CN109817686B - White organic light emitting diode display device and method of fabricating the same - Google Patents
White organic light emitting diode display device and method of fabricating the same Download PDFInfo
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Abstract
The invention provides a white organic light emitting diode display device, which comprises a double-layer organic fluorescent color conversion film. The double-layer organic fluorescent color conversion film comprises: the first color conversion film is arranged between the white light source and the color film layer, and is provided with a first conversion part which corresponds to the green color resistor and converts blue light into cyan-green light and a second conversion part which corresponds to the red color resistor and converts green light into yellow-orange light; and the second color conversion film is arranged between the first color conversion film and the color film layer, and is provided with a third conversion part which corresponds to the first conversion part and converts cyan and green light into green light and a fourth conversion part which corresponds to the second conversion part and converts yellow and orange light into red light.
Description
Technical Field
The invention relates to the technical field of display, in particular to a white organic light emitting diode display device and a manufacturing method thereof.
Background
An Organic Light Emitting Diode (OLED) display has advantages of self-luminescence, simple structure, lightness, thinness, fast response speed, wide viewing angle, low power consumption, and capability of realizing flexible display, and thus the OLED display has attracted attention in recent years.
The OLED display device for display is one of important elements in the OLED display. In the prior art, the color display of the OLED display device mainly uses the following two methods. One method is to fabricate an OLED display device having three subpixels of red, green and blue by a Fine Metal Mask (FMM), but this method is limited by the FMM, resulting in low resolution. Another method is to realize color display by combining white light and color film layers, which is not limited by a fine metal mask, but the display has the disadvantages of low color gamut and low backlight conversion efficiency.
Therefore, it is desirable to provide a white organic light emitting diode display device and a method for manufacturing the same to solve the problems of the prior art.
Disclosure of Invention
The invention aims to provide a white organic light emitting diode display device and a manufacturing method thereof, and aims to solve the technical problems of low color gamut and low backlight conversion efficiency in the prior art.
In order to solve the above technical problem, the present invention provides a white organic light emitting diode display device, comprising:
a white light source;
the color film layer is provided with a red color resistor, a green color resistor and a blue color resistor; and
a double-layer organic fluorescent color conversion film, the double-layer organic fluorescent color conversion film comprising:
the first color conversion film is arranged between the white light source and the color film layer, and is provided with a first conversion part which corresponds to the green color resistor and converts blue light into cyan-green light and a second conversion part which corresponds to the red color resistor and converts green light into yellow-orange light; and
the second color conversion film is arranged between the first color conversion film and the color film layer and is provided with a third conversion part which corresponds to the first conversion part and converts cyan and green light into green light and a fourth conversion part which corresponds to the second conversion part and converts yellow and orange light into red light.
In the white organic light emitting diode display device of the present invention, the first converting moiety comprises a rhodamine 19 derivative represented by the following chemical structure (one):
wherein the content of the first and second substances,
R1-R5 are-F, -Cl, -Br, -I or-CN, or have a non-conjugated structure, or have a conjugated structure connected through an alkoxy or ester group.
In the white organic light emitting diode display device of the present invention, the second converting moiety comprises a rhodamine B derivative represented by the following chemical structure (two):
wherein the content of the first and second substances,
R1-R5 are-F, -Cl, -Br, -I, -CN, -NH2、-COOH、-OH、-SH、-COH、-COO-、-COCl、-COBr、-CN、-NO2、-NH2NH, ≡ N, a benzene or phenol ring, or have a non-conjugated structure, or have a conjugated structure linked through an alkoxy or ester group.
In the white organic light emitting diode display device of the present invention, the conjugated structure in the chemical structure (two) has the following chemical structure (three):
wherein the content of the first and second substances,
r6 is alkoxy or an ester group;
r7 to R11 have a nonconjugated structure or a conjugated structure in which alkoxy groups or ester groups are bonded to each other.
