TW452593B - Novel orange light-emission material and the preparation - Google Patents

Abstract

This invention describes a novel orange light-emission material and the preparation. The orange light-emission material has the chemical composition of (Ca(1-x)Pr(x))In2O4 (0.005 ≤ x ≤ 0.05) capable of phosphorescent emission and emits orange light under exciting light source such as ultraviolet light at wavelength of 220-350 nm. The orange light-emission material emits red light and the strength of the red light gradually decays after the exciting light source is switched off. Moreover, the energy bandgap of the orange light-emission material is between 3-4 eV and the orange light-emission material possess the characteristics of up-conversion.

Description

d5259 3 V. Description of the invention (1) [Background of luminescent material] The so-called luminescence is simply a phenomenon in which a substance emits light after absorbing energy. A substance that emits light after absorbing energy is called a luminescent material. When we excite the luminescent material with a suitable excitation source, such as ultraviolet light or electron beam, the luminescent material can emit light and be used by us. For example, the lamps used in daily life and the video tubes of televisions contain such light-emitting materials. Generally, an inorganic light-emitting material is composed of two parts: Host compound (Host): The host compound generally does not absorb excitation light and does not emit much light by itself. Activator (A c t i v a t 〇 r) ·· A substance that activates the host compound to emit light

A B 259 3 V. Description of the invention (2) ο Not all compounds can be used as host compounds of luminescent materials; the same activator may not be able to activate all host compounds. The host compound and the activator must be properly combined to obtain the light color and light intensity we require. It is not easy to find a host compound and an activator that can be properly matched. In particular, there are fewer light-emitting materials that emit orange light than red, blue, and green light-emitting materials. It is more difficult to find a suitable orange-based host compound and activator. [Objective of the Invention] Compared with red, blue, and green light-emitting materials, orange light-emitting materials

ill Page 6 452593 V. Description of the invention ¢ 3) The materials are relatively scarce and have considerable academic research and commercial value. The object of the present invention is to find a novel host compound with high luminous efficiency and a suitable activator; so that the host compound can emit orange light under the activation of the activator. [Contents of the Invention] The present invention is a novel indium salt orange light-emitting material represented by the chemical formula (C a ^ P rx) ln204 (0.005 SxS 〇. Ο 5); in which praseodymium (Pr) is an activator, which activates indium Calcium acid Ca I η2 04 host compound. The orange light-emitting material has phosphorescent radioactive material, and emits orange light under an excitation light source such as ultraviolet light at a wavelength of 220 to 350 nm. When the excitation light source is turned off, the orange light-emitting material emits red light, and Its light intensity gradually decays. Besides; the tangerine

45259 3 V. Description of the invention ¢ 4) The energy gap of the light-emitting material is between 3 ~ 4eV, and it has an up-conversion characteristic. The host compound of calcium indium acid C a I n204 is a novel high luminescence Efficient host compound; orange light-emitting material represented by (〇3 卜 / 1 \) 111204 (0.005 $ χ $ 0 · 05), also a new light-emitting orange light-emitting material. [Detailed description of the present invention] The present invention is described in detail as follows: I. The manufacturing method is a novel indium salt orange light-emitting material represented by the chemical formula (CabXPrx) In204 (0_005 SxS0.05); it is manufactured by the following records Method to make:

Page 8 452593 V. Description of the invention (5) [Raw materials] Fluorescent materials refer to the use of: (1) mother compounds such as calcium carbonate; or nitrate compounds such as nitrates which are easily oxidized to calcium oxide at high temperatures. (2) Indium compounds such as indium oxide: or indium-containing compounds that are easily oxidized to indium oxide at high temperatures. (3) osmium compounds such as pr2O3 and the like. 〔step〕

452593 V. Description of the invention (6) (1) The above three kinds of phosphor raw materials are weighed according to the metering ratio, and the weighed raw materials are ground in a mortar to make them uniformly mixed. (2) Put the mixed raw materials into a high-purity alumina crucible, and pre-fire in air at 600 ° C for 6 hours. (3) Sinter the pre-calcined raw materials in the air at 1000 to 140 ° C for 1 to 24 hours. Π. Results According to the above manufacturing steps, the orange light-emitting material of the present invention can be obtained. The orange light-emitting material has a phosphorescent radioactive substance, and emits orange light under an excitation light source such as ultraviolet light, and is excited at a wavelength of 220 to 350 ntn; when the excitation light source is turned off, the orange light-emitting material emits red light, and Its light intensity gradually decays.

