Organic diode for vehicle-mounted illumination

Abstract

The invention relates to an organic diode for vehicle-mounted illumination, and belongs to the field of manufacturing of vehicle electronic devices. The preparation method comprises the following steps: mixing an acetone solution containing Au (tht) Cl with an acetone solution containing HC2R (R = C6H110), stirring the mixture with Et3N in a dark place to obtain yellow powder, washing, drying and dispersing the yellow powder, adding an acetone solution dissolved with [Au2 (PPh2C6H4PPh2) 2] < 2 + >, evaporating and re-dissolving, carrying out gas phase diffusion crystallization by using diethyl ether, standing, collecting bright yellow blocky crystals [Au8 (C2C6H11O) 6 (PPh2C6H4PPh2) 2] (PF6) 2 attached to the inner wall of a container, and drying the bright yellow blocky crystals. A main body material composed of main body materials mCP and OXD-7 is added, and the material is prepared through spin coating and evaporation processes. According to the method for preparing the hybrid white light emission metal complex organic diode, hybrid emission of the main body material and the metal nanoclusters generates bright white light emission, and the hybrid white light emission metal complex organic diode is low in driving voltage and suitable for vehicle-mounted illumination.

Description

Technical Field

[0001] The present invention belongs to the field of automotive electronic device manufacturing, and in particular relates to an organic diode for vehicle-mounted lighting. Background Art

[0002] Automotive lighting systems are crucial to vehicle safety during driving. Most current white-light lighting systems utilize a "UV chip-phosphor" system or a "stacked multi-peak emission" model that employs different light-emitting layers. This undoubtedly imposes significant power consumption on the driver circuits and significantly increases the complexity of device fabrication.

[0003] Metal complexes possess excellent optical properties, including high photoluminescence quantum yields, excellent conductivity, and broad-spectrum emission. Their extremely low biotoxicity makes them promising candidates for near-user lighting or display applications. Furthermore, metal complexes possess sufficiently large absorption cross-sections, which, combined with their high quantum yields, enable high-intensity luminescence. The hybridization of inorganic metal cores with organic ligands allows for processing in common organic solvents, further simplifying process costs and improving raw material utilization.

[0004] Therefore, how to simplify the device manufacturing process and prepare low-power, high-brightness white light-emitting devices in a single emission layer has become an urgent problem to be solved in the field. Summary of the Invention

[0005] The present invention provides an organic diode for vehicle-mounted lighting, aiming to simplify the device manufacturing process and prepare a low-power, high-brightness white light emitting device in a single emission layer.

[0006] The technical solution adopted by the present invention is obtained by the following steps: Step 1: Take 14.9~15.1ml of acetone containing Au(tht)Cl, mix it with 2.9~3.1ml of acetone containing HC2R and quickly add Et3N dropwise, where R=C6H 11 O, stir in the dark for 29-31 minutes; Step 2: Filter the solution obtained in step 1 and then rotary evaporate it, wash it with a mixture of ethanol and water and n-hexane three times respectively, and dry it in a vacuum oven to obtain a bright yellow powder; Step 3: Collect the bright yellow powder obtained in step 2 and disperse it in 7.9~8.1ml of chromatographically pure dichloromethane, add [Au2(PPh2C6H4PPh2)2] 2+ Add 4.9-5.1 ml of acetone solution and stir in the dark for 8-9 hours to obtain an orange-yellow solution; Step 4: The orange-yellow solution obtained in step 3 was filtered, rotary evaporated, and redissolved with a mixture of acetone and ethanol. The solution was crystallized by vapor diffusion method with ether at a temperature of 4.9-5.1°C. After standing for 72-80 hours, bright yellow block crystals were obtained, i.e., the purified [Au8(C2C6H 11 O)6(PPh2C6H4PPh2)2](PF6)2; Step 5: Dissolve the crystals obtained in step 4 in 0.9-1.1 ml of chromatographically pure dichloromethane, add powdered host material mCP and OXD-7 to the solution, and stir vigorously for 5-6 minutes to obtain a uniform pre-spin coating mixed solution; Step 6: Preliminary preparation of hybrid white light emitting metal complex organic diodes for vehicle lighting: The ITO conductive glass was cleaned with soap, deionized water, ethanol, chloroform, acetone, and isopropyl alcohol in sequence, and then treated with UV-ozone. A PEDOT:PSS solution (Baytron PVP Al 4083) was spin-coated onto the treated ITO conductive glass through a filter head, followed by annealing to form a hole injection layer. The substrate was then transferred to a glove box filled with N2 gas. Spin-coat the pre-spin-coated mixed solution prepared in step 5 onto the PEDOT:PSS layer as the light-emitting layer; In step 7, the product obtained in step 6 is finally transferred into a vacuum chamber, and CN-T2T, LiF, and Al layers are sequentially deposited by thermal evaporation, wherein the PO-T2T layer serves as an electron transport layer and a hole blocking layer, and the LiF and Al layers serve as top electrodes; thus, a hybrid white light-emitting metal complex organic diode for automotive lighting is obtained.