In the white organic light emitting diode display device of the present invention, the third converting moiety comprises a rhodamine 6G derivative represented by the following chemical structure (iv):
wherein the content of the first and second substances,
R1-R6 are-F, -Cl, -Br, -I or-CN, or have a non-conjugated structure, or have a conjugated structure connected through alkoxy or ester groups;
R7-R10 are-F, -Cl, -Br, -I or-CN, or have a non-conjugated structure, or have a conjugated structure connected through alkoxy or ester groups;
r11 is-F, -Cl, -Br, -I or-CN, or has a non-conjugated structure, or has a conjugated structure connected through an alkoxy or ester group, or has the following chemical structure (V):
r18 has a non-conjugated structure or a conjugated structure linked through an alkoxy or ester group;
X-is F-、Cl-、Br-、CN-、ClO4 -、CF3SO3 -、CF2HSO3 -Or CFH2SO3 -。
In the white organic light emitting diode display device of the present invention, the conjugated structure in the chemical structure (iv) has the following chemical structure (six):
wherein the content of the first and second substances,
r12 is alkoxy or an ester group;
r13 to R17 have a nonconjugated structure or a conjugated structure in which alkoxy groups or ester groups are bonded to each other.
In the white organic light emitting diode display device of the present invention, the fourth converting moiety comprises a rhodamine 101 derivative represented by the following chemical structure (seven):
wherein the content of the first and second substances,
X-is F-、Cl-、Br-、CN-、ClO4 -、CF3SO3 -、CF2HSO3 -Or CFH2SO3 -；
R1-R4 are-F, -Cl, Br, -I, -CN, -NH2、-COOH、-OH、-SH、-COH、-COO-、-COCl、-COBr、-CN、-NO2、-NH2NH, ≡ N, a benzene or phenol ring, or having a non-conjugated structure, or having a conjugated structure linked through an alkoxy or ester group;
r5 is-F, -Cl, Br, -I, -CN, -NH2、-COOH、-OH、-SH、-COH、-COO-、-COCl、-COBr、-CN、-NO2、-NH2-NH, ≡ N, a benzene or phenol ring, or having a non-conjugated structure, or having a conjugated structure linked by an alkoxy or ester group, or having the following chemical structure (octa):
r12 has a non-conjugated structure or a conjugated structure linked through an alkoxy group or an ester group.
In the white organic light emitting diode display device of the present invention, the conjugated structure in the chemical structure (seven) has the following chemical structure (nine):
wherein the content of the first and second substances,
r6 is alkoxy or an ester group;
r7 to R11 have a nonconjugated structure or a conjugated structure in which alkoxy groups or ester groups are bonded to each other.
The present invention also provides a method of manufacturing a white organic light emitting diode display device, comprising:
providing a white light source;
providing a color film layer, wherein the color film layer is provided with a red color resistor, a green color resistor and a blue color resistor; and
set up a double-deck organic fluorescent color conversion membrane between white light source and the various rete, double-deck organic fluorescent color conversion membrane includes:
the first color conversion film is arranged between the white light source and the color film layer, and is provided with a first conversion part which corresponds to the green color resistor and converts blue light into cyan-green light and a second conversion part which corresponds to the red color resistor and converts green light into yellow-orange light; and
the second color conversion film is arranged between the first color conversion film and the color film layer and is provided with a third conversion part which corresponds to the first conversion part and converts cyan and green light into green light and a fourth conversion part which corresponds to the second conversion part and converts yellow and orange light into red light.
In the method of manufacturing a white organic light emitting diode display device of the present invention, the first conversion moiety comprises a rhodamine 19 derivative represented by the following chemical structure (one):
the second conversion moiety comprises a rhodamine B derivative represented by the following chemical structure (II):
the third conversion moiety comprises a rhodamine 6G derivative represented by the following chemical structure (IV):
the fourth switching moiety comprises a rhodamine 101 derivative represented by the following chemical structure (seven):
compared with the prior art, the invention provides a white organic light emitting diode display device and a manufacturing method thereof. The invention can solve the technical problems of low color gamut and low backlight conversion efficiency in the prior art by arranging the double-layer organic fluorescent color conversion film between the white light source and the color film layer.
Drawings
Fig. 1 is a cross-sectional side view of a white oled display device according to an embodiment of the invention.
Fig. 2 is a flowchart illustrating a method for preparing a bi-layer organic fluorescent color conversion film according to an embodiment of the present invention.
Fig. 3 shows the spectrum of a white light source.
Detailed Description
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 1, fig. 1 is a cross-sectional side view of a white organic light emitting diode display device according to an embodiment of the invention. The present invention provides a White Organic Light Emitting Diode (WOLED) display device 1000. The WOLED display device 1000 includes a white light source 100, a color film layer 300, and a double-layer organic fluorescent color conversion film 200.
