Flexible red fluorescent film

Abstract

The invention discloses a flexible red fluorescent film which is formed by powder and organic matter. The powder and the organic matter are in the mass ratio of (0.1-0.3):1, and the organic matter is polydimethylsiloxane; in the powder, in terms of the mass percentage of an oxide, the total content of 0%<Na2O+Li2O+K2O is smaller than 6.65%, the total content of 30%<WO3+M0O3 is smaller than 49.75%, the total content of 5%<Gd2O3+La2O3+Y2O3 is smaller than 34.95%, and the total content of 0%<Eu2O3 is smaller than 22.28%. The invention further provides a preparation method of the flexible red fluorescent film. The flexible red fluorescent film is simple in operation and low in cost, and problems about consistency and heat dissipation of fluorescent powder coating can be improved, and the flexible red fluorescent film is suitable for remote fluorescent powder LED packaging and large-scale, quantitative industrial production.

Description

technical field

[0001] The invention belongs to the field of material science and relates to a fluorescent film, in particular to a flexible red fluorescent film. Background technique

[0002] Because white LED devices have the advantages of high luminous efficiency, low power consumption and environmental friendliness, white light emitting diodes (LEDs) have attracted much attention in recent years. Because the phosphor is granular, it is easy to agglomerate on the substrate, and the adhesion to the substrate is also poor, and the thermal stability and uniformity are not good. Due to its good thermal stability, uniformity, and good adhesion to the substrate, fluorescent thin films have recently received more and more attention. The traditional dispensing method is not conducive to the heat dissipation of the LED chip, resulting in uneven white light and serious scattering. Because the fluorescent film is beneficial to the array packaging and heat dissipation of LED chips,...

Examples

Embodiment 1

[0017] 1) According to Na 2 O: La 2 o 3 :MgO:WO 3 : Eu 2 o 3 = 6.58: 20.74: 8.55: 49.2: 14.93 (based on oxide content) component ratio, accurately weigh 10g of NaCO 3 , La 2 o 3 , 4MgCO 3 ·Mg(OH) 2 ·5H 2 O, WO 3 , Eu 2 o 3 Put it in an agate mortar and grind it evenly, then place it in a muffle furnace and heat it at 1050°C for 18 hours, then cool it down to room temperature to finally get red phosphor.

[0018] 2) Accurately weigh 0.3148g of red fluorescent powder and 2.99g of organic matter according to the mass ratio of powder to organic matter of 0.18:1; among them, accurately weigh 2.7182 g of polydimethylsiloxane (A ) and 0.2718 g curing agent (B);

[0019] 3) Put the above mixture into a 10mL sample bottle, and sonicate in an ultrasonic generator for 40min;

[0020] 4) Transfer the sonicated sample to a watch glass;

[0021] 5) Dry at 100°C for 45 minutes to obtain a flexible red fluorescent film.

[0022] 5) Use the fluorescence spectrometer of model F...

technical field

[0001] The invention belongs to the field of material science and relates to a fluorescent film, in particular to a flexible red fluorescent film. Background technique

[0002] Because white LED devices have the advantages of high luminous efficiency, low power consumption and environmental friendliness, white light emitting diodes (LEDs) have attracted much attention in recent years. Because the phosphor is granular, it is easy to agglomerate on the substrate, and the adhesion to the substrate is also poor, and the thermal stability and uniformity are not good. Due to its good thermal stability, uniformity, and good adhesion to the substrate, fluorescent thin films have recently received more and more attention. The traditional dispensing method is not conducive to the heat dissipation of the LED chip, resulting in uneven white light and serious scattering. Because the fluorescent film is beneficial to the array packaging and heat dissipation of LED chips,...

Examples

Embodiment 1

[0017] 1) According to Na 2 O: La 2 o 3 :MgO:WO 3 : Eu 2 o 3 = 6.58: 20.74: 8.55: 49.2: 14.93 (based on oxide content) component ratio, accurately weigh 10g of NaCO 3 , La 2 o 3 , 4MgCO 3 ·Mg(OH) 2 ·5H 2 O, WO 3 , Eu 2 o 3 Put it in an agate mortar and grind it evenly, then place it in a muffle furnace and heat it at 1050°C for 18 hours, then cool it down to room temperature to finally get red phosphor.

[0018] 2) Accurately weigh 0.3148g of red fluorescent powder and 2.99g of organic matter according to the mass ratio of powder to organic matter of 0.18:1; among them, accurately weigh 2.7182 g of polydimethylsiloxane (A ) and 0.2718 g curing agent (B);

[0019] 3) Put the above mixture into a 10mL sample bottle, and sonicate in an ultrasonic generator for 40min;

[0020] 4) Transfer the sonicated sample to a watch glass;

[0021] 5) Dry at 100°C for 45 minutes to obtain a flexible red fluorescent film.

[0022] 5) Use the fluorescence spectrometer of model F...

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