[0007] Preferably, in step 1, the mass of Au(tht)Cl is 99-101 mg, and HC2R (R=C6H 11 The mass of the molten-O) was 49-50 mg, the volume of the Et3N solution was 49-51 μL, and the average speed of the magnetic stirring table was 790-810 rpm.

[0008] Preferably, in step 2, the ratio of ethanol to water in the mixture of ethanol and water is 1:3, the amount used each time is 8-9 ml, and the number of washings is 3 times; the amount of n-hexane used each time is 8-9 ml, and the number of washings is 3 times.

[0009] Preferably, in step 3, the mass of the bright yellow powder is 95-97 mg, [Au2(PPh2C6H4PPh2)2] 2+The concentration is 13.3~13.5mg / ml, and the average speed of the magnetic stirring table is 790~810r / min.

[0010] Preferably, in step 4, the volume ratio of acetone to ethanol in the mixed solution of acetone and ethanol is 5:1, and the volume of ether used is not less than 2 / 3 of the volume of the mixed solution of acetone and ethanol.

[0011] Preferably, in step 5, the volume of chromatographically pure dichloromethane in the pre-spin coating mixed solution is 0.95-1.05 ml, and the dissolved [Au8(C2C6H 11 The masses of [O)6(PPh2C6H4PPh2)2](PF6)2 and the main materials mCP, OXD-7 are 4.9~5.1mg, 3.9~4.1mg and 3.9~4.1mg, respectively.

[0012] Preferably, in step 6, the spin coating of PEDOT: PSS is performed at a speed of 1900-2100 r / min for 29-31 s, and the pre-spin coating mixed solution is spin coated on the PEDOT: PSS layer at a speed of 900-1100 r / min for 19-21 s.

[0013] Preferably, in step 6, the annealing treatment of the PEDOT:PSS is specifically annealing at a temperature of 169-171° C. for 29-31 minutes.

[0014] Preferably, in step 7, the evaporation rate of PO-T2T and LiF is 0.10-0.15 nm / s, the final thickness of PO-T2T is 37-38 nm, and the final thickness of LiF is 1-1.2 nm; the evaporation rate of Al is 1-2 nm / s, and the final thickness is 100-150 nm.

[0015] The advantage of the present invention is a method for constructing a hybrid white light emitting metal complex organic diode using a metal complex and an organic molecule mCP, OXD-7. The organic molecules transfer energy to the metal complex while maintaining low roughness on the surface of the film. The hybrid emission of the main material and the metal nanoclusters produces bright white light emission, and the low driving voltage is suitable for vehicle lighting. Furthermore, by adjusting the concentrations of the organic molecules and the metal complex, a wide-spectrum white light emitting organic diode with an electroluminescence spectrum located in the white light region of the International Commission on Illumination chromaticity coordinate diagram was prepared: the white light emission spectrum consists of two sub-peaks, which come from the luminescence of the metal complex itself and the complex formed by the organic molecules and the electron transport layer material. At the same time, the rationality of the device barrier structure makes the turn-on voltage of the device low. After measuring the brightness-time decay curve, the device has good stability, and the maximum brightness reaches 17398 cd / m 2The maximum external quantum efficiency reaches 2.59%, which can be used in automotive lighting related applications. Its low power consumption and high brightness make it a product with great application prospects in future automotive lighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is [Au8(C2C6H 11 O)6(PPh2C6H4PPh2)2](PF6)2 crystal photoluminescence spectrum and optical photograph; Figure 2 is the electroluminescence spectrum of the hybrid white light emitting metal complex organic diode; Figure 3 is the CIE color coordinate diagram of hybrid white light emitting metal complex organic diode; Figure 4 are the two-dimensional and three-dimensional atomic force microscopy images of the hybrid film; Figure 5 This is a schematic diagram of the structure and energy levels of a hybrid white-light-emitting metal complex organic diode; Figure 6 is the current-voltage-luminance curve of the hybrid white light-emitting metal complex organic diode; Figure 7 This is a graph showing the external quantum efficiency, current efficiency, power efficiency and brightness of hybrid white light emitting metal complex organic diodes; Figure 8 This is the brightness decay curve of the hybrid white light emitting metal complex organic diode. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Example 1