The white light source 100 may emit light, such as red light 101, green light 102, and blue light 103. The spectrum of the white light source 100, as shown in fig. 3, shows that the cyan-green light band (as indicated by symbol a) and the yellow-orange light band (as indicated by symbol B) have weaker intensities.
The color film 300 has a red color resistor (R), a green color resistor (G), and a blue color resistor (B).
The dual-layer organic fluorescent color conversion film 200 includes a first color conversion film 210 and a second color conversion film 220. The first color conversion film 210 is disposed between the white light source 100 and the color film layer 300, and the first color conversion film 210 has a first conversion portion 211 corresponding to the green color resistor (G) and converting blue light into cyan-green light, and a second conversion portion 212 corresponding to the red color resistor (R) and converting green light into yellow-orange light. The second color conversion film 220 is disposed between the first color conversion film 210 and the color film layer 300, and the second color conversion film 220 has a third conversion portion 221 corresponding to the first conversion portion 211 and converting cyan-green light into green light and a fourth conversion portion 222 corresponding to the second conversion portion 212 and converting yellow-orange light into red light.
The first switching moiety 211 comprises a rhodamine 19 derivative represented by the following chemical structure (one):
wherein R1-R5 are-F, -Cl, -Br, -I or-CN, or have a non-conjugated structure, or have a conjugated structure connected through alkoxy or ester groups. The non-conjugated structure can be straight-chain alkane, branched-chain alkane, straight-chain or branched-chain alkane containing alkoxy, chain object containing ester group and fluorine substituted alkane derivative, wherein the carbon chain length is 1-30 carbon atoms. The conjugated structure can be a compound containing a heterocyclic ring, and the heterocyclic compound is a five-membered heterocyclic ring, a six-membered heterocyclic ring or a condensed ring heterocyclic compound and the like. The five-membered heterocyclic compound can be furan, thiophene, pyrrole, thiazole or imidazole, the six-membered heterocyclic compound can be pyridine, pyrazine, pyrimidine or pyridazine, and the fused ring heterocyclic compound can be indole, quinoline, pteridine or acridine.
The second switching moiety 212 comprises a rhodamine B derivative represented by the following chemical structure (two):
wherein R1-R5 are-F, -Cl, -Br, -I, -CN, -NH2、-COOH、-OH、-SH、-COH、-COO-、-COCl、-COBr、-CN、-NO2、-NH2NH, ≡ N, a benzene or phenol ring, or have a non-conjugated structure, or have a conjugated structure linked through an alkoxy or ester group. The non-conjugated structure can be straight-chain alkane, branched-chain alkane, straight-chain or branched-chain alkane containing alkoxy, chain object containing ester group and fluorine substituted alkane derivative, wherein the carbon chain length is 1-30 carbon atoms. The conjugated structure can be a compound containing a heterocyclic ring, and the heterocyclic compound is a five-membered heterocyclic ring, a six-membered heterocyclic ring or a condensed ring heterocyclic compound and the like. The five-membered heterocyclic compound can be furan, thiophene, pyrrole, thiazole or imidazole, the six-membered heterocyclic compound can be pyridine, pyrazine, pyrimidine or pyridazine, and the fused ring heterocyclic compound can be indole, quinoline, pteridine or acridine.
For example, the conjugated structure in the chemical structure (two) has the following chemical structure (three):
wherein R6 is an alkoxy group or an ester group; r7 to R11 have a nonconjugated structure or a conjugated structure in which alkoxy groups or ester groups are bonded to each other. The non-conjugated structure can be straight-chain alkane, branched-chain alkane, straight-chain or branched-chain alkane containing alkoxy, chain object containing ester group and fluorine substituted alkane derivative, wherein the carbon chain length is 1-25 carbon atoms. R7 to R11 may contain a benzene ring or an unsaturated cyclic substance, or have a chain structure of different length to be linked thereto.
