TWI603515B - Organic electroluminescence white light illumination device - Google Patents

Description

Organic electric excitation white light illumination device

The invention relates to an organic electroluminescent white light illumination device, in particular to ignite a phosphor by using light having a higher energy, and mixing to generate white light.

In the structure of a conventional illuminating white light illuminating device, it is common to use a red light emitting element, a green light emitting element, and a blue light emitting element to perform light mixing to form white light, that is, a so-called "three original light illuminating method", or use red The phosphors of the three primary light, green and blue, are driven by light energy or electric energy, and red, green and blue light are mixed into white light.

In the above-described manner, the "three original photoluminescence method" generally requires a step of separately fabricating three kinds of light-emitting elements. Although the production method has been mass-produced, it requires three steps of fabrication, so that the overall process time is long, and in addition, three types of phosphor powder are used. The way is because the fluorescent powder is expensive, and therefore, a white light emitting illumination device with simple process and cost saving is needed.

The main object of the present invention is to provide an organic electroluminescent white light illumination device comprising: a substrate, a transparent electrode layer, an electroluminescent layer, a metal electrode layer and at least one photoexcitation layer, wherein Exciting the light layer, when excited by the electric energy, emitting an electric laser to emit in the direction of the substrate; at least one photoexcitation layer comprises a plurality of phosphor powders, and has a porosity of 20 to 80%, and the phosphor powder is yellow phosphor powder And/or a mixture of red and green phosphors, and/or a mixture of red, green and blue phosphors, which are excited to emit yellow when exposed to light from the electroluminescent layer Light, and/or red and green light, and/or red light, green light, and blue light, and when the electric laser passes through the photoexcited layer, an electric laser that passes through the gap between the phosphors and the phosphor powder The emitted light is mixed to form white light, or the light emitted by the respective phosphors is mixed into white light.

Further, another object of the present invention is to provide the phosphor powder inside the substrate, and further, a protective layer may be disposed on the other surface of the substrate, and the phosphor powder may be disposed inside the protective layer. In this way, the high-energy light-emitting layer is excited by the organic electric field, and the light emitted by the high-energy light-emitting layer is used to excite the low-energy light-exciting material phosphor, so that the effect of arranging the white light illumination element can be produced in a more convenient manner.

The implementation of the present invention will be described in more detail below with reference to the drawings and component symbols, so that those skilled in the art can implement the present specification after studying the present specification.

Referring to the first figure, a schematic cross-sectional view of a first embodiment of an organic electroluminescent white light illumination device of the present invention. As shown in the first figure, the organic electroluminescent white light illumination device 1 of the present invention comprises a substrate 10, a transparent electrode layer 20, an electroluminescent layer 30, a metal electrode layer 40, and at least one photoexcitation layer 50. The substrate 10 is a transparent material such as glass, acryl, or other transparent plastic material. The transparent electrode layer 20 is formed on a surface of the substrate 10 as an anode, and is made of a transparent conductive material, such as a transparent conductive oxide. Such as indium tin oxide (ITO), aluminum zinc oxide (AZO), indium zinc oxide (IZO), or transparent organic semiconductor polymers, such as PEDOT/PSS ( An electric excitation layer 30 is disposed on the transparent electrode layer 20, and when excited by electric energy, an electric laser is emitted toward the substrate, and the wavelength of the electro-laser is 1 to 500 nm. For example, blue light, violet light, or ultraviolet light, the metal electrode layer 40 is disposed on the electroluminescent layer 30, and as a cathode, it can be made of silver, aluminum, lithium aluminum alloy, calcium, or molybdenum.

At least one photo-excited light layer 50 is disposed between the substrate 10 and the transparent electrode layer 20, and/or disposed on the other surface of the substrate 10, and includes a phosphor powder 55, which is a yellow phosphor powder. And/or a mixture of red and green phosphors, and/or a mixture of red, green, and blue phosphors. The phosphor powder 55 has a particle size of 0.5 to 50 μm, and at least one photoexcited layer 50 Having a porosity of 20 to 80% (i.e., a portion where the phosphor powder 55 is not filled), when the phosphor powder 55 in the photoexcitation layer 50 is excited by the light emitted from the electroluminescence layer 30, Light that emits yellow light, and/or red and green light, and/or red light, green light, and blue light, and passes through a gap between the phosphors in at least one of the light-exciting light layers 50 and the phosphor powder 55 The light emitted by the excitation is mixed to form white light, or the light emitted by the fluorescent powder 55 is mixed into white light. For example, blue light is used to excite yellow light, and blue light and yellow light are mixed into white light, or blue and purple light are used to excite red light and green light, and blue light, red light, and green light are mixed into white light, or ultraviolet light is excited. Blue light, green light and red light make blue light, red light and green light mixed into white light.

