ値（
メタノールウェツタビリテイ−法で、すなわち粒子が完
全にぬれるメタノールの容量％の値）も大きければ、大
きい程好ましい、ＭＷ値が２０以下では、寿命に対して
効果がみられず、更に好ましい範囲はＭＷ値が５０以上
である。上限は実用的かつ製造できるものとしては上記
の８０としてよい。A more preferable range is a specific surface area of 50rrr/! ) That's it. The upper limit may be set to 300 rrr/l, as long as it is practical and manufacturable. Furthermore, the degree of hydrophobicity, that is, the MW value (
The larger the methanol wettability method (that is, the volume % value of methanol that completely wets the particles), the better.If the MW value is 20 or less, no effect on the life is observed, and a more preferable range is has a MW value of 50 or more. The upper limit may be set to 80 as mentioned above as long as it is practical and can be manufactured.
本発明の蛍光体に用いる疎水性シリカ微粒子は通常のシ
リカ微粒子表面の親水性のシラノール基をジメチルジク
ロルシラン、ヘキサジメチルジシラザン、オクチルトリ
メトキシシラン、シリコーンオイル、ブチルアルコール
等で疎水基に置換したシリカ微粒子を用いることができ
る。この疎水性シリカ微粒子を適当量、メタノール、エ
タノール、酢酸ブチル等の有機溶媒に懸濁して必要な場
合には、ボールミル等の手段で分散する。これとは別に
、適当量の蛍光体の上記有機溶媒の懸濁液を作る。この
両者を混合、かくはんして乾燥、ふるい工程を通して得
られる。上記有機溶媒中に適当量のポリビニルブチラー
ル（ＰＶＢ）ニトロセルロース（ＮＣ）等の非水溶性の
有機樹脂を溶解したものを用いると更に特性が向上する
。以下ＥＬ蛍光体には１粒径約３０μのＺｎＳ ： Ｃ
ｕ、ＣＩ緑色発光蛍光体の場合の本発明の蛍光体の実施
例について説明する。In the hydrophobic silica particles used in the phosphor of the present invention, the hydrophilic silanol groups on the surface of ordinary silica particles are replaced with hydrophobic groups using dimethyldichlorosilane, hexadimethyldisilazane, octyltrimethoxysilane, silicone oil, butyl alcohol, etc. fine silica particles can be used. An appropriate amount of the hydrophobic silica fine particles are suspended in an organic solvent such as methanol, ethanol, butyl acetate, and if necessary, dispersed by means such as a ball mill. Separately, a suspension of an appropriate amount of the phosphor in the above organic solvent is prepared. It is obtained through mixing, stirring, drying, and sieving processes. The properties can be further improved by using an appropriate amount of a water-insoluble organic resin such as polyvinyl butyral (PVB) or nitrocellulose (NC) dissolved in the above organic solvent. Below, the EL phosphor contains ZnS with a particle size of about 30 μm: C
An example of the phosphor of the present invention in the case of u, CI green-emitting phosphor will be described.
実施例１−１５
上記ＺｎＳ蛍光体に対して上記の製造方法にて疎水性シ
リカ微粒子を上記有機樹脂と共に、下記第１表に示すよ
うな本発明の蛍光体を試作した。このようにして得られ
た蛍光体とひまし油を８：２の重量比で透明電極上に発
光層を形成してＥＬ素子を作製して、これらの輝度、寿
命を測定した。Example 1-15 Using the above manufacturing method for the above ZnS phosphor, hydrophobic silica fine particles were added together with the above organic resin to produce a phosphor of the present invention as shown in Table 1 below. An EL device was prepared by forming a light-emitting layer on a transparent electrode using the phosphor thus obtained and castor oil at a weight ratio of 8:2, and the brightness and lifetime of the device were measured.
このＥＬ索子の特性は、 ５ＫＨｚ、２００Ｖの交Ａｆ
ｆｉ圧を印加したときの発光輝度を従来の蛍光体の輝度
を１００％としときの相対輝度で表し、寿命は初期輝度
の半減時間で定義した。得られた結果を下記第１表に示
す。The characteristics of this EL cord are as follows: 5KHz, 200V alternating current Af
The emission brightness when the fi pressure was applied was expressed as the relative brightness when the brightness of the conventional phosphor was taken as 100%, and the lifetime was defined as the half-life time of the initial brightness. The results obtained are shown in Table 1 below.