The third converting moiety 221 includes a rhodamine 6G derivative represented by the following chemical structure (iv):
wherein the content of the first and second substances,
R1-R6 are-F, -Cl, -Br, -I or-CN, or have a non-conjugated structure, or have a conjugated structure connected through alkoxy or ester groups;
R7-R10 are-F, -Cl, -Br, -I or-CN, or have a non-conjugated structure, or have a conjugated structure connected through alkoxy or ester groups;
r11 is-F, -Cl, -Br, -I or-CN, or has a non-conjugated structure, or has a conjugated structure connected through an alkoxy or ester group, or has the following chemical structure (V):
r18 has a non-conjugated structure or a conjugated structure linked through an alkoxy or ester group;
X-is F-、Cl-、Br-、CN-、ClO4 -、CF3SO3 -、CF2HSO3 -Or CFH2SO3 -。
The non-conjugated structure can be straight-chain alkane, branched-chain alkane, straight-chain or branched-chain alkane containing alkoxy, chain object containing ester group and fluorine substituted alkane derivative, wherein the carbon chain length is 1-25 carbon atoms. The conjugated structure can be a compound containing a heterocyclic ring, and the heterocyclic compound is a five-membered heterocyclic ring, a six-membered heterocyclic ring or a condensed ring heterocyclic compound and the like. The five-membered heterocyclic compound can be furan, thiophene, pyrrole, thiazole or imidazole, the six-membered heterocyclic compound can be pyridine, pyrazine, pyrimidine or pyridazine, and the fused ring heterocyclic compound can be indole, quinoline, pteridine or acridine.
For example, the conjugated structure in the chemical structure (iv) has the following chemical structure (vi):
wherein R12 is an alkoxy group or an ester group; r13 to R17 have a nonconjugated structure or a conjugated structure in which alkoxy groups or ester groups are bonded to each other. The non-conjugated structure can be straight-chain alkane, branched-chain alkane, straight-chain or branched-chain alkane containing alkoxy, chain object containing ester group and fluorine substituted alkane derivative, wherein the carbon chain length is 1-25 carbon atoms. R13 to R17 may contain a benzene ring or an unsaturated cyclic substance, or have a chain structure of different length to be linked thereto.
The fourth switching moiety 222 comprises a rhodamine 101 derivative represented by the following chemical structure (seven):
wherein the content of the first and second substances,
X-is F-、Cl-、Br-、CN-、ClO4 -、CF3SO3 -、CF2HSO3 -Or CFH2SO3 -；
R1-R4 are-F, -Cl, Br, -I, -CN, -NH2、-COOH、-OH、-SH、-COH、-COO-、-COCl、-COBr、-CN、-NO2、-NH2NH, ≡ N, a benzene or phenol ring, or having a non-conjugated structure, or having a conjugated structure linked through an alkoxy or ester group;
r5 is-F, -Cl, Br, -I, -CN, -NH2、-COOH、-OH、-SH、-COH、-COO-、-COCl、-COBr、-CN、-NO2、-NH2-NH, ≡ N, a benzene or phenol ring, or having a non-conjugated structure, or having a conjugated structure linked by an alkoxy or ester group, or having the following chemical structure (octa):
r12 has a non-conjugated structure or a conjugated structure linked through an alkoxy group or an ester group.
The non-conjugated structure can be straight-chain alkane, branched-chain alkane, straight-chain or branched-chain alkane containing alkoxy, chain object containing ester group and fluorine substituted alkane derivative, wherein the carbon chain length is 1-30 carbon atoms. The conjugated structure can be a compound containing a heterocyclic ring, and the heterocyclic compound is a five-membered heterocyclic ring, a six-membered heterocyclic ring or a condensed ring heterocyclic compound and the like. The five-membered heterocyclic compound can be furan, thiophene, pyrrole, thiazole or imidazole, the six-membered heterocyclic compound can be pyridine, pyrazine, pyrimidine or pyridazine, and the fused ring heterocyclic compound can be indole, quinoline, pteridine or acridine.
For example, the conjugated structure in the chemical structure (seven) has the following chemical structure (nine):
wherein R6 is an alkoxy group or an ester group; r7 to R11 have a nonconjugated structure or a conjugated structure in which alkoxy groups or ester groups are bonded to each other. The non-conjugated structure can be straight-chain alkane, branched-chain alkane, straight-chain or branched-chain alkane containing alkoxy, chain object containing ester group and fluorine substituted alkane derivative, wherein the carbon chain length is 1-25 carbon atoms. R7 to R11 may contain a benzene ring or an unsaturated cyclic substance, or have a chain structure of different length to be linked thereto.