The yellow fluorescent powder may be at least one of YAG:Ce, Sr2SiO4:Eu ²⁺ and Sr ₃ SiO ₅ :Eu ²⁺ , and the green fluorescent powder may be (Ba,Sr) ₂ SiO _{4 :} Eu ²⁺ , SrSi At least one of ₃ N ₂ O ₂ :Eu ²⁺ and organic fluorescent powder AlQ ₃ , the red fluorescent powder is Sr ₂ Si ₃ N ₈ :Eu ²⁺ , Ca ₂ Si ₅ N ₈ :Eu ²⁺ and organic Fluorescent powder DCJBT: at least one of AlQ ₃ , at least one of blue organic phosphors B-AlQ ₃ and DPVBi.

Further, the organic electroluminescent white light illumination device 1 further includes a protective layer 60, a seal layer 70, a cap layer 80, and a getter 90 disposed on the other surface of the substrate 10. Or on the photoexcited light layer 50 for protecting the substrate 10 or the photoexcited light layer 50. The protective layer 60 is a transparent material composed of yttrium oxide (SiO _x ), tantalum nitride (SiN _y ), At least one of yttrium oxynitride (SiO _x N _y ), polyimide (polyimide), and epoxy resin. The sealing layer 70 connects the capping layer 80 to the substrate 10, and seals the transparent electrode layer 20, the electroluminescent layer 30, the metal electrode layer 40, and/or the at least one photoexcitation layer 50 to insulate the air and inhale. The agent 90 is disposed on the inner surface of the capping layer 80 for absorbing moisture and air to increase the sealing effect and improving the life of the organic electroluminescent white light illuminating device 1.

Referring to the second and third figures, a cross-sectional view of a second embodiment and a third embodiment of the organic electroluminescent white light illumination device of the present invention. The organic electroluminescent white light illumination device 2, 3 of the second embodiment of the present invention is a modification of the first embodiment. In the second embodiment, the phosphor powder 55 is directly disposed in the substrate 15, in the substrate 15. The porosity (i.e., the portion of the phosphor powder 55 that is not filled) is 20 to 80%, and in the third embodiment, the phosphor powder 55 is directly disposed in the protective layer 65, and the pores in the protective layer 65 The rate (i.e., the portion of the phosphor powder 55 that is not filled) is 20 to 80%.

The invention is characterized in that the high-energy light-emitting layer is excited by the organic electric field, and the light emitted by the high-energy light-emitting layer is used to excite the low-energy light-exciting material phosphor powder, so that the effect of configuring the white light-emitting component can be produced in a more convenient manner. At the same time, manufacturing costs are reduced by reducing the amount of phosphor powder used.

The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the present invention in any way, and any modifications or alterations to the present invention made in the spirit of the same invention. All should still be included in the scope of the intention of the present invention.

1‧‧‧Organic electric excitation white light illumination device

2‧‧‧Organic electric excitation white light illumination device

3‧‧‧Organic electric excitation white light illumination device

10‧‧‧Substrate

15‧‧‧Substrate

20‧‧‧Transparent electrode layer

30‧‧‧Electrical excitation layer

40‧‧‧Metal electrode layer

50‧‧‧Light excitation layer

55‧‧‧Fluorescent powder

60‧‧‧Protective layer

65‧‧‧Protective layer

70‧‧‧ Sealing layer

80‧‧ ‧ cover layer

90‧‧‧ getter

The first figure is a schematic cross-sectional view of a first embodiment of an organic electroluminescent white light illumination device of the present invention.

The second figure is a schematic cross-sectional view of a first embodiment of an organic electroluminescent white light illumination device of the present invention.

The third figure is a schematic cross-sectional view of a first embodiment of an organic electroluminescent white light illumination device of the present invention.