Page 10 452593_ V. Description of the invention (7) In addition, the orange light-emitting material has an energy gap between 3 to 4 e V and has an up-conversion characteristic. Figure 1 shows the orange light-emitting material. Photoluminescence spectrum (Photoluminescence). The orange light-emitting material has a disc optical radioactive material, which emits orange light after being excited by an excitation light source; and exhibits an up-conversion (u p-c ο n v e r s i ο η) characteristic under excitation at a wavelength of 75 0 nm. I. Example The following is an example to illustrate the present invention: Take an orange light-emitting material (Ca〇, 99Pr〇 μ) I n204 as an example: Weighing

4 5 2 5 9 3 V. Invention description C8)

In2〇3 12.49 3 7 g

CaO 2.4983 g

Pr2 03 0. 0 7 4 2 g After the above raw materials are uniformly mixed in a mortar; put into an alumina crucible. Pre-burn in air at 600 ° C for 6 hours. It was sintered at 120 ° C for 24 hours. Grind after firing. The prepared orange light-emitting material has a phosphorescent radioactive material, and emits orange light under an excitation light source such as ultraviolet light and excites at a wavelength of 220 to 350 nm. When the excitation light source is turned off, the orange light-emitting material emits red light , And its light intensity gradually decays. In addition: the orange light-emitting material has an energy gap between 3 to 4 e V and has

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Claims (1)

— · 45 259 3 ι £ · 丄 Announcement _ 16 Application for Patent Fan Chong · 1. A novel orange light-emitting material represented by the chemical formula (Cai-xPr ^ Ir ^ h (0.005 SxS0.05), in which Ca I n204 is a high-efficiency host compound, and P r is an activator. The orange light-emitting material has a phosphorescent radioactive substance. It is radiated under the excitation light source such as ultraviolet light and excited at a wavelength of 220-350 nm. Orange light; when the excitation light source is turned off, the orange light-emitting material emits red light, and its light intensity gradually decays; in addition, the orange light-emitting material has an energy gap between 3 ~ 4eV and has an up-conversion ) Characteristics 2. — A method for manufacturing an orange light-emitting material as described in item 1 of the scope of patent application, the manufacturing steps are as follows: (1) Measure and mix the raw materials uniformly according to the measurement, Page 14 45 259 3 VI. The scope of patent application (2) The raw materials will be mixed evenly and pre-burned in air at 600 ° C for 6 hours. (3) The pre-burned raw materials will be burned in air at 100 0 ~ 1 4 0 0 ° C sintering 1 2 ~ 2 4 hours. 01 之。 3. The orange light-emitting material as described in item 1 of the patent application scope, wherein X is 0.01. 4. A method for manufacturing an orange light-emitting material as described in item 3 of the scope of patent application, the manufacturing steps are: (1) weighing the raw materials according to the measurement ratio and mixing them uniformly; (2) mixing the raw materials of the uniform sentence in air Pre-firing at 600 ° C for 6 hours, (3) Sintering the pre-fired raw materials in air at 120 ° C for 2 4 hours, (4) firing and grinding. (Page 15) 9 3 45259 3 VI. Orange light-emitting material (CaugPrui) Ιη2 04, prepared by applying for a patent, has phosphorescent radioactive material, and is excited by ultraviolet light and other excitation light sources under the wavelength of 2 2 ~ 3 50 nm It emits orange light. When the excitation light source is turned off, the orange light-emitting material emits red light and its light intensity gradually decays. In addition, the orange light-emitting material has an energy gap between 3 ~ 4eV and has an up-conversion (up- conversion) characteristics. Page 16