The present invention also provides a method of manufacturing a white organic light emitting diode display device, including:
providing a white light source 100;
providing a color film layer 300 having a red color resist (R), a green color resist (G) and a blue color resist (B); and
disposing a dual-layer organic fluorescent color conversion film 200 between the white light source 100 and the color film layer 300, wherein the dual-layer organic fluorescent color conversion film 200 comprises:
a first color conversion film 210, the first color conversion film 210 being disposed between the white light source 100 and the color film layer 300, the first color conversion film 210 having a first conversion portion 211 corresponding to the green color resistor (G) and converting blue light into cyan-green light and a second conversion portion 212 corresponding to the red color resistor (R) and converting green light into yellow-orange light; and
a second color conversion film 220, the second color conversion film 220 being disposed between the first color conversion film 210 and the color film layer 300, the second color conversion film 220 having a third conversion portion 221 corresponding to the first conversion portion 211 and converting cyan-green light into green light and a fourth conversion portion 222 corresponding to the second conversion portion 212 and converting yellow-orange light into red light.
The double-layer organic fluorescent color conversion film 200 is prepared by forming a surface-attached metal-organic frame (SURMOF) structure as a template, printing a fluorescent material on the SURMOF structure by Ink Jet Printing (IJP), and then curing the fluorescent material in a mesh of the SURMOF structure by using a thermal curing method. More specifically, referring to fig. 2, the method for preparing the dual-layer organic fluorescent color conversion film 200 includes the following steps:
1. first, a glass substrate (not shown) is cleaned using Extreme Ultraviolet (EUV), chemical, and deionized water. Adding a solution containing metal ions (a methanol solution of zinc acetate Zn (Ac))2) And terephthalic acid in methanol, wherein the molar ratio of zinc acetate to terephthalic acid is controlled in the range of 1: 2-1: 4, mixing and coating on the glass substrate. After baking at 80 ℃ for 20 minutes, the SURMOF structure 500 shown in step (a) of FIG. 2 can be obtained. The SURMOF structure 500 has a red color resistance corresponding portion 510, a green color resistance corresponding portion 520, and a blue color resistance corresponding portion 530. The film thickness of the SURMOF structure 500 can be controlled by the solid content of the applied solution and the application rate. Preferably, the thickness of the SURMOF structure is controlled to be 500-4000 nm.
2. Next, as shown in step (b) of fig. 2, the prepared fluorescent material 620 (including the rhodamine 6G derivative represented by the chemical structure (four)) for converting cyan green light into green light and the fluorescent material 610 (including the rhodamine 101 derivative represented by the chemical structure (seven)) for converting yellow orange light into red light are printed on the green color resist corresponding portion 520 and the red color resist corresponding portion 510 of the SURMOF structure 500, respectively, by an inkjet printing method.
3. Next, a thermal baking is performed at 230 ℃ for 20 minutes to fill and cure the fluorescent materials 620 and 610 in the mesh of the SURMOF structure 500, thereby obtaining the second color conversion film 220, as shown in step (c) of FIG. 2. The second color conversion film 220 has a third conversion part 221 converting cyan-green light into green light and a fourth conversion part 222 converting yellow-orange light into red light.
4. Then, the second color conversion film 220 is cleaned using Extreme Ultraviolet (EUV), a chemical, and deionized water. Adding a solution containing metal ions (a methanol solution of zinc acetate Zn (Ac))2) And terephthalic acid in methanol, wherein the molar ratio of zinc acetate to terephthalic acid is controlled in the range of 1: 2-1: 4, mixing and coating on the glass substrate. After baking at 80 ℃ for 20 minutes, the SURMOF structure 600 shown in step (d) of FIG. 2 can be obtained. The SURMOF structure 600 has a red color resistance corresponding portion 810, a green color resistance corresponding portion 820, and a blue color resistance corresponding portion 830. The thickness of the SURMOF structure 600 can be controlled by the solids content of the solution being applied and the rate of application. Preferably, the thickness of the SURMOF structure is controlled to be 500-4000 nm.
