TW201436326A - Full-band and high-CRI organic light-emitting diode - Google Patents

Abstract

The present invention relates to a full-band and high-CRI organic light-emitting diode, comprising: a first conductive layer, at least one first carrier transition layer, a plurality of light-emitting layers, at least one second carrier transition layer, and a second conductive layer. In the present invention, a plurality of dye are doped in the light-emitting layers, so as to make the light-emitting layers emit a plurality of blackbody radiation complementary lights, wherein the chromaticity coordinates of the blackbody radiation complementary lights on 1931 CIE (Commission International de'Eclairage) Chromaticity Diagram surround to a specific area, and this specific area fully encloses the Planck's locus. Therefore, the blackbody radiation complementary lights are mixed to a full-band and high-CRI light.

Description

Full-band ultra-high color rendering organic light-emitting diode

The invention relates to an organic light-emitting diode, in particular to a full-band ultra-high color rendering organic light-emitting diode.

In 1987, Kodak's CWTang and SAVanSlyke published the creation of Organic Light Emitting Device (OLED). Tang and VanSlyke used vacuum evaporation to transfer the hole transport material and electrons respectively. A material, such as Alq3, is plated on the ITO glass, and then a metal electrode is vapor-deposited, thus completing self-luminescence, high brightness, high-speed reaction, light weight, thin thickness, low power consumption, wide viewing angle, Flexible, and fully color-developable organic electroluminescent diodes (OLEDs).

At present, in addition to the light-emitting layer, other dielectric layers, such as an electron transport layer and a hole transport layer, are added between the anode and the cathode to increase the luminous efficacy of the organic electroluminescent diode. . Please refer to the first figure, which is a structural diagram of a conventional organic electroluminescent diode. As shown in the first figure, the conventional organic electroluminescent diode 1' includes: a cathode 11', an electron injection layer. 12', an electron transport layer 13', a first light-emitting layer 14', a second light-emitting layer 15', a hole transport layer 16', A hole injection layer 17', and an anode 18'.

The conventional organic electroluminescent diode 1' is a high-efficiency organic electroluminescent diode; however, it is an organic electroluminescent diode, and the color rendering of the emitted light is not good, therefore, The organic electroluminescent diode 1' is not suitable as a light source for long-term use. In view of this, the inventors of the present invention have vigorously studied and invented, and finally developed a full-band ultra-high color rendering organic light-emitting diode of the present invention.

The main object of the present invention is to provide a full-band ultra-high color rendering organic light-emitting diode, which is mainly doped with a plurality of dyes in a plurality of light-emitting layers of an organic light-emitting diode, so that the light-emitting layers can be Generating a plurality of black body radiation complementary lights; and, since the black body radiates complementary light on a plurality of color coordinates on the CIE coordinate map, the range encompasses the Planck's locus that completely covers the CIE coordinate map, Therefore, the light system in which the black body radiation complementary light is mixed is a high-color color light source of a full-band.

Therefore, in order to achieve the above object of the present invention, the inventors of the present invention have proposed a full-band ultra-high color rendering organic light-emitting diode comprising: a first conductive layer; at least a first carrier transition layer formed in the Above the first conductive layer; a plurality of light emitting layers are formed on the first carrier transition layer; at least one second carrier transition layer is formed on the light emitting layer; and a second conductive layer, Formed in the second carrier transition Above the layer; wherein a plurality of dye systems are doped in the plurality of light-emitting layers, such that the light-emitting layers can emit a plurality of black body radiation complementary lights, and the plurality of black body radiation complementary light systems are mixed to form a high color rendering light source .

〔this invention〕

1‧‧‧Full-band ultra-high color rendering organic light-emitting diode

11‧‧‧First conductive layer

12‧‧‧ hole injection layer

13‧‧‧ hole transport layer

14‧‧‧First luminescent layer

15‧‧‧second luminescent layer

16‧‧‧third luminescent layer

17‧‧‧Electronic transport layer

18‧‧‧Electronic injection layer

CML‧‧‧ carrier modulation layer

19‧‧‧Second conductive layer

[study]

