JP4362591B2 - Phosphorescent phosphor - Google Patents
Phosphorescent phosphor Download PDFInfo
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- JP4362591B2 JP4362591B2 JP2005270684A JP2005270684A JP4362591B2 JP 4362591 B2 JP4362591 B2 JP 4362591B2 JP 2005270684 A JP2005270684 A JP 2005270684A JP 2005270684 A JP2005270684 A JP 2005270684A JP 4362591 B2 JP4362591 B2 JP 4362591B2
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Description
本発明は、蓄光性蛍光体に関する。 The present invention relates to a phosphorescent phosphor.
長残光蛍光体は、励起を停止した後も長時間にわたって発光を継続する性質を有する蛍光体であって、蓄光性蛍光体、燐光体などとも呼ばれている。 The long afterglow phosphor is a phosphor having a property of continuing to emit light for a long time after excitation is stopped, and is also called a phosphorescent phosphor, a phosphor, or the like.
実用レベルに達している代表的な長残光蛍光体としては、ＳｒＡｌ２Ｏ４：Ｅｕ，Ｄｙが知られている（例えば、特許文献１を参照）。この長残光蛍光体は、高輝度、長残光の優れた性質を示し、可視光の領域に吸収スペクトルをもつという大きな特徴を有している。
しかし、ＳｒＡｌ２Ｏ４：Ｅｕ，Ｄｙは、その発光色が緑色に限られるという欠点があった。 However, SrAl 2 O 4 : Eu, Dy has a drawback that its emission color is limited to green.
また、ＳｒＡｌ２Ｏ４：Ｅｕ，Ｄｙのほかに実用レベルに達している長残光蛍光体はわずか数例しか知られていない。これは、照射されたエネルギーを蓄積した後、長時間をかけて徐々に光としてエネルギーを放出させるような材料設計が困難であったからである。 In addition to SrAl 2 O 4 : Eu, Dy, only a few examples of long afterglow phosphors that have reached a practical level are known. This is because it is difficult to design a material that accumulates the irradiated energy and then gradually releases the energy as light over a long period of time.
そこで、本発明は上記問題点に鑑み、白色や多色の残光特性を示す新規の長残光蛍光体を提供することをその目的とする。 In view of the above problems, an object of the present invention is to provide a novel long afterglow phosphor that exhibits white or multicolor afterglow characteristics.
上記課題を達成するため種々検討した結果、Ｍｇ２ＳｎＯ４が白色の残光特性を示すことを見出し、本発明を完成させた。 As a result of various studies to achieve the above-mentioned problems, it was found that Mg 2 SnO 4 exhibits white afterglow characteristics , and the present invention has been completed.
すなわち、本発明の蓄光性蛍光体は、Ｍｇ２ＳｎＯ４ のみからなることを特徴とする。 That is, the phosphorescent phosphor of the present invention is characterized by consisting only of Mg 2 SnO 4 .
本発明によれば、白色の残光特性を示す新規の蓄光性蛍光体を提供することができる。 According to the present invention, it is possible to provide a novel phosphorescent phosphor which shows afterglow characteristics of white color.
本発明の蓄光性蛍光体は、Ｍｇ２ＳｎＯ４からなる。なお、Ｍｇ２ＳｎＯ４が残光特性を示すことは従来知られていなかった。 The phosphorescent phosphor of the present invention is made of Mg 2 SnO 4 . In addition, it was not conventionally known that Mg 2 SnO 4 exhibits afterglow characteristics.
Ｍｇ２ＳｎＯ４からなる本発明の蓄光性蛍光体は、波長２００〜３００ｎｍの紫外線の励起によって、４００〜６００ｎｍにブロードなピークを有する白色の発光スペクトルを示し、残光は数十秒間継続する。 The phosphorescent phosphor of the present invention made of Mg 2 SnO 4 exhibits a white emission spectrum having a broad peak at 400 to 600 nm by excitation of ultraviolet light having a wavelength of 200 to 300 nm, and the afterglow lasts for several tens of seconds .
このように、本発明の蓄光性蛍光体は、紫外光を吸収、蓄積して高強度で長時間の発光を持続し、蓄光性蛍光体として優れた特性を持つ。 As described above, the phosphorescent phosphor of the present invention absorbs and accumulates ultraviolet light to sustain light emission with high intensity for a long time, and has excellent characteristics as a phosphorescent phosphor .
したがって、本発明の蓄光性蛍光体によれば、白色の残光特性を示す新規の蓄光性蛍光体を提供することができる。本発明の蓄光性蛍光体は、紫外光のほか、電子ビーム、電気エネルギーによっても励起可能であり、蛍光灯やＥＬ（電気発光）素子などの発光体として利用可能である。停電時においても発光が継続するので、非常時の照明手段としての利用が期待される。 Therefore, according to the phosphorescent phosphor of the present invention, it is possible to provide a novel phosphorescent phosphor which shows afterglow characteristics of white color. The phosphorescent phosphor of the present invention can be excited not only by ultraviolet light but also by an electron beam or electric energy, and can be used as a light emitter such as a fluorescent lamp or an EL (electroluminescent) element. Since light emission continues even during a power outage, it is expected to be used as an emergency lighting means.