5. Then, as shown in step (e) of fig. 2, the prepared fluorescent material 720 (including the rhodamine 19 derivative shown in the above chemical structure (one)) for converting blue light into cyan-green light and the prepared fluorescent material 710 (including the rhodamine B derivative shown in the above chemical structure (two)) for converting green light into yellow-orange light are respectively printed on the green color resistance corresponding portion 820 and the red color resistance corresponding portion 810 of the SURMOF structure 500 by an inkjet printing method.
6. Next, a thermal baking is performed at 230 ℃ for 20 minutes to fill and cure the fluorescent materials 720 and 710 in the mesh of the SURMOF structure 500, thereby obtaining the first color conversion film 210, as shown in step (f) of FIG. 2. The first color conversion film 210 has a first conversion part 211 converting blue light into cyan-green light and a second conversion part 212 converting green light into yellow-orange light.
Referring to fig. 1 again, after the preparation method of the dual-layer organic fluorescent color conversion film 200 is completed, the dual-layer organic fluorescent color conversion film 200 may be disposed (e.g., by bonding) between the white light source 100 and the color film layer 300.
According to the present invention, the first color conversion film 210 has a first conversion part 211 corresponding to a green color resistance (G) and converting blue light into cyan-green light and a second conversion part 212 corresponding to a red color resistance (R) and converting green light into yellow-orange light. The second color conversion film 220 has a third conversion part 221 corresponding to the first conversion part 211 and converting cyan-green light into green light and a fourth conversion part 222 corresponding to the second conversion part 212 and converting yellow-orange light into red light. Accordingly, as shown in fig. 1, blue light 103 emitted from the white light source 100 to the green color resistance (R) may be converted into cyan-green light and further converted into green light 102. Also, the green light 102 emitted from the white light source 100 to the red color resistance (R) may be converted into yellow-orange light and further converted into red light 101. Therefore, the dual-layer organic fluorescent color conversion film 200 is disposed between the white light source 100 and the color film layer 300 to generate green light and red light, thereby improving the backlight conversion efficiency and increasing the color gamut of the display.
Compared with the prior art, the invention provides a white organic light emitting diode display device and a manufacturing method thereof. The invention can solve the technical problems of low color gamut and low backlight conversion efficiency in the prior art by arranging the double-layer organic fluorescent color conversion film between the white light source and the color film layer.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A white organic light emitting diode display device, comprising:
a white light source;
the color film layer is provided with a red color resistor, a green color resistor and a blue color resistor; and
a double-layer organic fluorescent color conversion film, the double-layer organic fluorescent color conversion film comprising:
the first color conversion film is arranged between the white light source and the color film layer, and is provided with a first conversion part which corresponds to the green color resistor and converts blue light into cyan-green light and a second conversion part which corresponds to the red color resistor and converts green light into yellow-orange light; and
a second color conversion film disposed between the first color conversion film and the color film layer, the second color conversion film having a third conversion portion corresponding to the first conversion portion and converting cyan-green light into green light and a fourth conversion portion corresponding to the second conversion portion and converting yellow-orange light into red light;
wherein the first converting moiety comprises a rhodamine 19 derivative represented by the following chemical structure (one):
wherein R1-R5 are-F, -Cl, -Br, -I or-CN, or have a non-conjugated structure, or have a conjugated structure connected through alkoxy or ester groups.
2. The white oled display device claimed in claim 1 wherein the second converting moiety includes a rhodamine B derivative represented by the following chemical structure (ii):
wherein the content of the first and second substances,
R1-R5 are-F, -Cl, -Br, -I, -CN, -NH2、-COOH、-OH、-SH、-COH、-COO-、-COCl、-COBr、-CN、-NO2、-NH2NH, ≡ N, a benzene or phenol ring, or have a non-conjugated structure, or have a conjugated structure linked through an alkoxy or ester group.
3. The white oled display device of claim 2 wherein the conjugated structure in the chemical structure (two) has the following chemical structure (three):
wherein the content of the first and second substances,
r6 is alkoxy or an ester group;
r7 to R11 have a nonconjugated structure or a conjugated structure in which alkoxy groups or ester groups are bonded to each other.