[0018] The present invention is prepared by the following method, comprising the following steps: Step 1: Take 14.9 ml of acetone containing 99 mg of Au(tht)Cl and 49 mg of HC2R (R = C6H 11 0) and 2.9 ml of acetone were mixed and 49 μL of Et3N was quickly added dropwise. The mixture was stirred in the dark at 790 r / min on a magnetic stirring table for 29 min; Step 2: Filter the solution obtained in step 1 and perform rotary evaporation, wash it three times with a mixture of ethanol and water (the ratio of ethanol to water in the mixture of ethanol and water is 1:3, and the amount used each time is 8 ml), and then wash it three times with n-hexane (the amount used each time is 8 ml), and dry it in a vacuum oven to obtain a bright yellow powder; Step 3: 95 mg of the bright yellow powder obtained in step 2 was dispersed in 7.9 ml of chromatographically pure dichloromethane, and [Au2(PPh2C6H4PPh2)2] was added at a concentration of 13.3 mg / ml. 2+ 4.9 ml of acetone solution was added, and the mixture was stirred in the dark at 790 r / min on a magnetic stirring table for 8 h to obtain an orange-yellow solution; Step 4: Filter the orange-yellow solution obtained in step 3, and after rotary evaporation, add a mixture of acetone and ethanol dropwise to the container to redissolve it, wherein the volume ratio of acetone to ethanol in the mixed solution of acetone and ethanol is 5:1, and perform vapor diffusion crystallization with ether at a temperature of 4.9°C, wherein the volume of ether is not less than 2 / 3 of the volume of the mixed solution of acetone and ethanol, and after standing for 72 hours, obtain bright yellow block crystals, i.e., the purified [Au8(C2C6H 11 O)6(PPh2C6H4PPh2)2](PF6)2; Step 5: Dissolve 4.9 mg of the crystals obtained in Step 4 in 0.95 ml of chromatographically pure dichloromethane, and add 3.9 mg each of powdered 1,3-bis(9-carbazolyl)benzene (mCP) and 2,2'-(1,3-Phenylene)-bis[5-(4-tert-butylphenyl)-1,3,4-oxadiazole] (OXD-7) to the solution. Stir vigorously for 4.5 minutes to obtain a uniform pre-spin coating mixed solution. Step 6: Preliminary preparation of hybrid white light emitting metal complex organic diodes for vehicle lighting: The ITO conductive glass was cleaned with soap, deionized water, ethanol, chloroform, acetone, and isopropyl alcohol in sequence, and then treated with UV-ozone. A PEDOT:PSS solution (Baytron PVP Al 4083) was spin-coated onto the treated ITO glass through a filter at a speed of 1900 rpm for 29 seconds, followed by annealing to form a hole injection layer. The substrate was then transferred to a glove box filled with N2 gas. Spin-coat the pre-spin-coated mixed solution prepared in step 5 onto the PEDOT:PSS layer as the light-emitting layer at a spin-coating speed of 900 rpm for 19 s. The annealing treatment of the PEDOT:PSS is specifically annealing at a temperature of 169°C for 29 minutes; Step 7: The product obtained in step 6 is finally transferred into a vacuum chamber, and CN-T2T, LiF and Al layers are sequentially deposited by thermal evaporation, wherein the PO-T2T layer serves as an electron transport layer and a hole blocking layer, the evaporation rate is 0.10 nm / s, and the final thickness is 37 nm. The LiF and Al layers serve as top electrodes, wherein the evaporation rate of LiF is 0.10 m / s, and the final thickness of LiF is 1.1 nm; the evaporation rate of Al is 1 nm / s, and the final thickness is 100 nm, thereby obtaining a hybrid white light-emitting metal complex organic diode for automotive lighting. Example 2