1'‧‧‧ Organic Electroluminescence Excited Dipole

11'‧‧‧ cathode

12'‧‧‧Electronic injection layer

13’‧‧‧Electronic transport layer

14’‧‧‧First luminescent layer

15’‧‧‧second luminescent layer

16’‧‧‧ hole transport layer

17'‧‧‧ hole injection layer

18'‧‧‧Anode

The first figure is a structural diagram of a conventional organic electroluminescent diode; the second figure is an architectural diagram of a full-band ultra-high color rendering organic light-emitting diode of the present invention; the third picture is a full-band ultra-high color rendering. The first experimental structure diagram of the organic light-emitting diode; the fourth picture is a material composition table of the full-band ultra-high color rendering organic light-emitting diode; the fifth picture is issued by the full-band ultra-high color rendering organic light-emitting diode The energy spectrum of the high color rendering light source; the sixth picture is the CIE coordinate map of the multiple black body radiation complementary light emitted by the full-band ultra-high color rendering organic light-emitting diode; the seventh picture is the full-band ultra-high color rendering organic light The material composition table of the second experimental structure of the diode; the eighth picture is the energy spectrum of the high color rendering light source emitted by the full-band ultra-high color rendering organic light-emitting diode; the ninth picture is the full-band ultra-high color rendering a CIE coordinate map of a plurality of black body radiation complementary lights emitted by the organic light emitting diode; Figure 11 is a diagram showing the energy band architecture of a second embodiment of a full-band ultra-high color rendering organic light-emitting diode of the present invention.

In order to more clearly describe a full-band ultra-high color rendering organic light-emitting diode proposed by the present invention, a preferred embodiment of the present invention will be described in detail below with reference to the drawings.

Please refer to the second figure, which is a structural diagram of a full-band ultra-high color rendering organic light-emitting diode of the present invention. As shown in the second figure, the full-band ultra-high color rendering organic light-emitting diode 1 of the present invention mainly includes: a first conductive layer 11, at least a first carrier transition layer, a plurality of light-emitting layers, and at least a second a carrier transition layer and a second conductive layer. The first conductive layer 11 serves as an anode, and the second conductive layer 19 serves as a cathode.

In the embodiment of the full-band ultra-high color rendering organic light-emitting diode 1, the first carrier transition layer is formed on the first conductive layer 11 and includes a hole injection layer 12 and a hole transmission. Layer 13. In addition, the plurality of light emitting layers are formed on the hole transport layer 13, and the plurality of light emitting layers are composed of a first light emitting layer 14, a second light emitting layer 15, and a third light emitting layer 16. The second carrier transition layer is formed on the third light emitting layer 16 and includes an electron transport layer 17 and an electron injection layer 18.

Here, it must be particularly noted that although the architecture of the full-band ultra-high color rendering organic light-emitting diode 1 shown in the second figure is the hole injection layer 12 and the hole transport layer 13 as the first carrier transition. Layer, but not This limits the architecture or implementation of the first carrier transition layer; when the invention is actually implemented, the first carrier transition layer can also be a single hole injection layer or a single hole transmission layer. Likewise, it is not limited that the plurality of luminescent layers must be composed of three luminescent layers. Similarly, the second carrier transition layer must not include an electron transport layer 17 and an electron injection layer 18, and the second carrier transition layer can also be a single electron injection layer or a single electron transport layer. Furthermore, as shown in the second figure, a second conductive layer 19 is formed over the electron injection layer 18. In particular, in the present invention, a plurality of dyes (not shown) are doped within the plurality of light-emitting layers such that the light-emitting layers emit a plurality of black body radiation complementary lights, and the plurality of black body radiations are complementary The light system is mixed into a high color rendering light source.

In order to explain in more detail the architecture of the full-band ultra-high color rendering organic light-emitting diode of the present invention and its technical features, the following will be explained with the aid of experimental data. Please refer to the second figure again, and please refer to the third and fourth figures at the same time, which is the first experimental architecture diagram of the full-band ultra-high color rendering organic light-emitting diode and its material composition table. As shown in the third figure, in the first experimental framework, Indium Tin Oxide (ITO) is used as the anode (ie, the first conductive layer 11), and HATCN (Hexaazatriphenylenehexacabonitrile) is used as the hole injection layer 12, Take TAPC(1,1-Bis[4-[N,N'-di(p-tolyl)amino]phenyl]cyclohexane) (Chinese alias: 4,4'-cyclohexyl bis[N,N-di(4- Methylphenyl)aniline) as the hole transport layer 13, with TDAF(2,7-Bis[9,9-di(4-Methylphenyl)-fluoren-2-yl]-9,9-di(4-M) ) (Chinese Name: TDAF) as the first luminescent layer 14, with Spiro-2CBP (2,7-Bis(9-carbazolyl)-9,9-sspirobifluorene) (Chinese alias: Spiro-2CBP) as the second luminescent layer 15, to Dczppy (2,6-bis[3'-(N-carbazole)phenyl]pyridine) (Chinese alias: Dczppy) as the third luminescent layer 16, with BmPyPb (1,3-bis(3,5-dipyrid-3-yl) -phenyl)benzene) (Chinese alias: BmPyPb) as the electron transport layer 17, LiF (Chinese alias: lithium fluoride) as the electron injection layer 18, and Al (Chinese alias: aluminum) as the cathode (ie, the second conductive layer) 19).