（以下余白）
第１表
Ａ弔 ポリビニルアルコール 闇 ニトロセルロ
ース拳：親水性シリカ粒子を用いた場合
第１表から明らかなように、いずれの場合も、寿命は比
較例の５００時間を越え、輝度も比較例とほぼ同等であ
り、優れた発光特性を示すものである。(Leaving space below) Table 1 A Condolence Polyvinyl Alcohol Dark Nitrocellulose fist: When using hydrophilic silica particles As is clear from Table 1, in all cases, the lifespan exceeds the 500 hours of the comparative example, and the brightness also decreases. It is almost the same as the comparative example, and exhibits excellent light emitting characteristics.
尚、比較例１はシリカ微粒子を被覆しなかったもの、比
較例２は親水性シリカ微粒子を被覆したものである。Note that Comparative Example 1 was not coated with silica fine particles, and Comparative Example 2 was coated with hydrophilic silica fine particles.
第１図は１本発明の蛍光体の発光の寿命特性を示したも
のであり１図中曲線Ａは本発明の蛍光体のものであり、
Ｂは従来の蛍光体のものである。
代理人 弁理士 則 近 憲 佑
同 大胡典夫Figure 1 shows the lifetime characteristics of light emission of the phosphor of the present invention, and curve A in Figure 1 is that of the phosphor of the present invention.
B is a conventional phosphor. Agent Patent Attorney Nori Chika Yudo Norio Ogo
Claims (3)
至１０重量％被覆したことを特徴とする電場発光蛍光体
。(1) An electroluminescent phosphor characterized in that the surface of the phosphor particles is coated with 0.3 to 10% by weight of hydrophobic silica fine particles.
水性有機樹脂を０．５乃至５重量％被覆したことを特徴
とする特許請求の範囲第１項記載の電場発光蛍光体。(2) The electroluminescent phosphor according to claim 1, wherein the surface of the phosphor particle is coated with 0.5 to 5% by weight of a hydrophobic organic resin together with hydrophobic silica fine particles.
が３０乃至３００ｍ＾２／ｇの範囲にあり、疎水化度が
ＭＷ値（メタノールウェッタビリティー法で、すなわち
粒子が完全にぬれるメタノールの容量％の値）で２０乃
至７０の範囲にあることを特徴とする特許請求の範囲第
１項記載の電場発光蛍光体。(3) The hydrophobic silica fine particles on the surface of the phosphor particles have a specific surface area in the range of 30 to 300 m^2/g, and the degree of hydrophobicity is the MW value (by the methanol wettability method, that is, the methanol wettability method where the particles are completely wetted). 2. The electroluminescent phosphor according to claim 1, wherein the electroluminescent phosphor has a value (capacity %) ranging from 20 to 70.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61166635A JPS6323987A (en) | 1986-07-17 | 1986-07-17 | Electroluminescent phosphor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61166635A JPS6323987A (en) | 1986-07-17 | 1986-07-17 | Electroluminescent phosphor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6323987A true JPS6323987A (en) | 1988-02-01 |
Family
ID=15834934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61166635A Pending JPS6323987A (en) | 1986-07-17 | 1986-07-17 | Electroluminescent phosphor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6323987A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02113085A (en) * | 1988-10-21 | 1990-04-25 | Nichia Chem Ind Ltd | Fluorescent substance for el panel |
| WO1990014744A1 (en) * | 1989-05-18 | 1990-11-29 | Eastman Kodak Company | Electroluminescent device with silazane-containing luminescent zone |
| US5342597A (en) * | 1990-11-14 | 1994-08-30 | Cabot Corporation | Process for uniformly moisturizing fumed silica |
| JP2002249769A (en) * | 1996-09-20 | 2002-09-06 | Siemens Ag | Wavelength conversion casting material, method of producing the same, and light emission element |
-
1986
- 1986-07-17 JP JP61166635A patent/JPS6323987A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02113085A (en) * | 1988-10-21 | 1990-04-25 | Nichia Chem Ind Ltd | Fluorescent substance for el panel |
| WO1990014744A1 (en) * | 1989-05-18 | 1990-11-29 | Eastman Kodak Company | Electroluminescent device with silazane-containing luminescent zone |
| US5342597A (en) * | 1990-11-14 | 1994-08-30 | Cabot Corporation | Process for uniformly moisturizing fumed silica |
| JP2002249769A (en) * | 1996-09-20 | 2002-09-06 | Siemens Ag | Wavelength conversion casting material, method of producing the same, and light emission element |
| JP2008103756A (en) * | 1996-09-20 | 2008-05-01 | Siemens Ag | Casting composition and method for producing same, and luminescence device |
| JP2009071336A (en) * | 1996-09-20 | 2009-04-02 | Siemens Ag | Led chip |
| JP2012238909A (en) * | 1996-09-20 | 2012-12-06 | Osram Ag | Casting material, method of manufacturing the same, and light emitting element |
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