4. The white organic light emitting diode display device of claim 1, wherein the third conversion moiety comprises a rhodamine 6G derivative represented by the following chemical structure (iv):
wherein the content of the first and second substances,
R1-R6 are-F, -Cl, -Br, -I or-CN, or have a non-conjugated structure, or have a conjugated structure connected through alkoxy or ester groups;
R7-R10 are-F, -Cl, -Br, -I or-CN, or have a non-conjugated structure, or have a conjugated structure connected through alkoxy or ester groups;
r11 is-F, -Cl, -Br, -I or-CN, or has a non-conjugated structure, or has a conjugated structure connected through an alkoxy or ester group, or has the following chemical structure (V):
r18 has a non-conjugated structure or a conjugated structure linked through an alkoxy or ester group;
X-is F-、Cl-、Br-、CN-、ClO4 -、CF3SO3 -、CF2HSO3 -Or CFH2SO3 -。
5. The white oled display device of claim 4 wherein the conjugated structure in the chemical structure (IV) has the following chemical structure (VI):
wherein the content of the first and second substances,
r12 is alkoxy or an ester group;
r13 to R17 have a nonconjugated structure or a conjugated structure in which alkoxy groups or ester groups are bonded to each other.
6. The white oled display device claimed in claim 1 wherein the fourth converting moiety includes a rhodamine 101 derivative represented by the following chemical structure (seven):
wherein the content of the first and second substances,
X-is F-、Cl-、Br-、CN-、ClO4 -、CF3SO3 -、CF2HSO3 -Or CFH2SO3 -；
R1-R4 are-F, -Cl, Br, -I, -CN, -NH2、-COOH、-OH、-SH、-COH、-COO-、-COCl、-COBr、-CN、-NO2、-NH2NH, ≡ N, a benzene or phenol ring, or having a non-conjugated structure, or having a conjugated structure linked through an alkoxy or ester group;
r5 is-F, -Cl, Br, -I, -CN, -NH2、-COOH、-OH、-SH、-COH、-COO-、-COCl、-COBr、-CN、-NO2、-NH2-NH, ≡ N, a benzene or phenol ring, or having a non-conjugated structure, or having a conjugated structure linked by an alkoxy or ester group, or having the following chemical structure (octa):
r12 has a non-conjugated structure or a conjugated structure linked through an alkoxy group or an ester group.
7. The white oled display device of claim 6 wherein the conjugated structure in the chemical structure (seven) has the following chemical structure (nine):
wherein the content of the first and second substances,
r6 is alkoxy or an ester group;
r7 to R11 have a nonconjugated structure or a conjugated structure in which alkoxy groups or ester groups are bonded to each other.
8. A method of fabricating a white organic light emitting diode display device, comprising:
providing a white light source;
providing a color film layer, wherein the color film layer is provided with a red color resistor, a green color resistor and a blue color resistor; and
set up a double-deck organic fluorescent color conversion membrane between white light source and the various rete, double-deck organic fluorescent color conversion membrane includes:
the first color conversion film is arranged between the white light source and the color film layer, and is provided with a first conversion part which corresponds to the green color resistor and converts blue light into cyan-green light and a second conversion part which corresponds to the red color resistor and converts green light into yellow-orange light; and
a second color conversion film disposed between the first color conversion film and the color film layer, the second color conversion film having a third conversion portion corresponding to the first conversion portion and converting cyan-green light into green light and a fourth conversion portion corresponding to the second conversion portion and converting yellow-orange light into red light;
wherein the first converting moiety comprises a rhodamine 19 derivative represented by the following chemical structure (one):
wherein R1-R5 are-F, -Cl, -Br, -I or-CN, or have a non-conjugated structure, or have a conjugated structure connected through alkoxy or ester groups.
9. A method of fabricating a white light organic light emitting diode display device according to claim 8, wherein the second converting moiety comprises a rhodamine B derivative represented by the following chemical structure (two):
10. a method of fabricating a white light organic light emitting diode display device according to claim 8, wherein the third converting moiety comprises a rhodamine 6G derivative represented by the following chemical structure (iv):
the fourth switching moiety comprises a rhodamine 101 derivative represented by the following chemical structure (seven):
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| CN110808322A (en) * | 2019-10-14 | 2020-02-18 | 深圳市华星光电技术有限公司 | LED white light device and backlight module |
| CN111312751A (en) * | 2019-11-19 | 2020-06-19 | Tcl华星光电技术有限公司 | Display device and preparation method thereof |
| CN110993668B (en) * | 2019-12-10 | 2022-04-05 | Tcl华星光电技术有限公司 | White light OLED display device and manufacturing method thereof |
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