As described above, in the first architecture described above, the first luminescent layer 14 has a weight percentage (wt%) of 0.2, and it emits a deep blue light black body radiation complementary light. Moreover, the second luminescent layer 15 is doped with 0.17 wt% orange red dye, 0.24 wt% yellow dye, and 0.42 wt% green dye, so that the second luminescent layer 15 can emit a reddish black body. Radiation complementary light, a black body radiating complementary light of a yellow light and a black body radiating complementary light of a green light. Furthermore, the third luminescent layer 16 is doped with 0.18 wt% of the sky blue dye and 0.41 wt% of the deep red dye, so that the third luminescent layer 16 can emit a black light radiating complementary light and a deep red light of one day. The black body radiates complementary light.

Please refer to the fifth figure, which is an energy spectrum diagram of the high color rendering light source emitted by the full-band ultra-high color rendering organic light-emitting diode; and, please refer to the sixth figure, which is a plurality of black body radiation complementary lights. CIE coordinates map. As shown in the fifth figure, the dark blue light body radiates complementary light, the orange The red body of the black body radiates complementary light, the yellow light black body radiation complementary light, the green light black body radiation complementary light, the blue light black body radiation complementary light, and the deep red light black body radiation complementary light system are mixed into a full band The color rendering light source; and, as shown in the fourth figure, the full-band high color rendering light source has a CRI of 92.2 and a color temperature (CT) of 3639K.

In addition, the dark blue black body radiation complementary light, the orange red light black body radiation complementary light, the yellow light black body radiation complementary light, the green light black body radiation complementary light, the blue light black body radiation complementary light, and the deep red light The color coordinates of the black body radiation complementary light on the CIE coordinate map are (0.17, 0.07), (0.57, 0.43), (0.49, 0.51), (0.29, 0.58), (0.18, 0.34), and (0.64, 0.36). And the range enclosed by the six color coordinates is a Planck's locus that completely covers the CIE coordinate map, which is also called a Blackbody Radiation Curve.

The second experimental framework of the full-band ultra-high color rendering organic light-emitting diode is continuously explained. Please refer to the seventh figure, which is a material composition table of the second experimental framework of the full-band ultra-high color rendering organic light-emitting diode. As shown in the seventh embodiment, different from the foregoing first experimental framework, in the second experimental structure, the weight percentage (wt%) of the first luminescent layer 14 is 0.32, and the second luminescent layer 15 is doped. Mixed with 0.24 wt% orange red dye, 0.2 wt% yellow dye and 0.6 wt% green dye, and the third light-emitting layer 16 is doped with 0 wt% of sky blue dye and 0.47 wt% deep red Light dyes.

Please refer to the eighth picture, which is the full-band super-high color rendering organic An energy spectrum of a high color rendering light source emitted by the light emitting diode; and, see also the ninth figure, a CIE coordinate map doped with the complementary light of the plurality of black body radiation. As shown in the eighth figure, the dark blue light body complementary light, the orange red light body body complementary light, the yellow light black body radiation complementary light, the green light black body radiation complementary light, the blue light black body radiation complementary light, And the deep red light black body radiation complementary light system is mixed into a full-band high color rendering light source; and, as shown in the seventh figure, the full-band high color rendering light source has a CRI of 92.2 and a color temperature (CT). It is 3639K.

In addition, the dark blue black body radiation complementary light, the orange red light black body radiation complementary light, the yellow light black body radiation complementary light, the green light black body radiation complementary light, and the deep red light black body radiation complementary light on the CIE coordinate map The color coordinates are (0.17, 0.07), (0.57, 0.43), (0.49, 0.51), (0.29, 0.58), and (0.64, 0.36), and the range enclosed by the five color coordinates is complete. Covers the Planck's locus on the CIE coordinate map.

Thus, experimental data via the first experimental framework and the second experimental architecture described above. It can be known that the full-band ultra-high color rendering organic light-emitting diode structure of the present invention is indeed feasible, and indeed can emit a full-band high color rendering light source, and the high color rendering light source can be a low color temperature orange red light or a high color temperature. White light, or other light color with higher color temperature. Furthermore, as long as the black body radiates complementary light in a range enclosed by a plurality of color coordinates on the CIE coordinate map, the Planck's curve on the CIE coordinate map can be completely covered (Planck's Locus), the organic light-emitting diode can emit a high-color color light source of the whole band; the number of complementary light of the black body radiation is not limited to 6, 5 or 4. In addition, it must be added that, through the above experimental results, we can further determine that if the spectrum of the complementary light of the plurality of black body radiation is a single peak spectrum, the full color band of the color rendering light source is in the CRI. The value of the table will be better.