[0019] The present invention is prepared by the following method, comprising the following steps: Step 1: Take 15.0 ml of acetone containing 100 mg of Au(tht)Cl and mix with 49.5 mg of HC2R (R=C6H 11 0) and 3.0 ml of acetone were mixed and 50 μL of Et3N was quickly added dropwise. The mixture was stirred at 800 r / min on a magnetic stirring table in the dark for 30 min; Step 2: Filter the solution obtained in step 1 and perform rotary evaporation, wash three times with a mixture of ethanol and water (the ratio of ethanol to water in the mixture of ethanol and water is 1:3, and the amount used each time is 8.5 ml), and then wash three times with n-hexane (the amount used each time is 8.5 ml), and place in a vacuum oven to dry to obtain a bright yellow powder; Step 3: 96 mg of the bright yellow powder obtained in step 2 was dispersed in 8.0 ml of chromatographically pure dichloromethane, and [Au2(PPh2C6H4PPh2)2] was added at a concentration of 13.4 mg / ml. 2+ 5.0 ml of acetone solution was added, and the mixture was stirred in the dark at 800 r / min on a magnetic stirring table for 8.5 h to obtain an orange-yellow solution; Step 4: Filter the orange-yellow solution obtained in step 3, and after rotary evaporation, add a mixture of acetone and ethanol dropwise to the container to redissolve it, wherein the volume ratio of acetone to ethanol in the mixed solution of acetone and ethanol is 5:1, and perform vapor diffusion crystallization with ether at a temperature of 5.0°C, wherein the volume of ether is not less than 2 / 3 of the volume of the mixed solution of acetone and ethanol, and after standing for 76 hours, obtain bright yellow block crystals, i.e., the purified [Au8(C2C6H 11 O)6(PPh2C6H4PPh2)2](PF6)2; Step 5: Dissolve 5.0 mg of the crystals obtained in step 4 in 1.00 ml of chromatographically pure dichloromethane, add 4.0 mg each of powdered mCP and OXD-7 organic molecules, and stir vigorously for 5.0 minutes to obtain a uniform pre-spin coating mixed solution. Step 6: Preliminary preparation of hybrid white light emitting metal complex organic diodes for vehicle lighting: The ITO conductive glass was cleaned with soap, deionized water, ethanol, chloroform, acetone, and isopropyl alcohol in sequence, and then treated with UV-ozone. A PEDOT:PSS solution (Baytron PVP Al 4083) was spin-coated onto the treated ITO glass through a filter at 2000 rpm for 30 seconds, followed by annealing to form a hole injection layer. The substrate was then transferred to a glove box filled with N2 gas. Spin-coat the pre-spin-coated mixed solution prepared in step 5 onto the PEDOT:PSS layer as the light-emitting layer at a spin-coating speed of 1000 rpm for 20 s. The annealing treatment of PEDOT:PSS is specifically annealing at a temperature of 170°C for 30 minutes. Step 7: The product obtained in step 6 is finally transferred into a vacuum chamber, and CN-T2T, LiF and Al layers are sequentially deposited by thermal evaporation, wherein the PO-T2T layer serves as an electron transport layer and a hole blocking layer, the evaporation rate is 0.12 nm / s, and the final thickness is 37.5 nm. The LiF and Al layers serve as top electrodes, wherein the evaporation rate of LiF is 0.12 nm / s, and the final thickness of LiF is 1.15 nm; the evaporation rate of Al is 1.5 nm / s, and the final thickness is 125 nm, thereby obtaining a hybrid white light-emitting metal complex organic diode for automotive lighting. Example 3