1‧‧‧Organic electric excitation white light illumination device

10‧‧‧Substrate

20‧‧‧Transparent electrode layer

30‧‧‧Electrical excitation layer

40‧‧‧Metal electrode layer

50‧‧‧Light excitation layer

55‧‧‧Fluorescent powder

60‧‧‧Protective layer

70‧‧‧ Sealing layer

80‧‧ ‧ cover layer

90‧‧‧ getter

Claims (14)

An organic electroluminescent white light illumination device comprising: a substrate as a transparent material; a transparent electrode layer formed on a surface of the substrate and made of a transparent conductive material; an electroluminescent layer disposed on Above the transparent electrode layer, when excited by electrical energy, emits an electric laser to emit toward the substrate, the electric laser comprising at least one of blue light, violet light and ultraviolet light, and having a wavelength of 1-500 nm; a metal electrode a layer disposed on the electroluminescent layer; and at least one photoexcitation layer disposed between the substrate and the transparent electrode layer, or between the substrate and the transparent electrode layer and the other surface of the substrate And comprising a plurality of phosphor powders, wherein the phosphor powder has a particle diameter of 0.5 to 50 μm and the at least one photoexcited light layer comprises a porosity of 20 to 80%, and the phosphor powder is a plurality of yellow phosphors a mixture of powder, a plurality of red fluorescent powders and a plurality of green fluorescent powders, or a plurality of red fluorescent powders, a plurality of green fluorescent powders, and a plurality of blue fluorescent powders The fluorescent light is excited by an electric laser The powder emits yellow light, red light and green light, or red light, green light and blue light, and when the electric laser light passes through the at least one light emitting layer, the light emitted by the fluorescent powder is mixed into white light, and The electro-laser that passes through the gap between the phosphors mixes with the light emitted by the phosphors to form white light. The organic electroluminescent white light illumination device of claim 1, further comprising a protective layer, a seal layer, a cap layer and a getter disposed on the other surface of the substrate And protecting the substrate or the photo-exciting layer, the protective layer is a transparent material, and the sealing layer connects the capping layer to the substrate, and the transparent layer is transparent The electrode layer, the electroluminescent layer, the metal electrode layer, and the at least one photo-exciting layer are sealed to block air, and the getter is disposed on an inner surface of the capping layer for absorbing moisture and air. The organic electroluminescent white light illumination device of claim 1, wherein the substrate is made of glass, acrylic, or a transparent plastic material; the transparent electrode layer is made of a transparent conductive oxide or a transparent organic The semiconductor polymer is made of; and the metal electrode layer is made of at least one of silver, aluminum, lithium aluminum alloy, calcium, and molybdenum. The organic electroluminescent white light illumination device according to claim 1, wherein the yellow fluorescent powder is at least one of YAG:Ce, Sr 2 SiO 4 :Eu 2+ and Sr 3 SiO 5:Eu 2+ First, the green phosphors may be at least one of (Ba, Sr) 2 SiO 4 : Eu 2+ , SrSi 3 N 2 O 2 : Eu 2+ , and organic phosphor powder AlQ 3 , the red phosphors Is at least one of Sr 2 Si 3 N 8:Eu 2+ , Ca 2 Si 5 N 8:Eu 2+ and organic phosphor powder DCJBT:AlQ 3 , the blue organic phosphor powder B-AlQ 3 and At least one of DPVBi. The organic electroluminescent white light illumination device of claim 2, wherein the protective layer is made of at least one of cerium oxide, cerium nitride, cerium oxynitride, polyamidonia, and epoxy resin. production. An organic electroluminescent white light illumination device comprising: a substrate made of a transparent material and comprising a plurality of phosphor powders therein, wherein the phosphor powder has a particle diameter of 0.5 to 50 μm; a transparent electrode layer, Formed on a surface of the substrate, made of a transparent conductive material; an electroluminescent layer disposed on the transparent electrode layer, when excited by electrical energy, emits an electric laser to be emitted toward the substrate, The electro-laser comprises at least one of blue light, violet light and ultraviolet light, and has a wavelength of 1-500 nm; a metal electrode layer disposed on the electroluminescent light layer; and wherein the substrate comprises a porosity of 20-80% , the phosphor powder is yellow Mixing of light powder, red fluorescent powder and green fluorescent powder, or mixing of red fluorescent powder, green fluorescent powder and blue fluorescent powder, when emitted by the electric laser, emits yellow light , red light and green light, or red light, green light and blue light, and when