In addition, the full-band ultra-high color rendering organic light-emitting diode of the present invention further includes a second embodiment. Please refer to the tenth figure, which is an energy band architecture diagram of a second embodiment of the full-band ultra-high color rendering organic light-emitting diode of the present invention. As shown in the tenth embodiment, different from the foregoing first embodiment, in the second embodiment, the system further includes a carrier modulation layer CML, wherein the carrier modulation layer CML is disposed on the first illumination. The layer 14 and the second luminescent layer 15 are used to adjust the illuminating intensity of the first luminescent layer 14 and the second luminescent layer 15. However, it must be particularly noted that, in the practice of the present invention, the position of the carrier modulation layer CML can be adjusted according to different needs, for example, the carrier modulation layer CML is disposed on the second light-emitting layer 15 and the third Between the light-emitting layers 16, the light-emitting intensity of the second light-emitting layer 15 and the third light-emitting layer 16 is adjusted.

Thus, the above-mentioned system has completely and clearly explained the full-band ultra-high color rendering organic light-emitting diode of the present invention, and, through the above, we can know that the main technical features of the present invention are as follows:

1. The invention mainly applies a plurality of dyes to organic light-emitting two Within the plurality of luminescent layers of the polar body, the luminescent layers can emit a plurality of black body radiation complementary lights, and the plurality of black body radiation complementary light systems are mixed to form a high color rendering light source.

2. In accordance with point 1 above, in addition, the range enclosed by the plurality of color coordinates of the black body radiation complementary light on the CIE coordinate map includes the Planck's locus which completely covers the CIE coordinate map. Therefore, the light system in which the black body radiates complementary light is a high color rendering light source.

3. Furthermore, it is found through the experimental results that if the spectrum of the complementary light of the plurality of black bodies is a single peak spectrum, the high color rendering light source of the full band will be better on the CRI value table.

It is to be understood that the foregoing detailed description of the embodiments of the present invention is not intended to Both should be included in the scope of the patent in this case.

1‧‧‧Full-band ultra-high color rendering organic light-emitting diode

11‧‧‧First conductive layer

12‧‧‧ hole injection layer

13‧‧‧ hole transport layer

14‧‧‧First luminescent layer

15‧‧‧second luminescent layer

16‧‧‧third luminescent layer

17‧‧‧Electronic transport layer

18‧‧‧Electronic injection layer

19‧‧‧Second conductive layer

Claims (10)

A full-band ultra-high color rendering organic light-emitting diode includes: a first conductive layer; at least one first carrier transition layer is formed on the first conductive layer; and a plurality of light-emitting layers are formed on Above the first carrier transition layer; at least one second carrier transition layer is formed on the light-emitting layer; and a second conductive layer is formed on the second carrier transition layer; A plurality of dyes are doped in the plurality of light-emitting layers, such that the light-emitting layers can emit a plurality of black body radiation complementary lights, and the plurality of black body radiation complementary light systems are mixed to form a high color rendering light source. The full-band ultra-high color rendering organic light-emitting diode according to claim 1, wherein the first conductive layer serves as an anode, and the second conductive layer functions as a cathode. The full-band ultra-high color rendering organic light-emitting diode according to claim 1, wherein the plurality of black body radiation complementary light systems comprise: a deep red light, an orange red light, a yellow light, a green light, One day of blue light, and one deep blue light. The full-band ultra-high color rendering organic light-emitting diode according to claim 1, wherein the plurality of black body radiation complementary light systems comprise: a deep red light, an orange red light, a yellow light, a green light, And a deep blue light. The full-band ultra-high color rendering organic light-emitting diode according to claim 1, wherein the plurality of black body radiation complementary light systems comprise: Crimson light, a yellow light, a day of blue light, and a deep blue light. The full-band ultra-high color rendering organic light-emitting diode according to claim 1, wherein the first carrier transition layer comprises a hole injection layer and a hole transport layer. The full-band ultra-high color rendering organic light-emitting diode according to claim 1, wherein the second carrier transition layer comprises an electron transport layer and an electron injection layer. The full-band ultra-high color rendering organic light-emitting diode according to claim 1, wherein the second carrier transition layer is an electron transport layer. The full-band ultra-high color rendering organic light-emitting diode according to claim 1, further comprising a carrier modulation layer formed on any of the light-emitting layers for adjusting the light-emitting layer Black body radiates the intensity of complementary light. The full-band ultra-high color rendering organic light-emitting diode according to claim 9, wherein the color temperature of the high color rendering light source can be any of the following: high color temperature and low color temperature.