[0020] The present invention is prepared by the following method, comprising the following steps: Step 1: Take 15.1 ml of acetone containing 101 mg of Au(tht)Cl and mix with 50.0 mg of HC2R (R=C6H 11 0) and 3.1 ml of acetone were mixed and 51 μL of Et3N was quickly added dropwise. The mixture was stirred in the dark at 810 r / min on a magnetic stirring table for 31 min; Step 2: Filter the solution obtained in step 1 and perform rotary evaporation, wash three times with a mixture of ethanol and water (the ratio of ethanol to water in the mixture of ethanol and water is 1:3, and the amount used each time is 9 ml), and then wash three times with n-hexane (the amount used each time is 9 ml), and place in a vacuum oven to dry to obtain a bright yellow powder; Step 3: Take 7 mg of the bright yellow powder obtained in step 2 and disperse it in 8.1 ml of chromatographically pure dichloromethane, and add [Au2(PPh2C6H4PPh2)2] 2+ 5.1 ml of acetone solution was added, and the mixture was stirred in the dark at 810 r / min on a magnetic stirring table for 9 h to obtain an orange-yellow solution; Step 4: Filter the orange-yellow solution obtained in step 3, and after rotary evaporation, add a mixture of acetone and ethanol dropwise to the container to redissolve it, wherein the volume ratio of acetone to ethanol in the mixed solution of acetone and ethanol is 5:1, and perform vapor diffusion crystallization with ether at a temperature of 5.1°C, wherein the volume of ether is not less than 2 / 3 of the volume of the mixed solution of acetone and ethanol, and after standing for 80 hours, obtain bright yellow block crystals, i.e., the purified [Au8(C2C6H 11 O)6(PPh2C6H4PPh2)2](PF6)2; Step 5: Dissolve 5.1 mg of the crystals obtained in step 4 in 0.95-1.05 ml of chromatographically pure dichloromethane, add 4.1 mg each of powdered mCP and OXD-7 organic molecules, and stir vigorously for 5.5 minutes to obtain a uniform pre-spin coating mixed solution. Step 6: Preliminary preparation of hybrid white light emitting metal complex organic diodes for vehicle lighting: The ITO conductive glass was cleaned with soap, deionized water, ethanol, chloroform, acetone, and isopropyl alcohol in sequence, and then treated with UV-ozone. A PEDOT:PSS solution (Baytron PVP Al 4083) was spin-coated onto the treated ITO glass through a filter at 2100 rpm for 31 seconds, followed by annealing to form a hole injection layer. The substrate was then transferred to a glove box filled with N2 gas. Spin-coat the pre-spin-coated mixed solution prepared in step 5 onto the PEDOT:PSS layer as the light-emitting layer at a spin-coating speed of 1100 rpm for 21 s. The annealing treatment of the PEDOT:PSS is specifically annealing at a temperature of 171°C for 31 minutes; Step 7: The product obtained in step 6 is finally transferred into a vacuum chamber, and CN-T2T, LiF and Al layers are sequentially deposited by thermal evaporation, wherein the PO-T2T layer serves as an electron transport layer and a hole blocking layer, the evaporation rate is 0.15 nm / s, and the final thickness is 38 nm. The LiF and Al layers serve as top electrodes, wherein the evaporation rate of LiF is 0.15 nm / s, and the final thickness of LiF is 1.2 nm; the evaporation rate of Al is 2 nm / s, and the final thickness is 150 nm, thereby obtaining a hybrid white light-emitting metal complex organic diode for automotive lighting.

[0021] like Figure 1 As shown in Figure 3, the synthesized crystals have a regular and orderly crystal structure and are basically consistent with the reference photoluminescence spectrum of the metal complex, ensuring the purity of the synthesized material. Figure 2 As shown in the figure, the electroluminescence of the device shows a broad spectrum emission. After peak fitting, it is obvious that the broad spectrum is composed of two sub-emission peaks. The integral area reflects the respective contributions of the two peaks to the device light power. After integral calculation, the area ratio is about 4:13.3. The yellow electroluminescence peak is centered at 560nm, which is the electroluminescence of the metal complex. The sky blue electroluminescence peak is centered at 471nm, which can be attributed to the interface complex formed by the organic molecule mCP and the electron transport layer PO-T2T. Figure 3 As shown in the figure, the International Commission on Illumination chromaticity coordinates corresponding to the stable electroluminescence spectrum of the electroluminescent device under the maximum brightness voltage are respectively shown. The electroluminescence spectrum of the device is in the white light region, and the CIE coordinates are (0.295, 0.327). Figure 4 As shown, the unoptimized metal complex film has a high roughness, while the roughness of the metal cluster film after optimization of the doped organic molecular material system is significantly reduced (HOMO) energy level and the lowest unoccupied molecular orbital (LUMO) energy level, and a reasonable device structure is designed based on this value, in which the energy level of the metal complex is determined by ultraviolet photoelectron spectroscopy.

[0022] Furthermore, if Figure 6 As shown in the figure, the brightness-voltage-current density curve of the hybrid white light emitting metal complex organic diode is shown; Figure 7 As shown in the figure, the relationship between the external quantum efficiency, current efficiency, power efficiency and brightness of hybrid white light emitting metal complex organic diodes is demonstrated. Figure 8 As shown in the figure, the unpackaged device has a 50cd / m 2 The brightness-time decay curve under brightness is used to evaluate the stability of the device.