the electric laser light passes through the substrate, the light emitted by the fluorescent powder is mixed into white light, and the fluorescent powder is passed through The electro-laser between the gaps is excited by the light emitted by the phosphors to form white light. The organic electroluminescent white light illumination device of claim 6, further comprising a protective layer, a seal layer, a cap layer and a getter disposed on the other surface of the substrate The protective layer is a transparent material, and the sealing layer connects the capping layer to the substrate, and the transparent electrode layer, the electroluminescent layer, the metal electrode layer, and the At least one photoexcitation layer is sealed to block air, and the getter is disposed on an inner surface of the capping layer for absorbing moisture and air. The organic electroluminescent white light illumination device of claim 6, wherein the substrate is made of glass, acrylic, or a transparent plastic material; the transparent electrode layer is made of a transparent conductive oxide or a transparent organic The semiconductor polymer is made of; and the metal electrode layer is made of at least one of silver, aluminum, lithium aluminum alloy, calcium, and molybdenum. The organic electroluminescent white light illumination device according to claim 6, wherein the yellow fluorescent powder is at least one of YAG:Ce, Sr 2 SiO 4 :Eu 2+ and Sr 3 SiO 5:Eu 2+ First, the green phosphors may be at least one of (Ba, Sr) 2 SiO 4 : Eu 2+ , SrSi 3 N 2 O 2 : Eu 2+ , and organic phosphor powder AlQ 3 . The light powder is at least one of Sr 2 Si 3 N 8:Eu 2+ , Ca 2 Si 5 N 8:Eu 2+ and organic fluorescent powder DCJBT:AlQ3, and the blue organic fluorescent powder B-AlQ 3 And at least one of DPVBi. The organic electroluminescent white light illumination device of claim 7, wherein the protective layer is made of at least one of cerium oxide, cerium nitride, cerium oxynitride, polyamidonia, and epoxy resin. production. An organic electroluminescent white light illumination device comprising: a substrate as a transparent material; a transparent electrode layer formed on a surface of the substrate and made of a transparent conductive material; an electroluminescent layer disposed on Above the transparent electrode layer, when excited by electrical energy, emits an electric laser to emit toward the substrate, the electric laser comprising at least one of blue light, violet light and ultraviolet light, and having a wavelength of 1-500 nm; a metal electrode a layer disposed on the electroluminescent layer; and a protective layer disposed on the other surface of the substrate, comprising a plurality of phosphor powders, wherein the phosphor powder has a particle diameter of 0.5 to 50 μm, and the protective layer Containing a porosity of 20 to 80%, the phosphor powder is a mixture of yellow phosphor powder, red phosphor powder and green phosphor powder, or red phosphor powder, green phosphor powder and blue phosphor Mixing of the light powder, when excited by the electric laser, the phosphors emit yellow, red and green light, or red light, green light and blue light, and the electric laser passes through the protective layer When the phosphor is excited, the light emitted by the phosphor is mixed into white light, and The electro-laser that passes through the gap between the phosphors mixes with the light emitted by the phosphors to form white light. The organic electroluminescent white light illumination device of claim 11, further comprising a seal layer, a cap layer and a getter, the seal layer connecting the cap layer to the substrate, and The transparent electrode layer, the electroluminescent layer, the metal electrode layer, and the at least one photoexcitation layer are sealed to block air, and the getter is disposed on an inner surface of the capping layer for absorbing moisture And the air. Organic electroluminescent white light illumination device as described in claim 11 The substrate is made of glass, acrylic, or a transparent plastic material; the transparent electrode layer is made of a transparent conductive oxide or a transparent organic semiconductor polymer; the metal electrode layer is made of silver, aluminum, At least one of lithium aluminum alloy, calcium, and molybdenum; and the protective layer is made of at least one of cerium oxide, cerium nitride, cerium oxynitride, polyarylene, and epoxy resin. . The organic electroluminescent white light illumination device according to claim 11, wherein the yellow fluorescent powder is at least one of YAG:Ce, Sr 2 SiO 4 :Eu 2+ and Sr 3 SiO 5:Eu 2+ First, the green phosphors may be at least one of (Ba, Sr) 2 SiO 4 : Eu 2+ , SrSi 3 N 2 O 2 : Eu 2+ , and organic phosphor powder AlQ 3 , and the red phosphors The powder is at least one of Sr 2 Si 3 N 8:Eu 2+ , Ca 2 Si 5 N 8:Eu 2+ and organic phosphor powder DCJBT:AlQ 3 , and the blue organic phosphor powder B-AlQ 3 And at least one of DPVBi.