なお、本発明は上記実施形態に限定されるものではなく、本発明の思想を逸脱しない範囲で種々の変形実施が可能である。 The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
Ｍｇ２ＳｎＯ４は通常の固相法によって合成した。出発原料としてＭｇＯ、ＳｎＯ２を所定量秤量し、少量のエタノールを加えメノウ乳鉢で湿式混合した。赤外ランプを用いて試料を乾燥後、アルミナるつぼに入れて空気中で１２００℃、６時間焼成した。粉末Ｘ線回折測定の結果から上記の合成条件で目的物が得られたことを確認した。 Mg 2 SnO 4 was synthesized by an ordinary solid phase method. Predetermined amounts of MgO and SnO 2 were weighed as starting materials, a small amount of ethanol was added, and wet mixed in an agate mortar. The sample was dried using an infrared lamp and then placed in an alumina crucible and baked in air at 1200 ° C. for 6 hours. From the result of the powder X-ray diffraction measurement, it was confirmed that the target product was obtained under the above synthesis conditions.
なお、出発原料としては、上記酸化物以外にシュウ酸塩、酢酸塩、硝酸塩、水酸化物などが使用可能である。 As starting materials, oxalates, acetates, nitrates, hydroxides and the like can be used in addition to the above oxides.
図１に合成したＭｇ２ＳｎＯ４の励起発光スペクトルを示す。２００〜３００ｎｍの紫外光域に励起スペクトルが存在し、４００〜６００ｎｍにブロードなピークを有する白色の発光がみられた。 FIG. 1 shows the excitation emission spectrum of the synthesized Mg 2 SnO 4 . An excitation spectrum was present in the ultraviolet region of 200 to 300 nm, and white light emission having a broad peak at 400 to 600 nm was observed.
また、図２に合成したＭｇ２ＳｎＯ４の発光強度の減衰曲線を示す。残光が数十秒間継続することが確認された。 FIG. 2 shows an attenuation curve of the emission intensity of the synthesized Mg 2 SnO 4 . It was confirmed that afterglow lasted for several tens of seconds.
このように、本発明の新規のＭｇ２ＳｎＯ４からなる蓄光性蛍光体は、優れた白色の残光特性を示すことが確認された。 Thus, it was confirmed that the phosphorescent phosphor made of the novel Mg 2 SnO 4 of the present invention exhibits excellent white afterglow characteristics.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2005270684A JP4362591B2 (en) | 2005-09-16 | 2005-09-16 | Phosphorescent phosphor |
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| JP2005270684A JP4362591B2 (en) | 2005-09-16 | 2005-09-16 | Phosphorescent phosphor |
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| JP2007077365A JP2007077365A (en) | 2007-03-29 |
| JP4362591B2 true JP4362591B2 (en) | 2009-11-11 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007146102A (en) * | 2005-11-07 | 2007-06-14 | Kyushu Institute Of Technology | Inorganic oxide fluorescent material |
| WO2009081677A1 (en) * | 2007-12-25 | 2009-07-02 | Idemitsu Kosan Co., Ltd. | Tin oxide-magnesium oxide sputtering target and transparent semiconductor film |
| WO2013166661A1 (en) * | 2012-05-08 | 2013-11-14 | 海洋王照明科技股份有限公司 | Manganese-doped magnesium stannate luminescent material and preparation method therefor |
| JP6032403B2 (en) * | 2012-08-31 | 2016-11-30 | 国立研究開発法人産業技術総合研究所 | Method for producing photochromic material and method for reversibly changing absorption spectrum of photochromic material |
| JP6249476B2 (en) * | 2013-10-31 | 2017-12-20 | 国立研究開発法人産業技術総合研究所 | Near-infrared phosphorescent fluorescent material, near-infrared phosphorescent phosphor, and manufacturing method of near-infrared phosphorescent fluorescent material |
| CN103897696B (en) * | 2014-03-31 | 2016-05-04 | 华南理工大学 | Nm near-infrared long-afterglow material of a kind of Cr doping and preparation method thereof |
| CN103980895B (en) * | 2014-03-31 | 2015-10-28 | 华南理工大学 | Zinc near infrared long after glow luminous material of a kind of trivalent chromic ion doping and preparation method thereof |
| CN107527593B (en) * | 2017-08-21 | 2023-09-08 | 易美芯光（北京）科技有限公司 | High-light-efficiency TFT-LCD backlight display driving method |
| CN110079314B (en) * | 2019-06-06 | 2020-08-25 | 中国科学院长春应用化学研究所 | Stannate near-infrared long-afterglow luminescent material and preparation method thereof |
| CN110746967B (en) * | 2019-11-08 | 2022-09-30 | 广东省稀有金属研究所 | Near-infrared long-afterglow nano luminescent material and preparation method and application thereof |
| CN114958366A (en) * | 2022-06-02 | 2022-08-30 | 华南理工大学 | Broadband near-infrared luminescent material and preparation method and application thereof |
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