[0023] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An organic diode for vehicle lighting, characterized in that: It is obtained by the following steps: Step 1: Take 14.9~15.1ml of acetone containing Au(tht)Cl, mix it with 2.9~3.1ml of acetone containing HC2R and quickly add Et3N dropwise, where R=C6H 11 O, stir in the dark for 29-31 minutes; Step 2: Filter the solution obtained in step 1 and then perform rotary evaporation, wash three times with a mixture of ethanol and water and n-hexane, and dry in a vacuum oven to obtain a bright yellow powder; Step 3: Collect the bright yellow powder obtained in step 2 and disperse it in 7.9~8.1ml of chromatographically pure dichloromethane, add [Au2(PPh2C6H4PPh2)2] 2+ Add 4.9-5.1 ml of acetone solution and stir in the dark for 8-9 hours to obtain an orange-yellow solution; Step 4: The orange-yellow solution obtained in step 3 was filtered, rotary evaporated, and redissolved with a mixture of acetone and ethanol. The solution was crystallized by vapor diffusion method with ether at a temperature of 4.9-5.1°C. After standing for 72-80 hours, bright yellow block crystals were obtained, i.e., the purified [Au8(C2C6H 11 O)6(PPh2C6H4PPh2)2](PF6)2; Step 5: Dissolve the crystals obtained in step 4 in 0.9-1.1 ml of chromatographically pure dichloromethane, add powdered host material mCP and OXD-7 to the solution, and stir vigorously for 5-6 minutes to obtain a uniform pre-spin coating mixed solution; Step 6: Preliminary preparation of hybrid white light emitting metal complex organic diodes for vehicle lighting: The ITO conductive glass was cleaned with soap, deionized water, ethanol, chloroform, acetone, and isopropyl alcohol in sequence, and then treated with UV-ozone. The PEDOT:PSS solution was spin-coated on the treated ITO conductive glass through a filter head, and then annealed to obtain a hole injection layer; The substrate was then transferred into a glove box filled with N2 gas; Spin-coat the pre-spin-coated mixed solution prepared in step 5 onto the PEDOT:PSS layer as the light-emitting layer; In step 7, the product obtained in step 6 is finally transferred into a vacuum chamber, and CN-T2T, LiF, and Al layers are sequentially deposited by thermal evaporation, wherein the PO-T2T layer serves as an electron transport layer and a hole blocking layer, and the LiF and Al layers serve as top electrodes; thus, a hybrid white light-emitting metal complex organic diode for automotive lighting is obtained.

2. The organic diode for vehicle lighting according to claim 1, characterized in that: The mass of Au(tht)Cl in step 1 is 99~101 mg, HC2R (R=C6H 11 The mass of the molten-O) was 49-50 mg, the volume of the Et3N solution was 49-51 μL, and the average speed of the magnetic stirring table was 790-810 rpm.

3. The organic diode for vehicle lighting according to claim 1, characterized in that: In step 2, the ratio of ethanol to water in the mixture of ethanol and water is 1:3, the amount used each time is 8-9 ml, and the number of washings is 3 times; the amount of n-hexane used each time is 8-9 ml, and the number of washings is 3 times.

4. The organic diode for vehicle lighting according to claim 1, characterized in that: In step 3, the mass of the bright yellow powder is 95~97 mg, [Au2(PPh2C6H4PPh2)2] 2+ The concentration is 13.3~13.4mg / ml, and the average speed of the magnetic stirring table is 790~810r / min.

5. The organic diode for vehicle lighting according to claim 1, characterized in that: In step 4, the volume ratio of acetone to ethanol in the mixed solution of acetone and ethanol is 5:1, and the volume of ether used is not less than 2 / 3 of the volume of the mixed solution of acetone and ethanol.

6. The organic diode for vehicle lighting according to claim 1, characterized in that: In step 5, the volume of chromatographically pure dichloromethane in the pre-spin coating mixed solution is 0.95-1.05 ml, and the dissolved [Au8(C2C6H 11 The masses of [O)6(PPh2C6H4PPh2)2](PF6)2 and the main materials mCP, OXD-7 are 4.9~5.1mg, 3.9~4.1mg and 3.9~4.1mg, respectively.

7. The organic diode for vehicle lighting according to claim 1, characterized in that: In step 6, the spin coating of PEDOT: PSS is performed at a speed of 1900-2100 r / min for 29-31 s, and the pre-spin coating mixed solution is spin coated on the PEDOT: PSS layer at a speed of 900-1100 r / min for 19-21 s.

8. The organic diode for vehicle lighting according to claim 1, characterized in that: In step 6, the PEDOT:PSS is annealed at a temperature of 169-171° C. for 29-31 minutes.

9. The organic diode for vehicle lighting according to claim 1, characterized in that: In step 7, the evaporation rate of PO-T2T and LiF is 0.10-0.15 nm / s, the final thickness of PO-T2T is 37-38 nm, and the final thickness of LiF is 1-1.2 nm; the evaporation rate of Al is 1-2 nm / s, and the final thickness is 100-150 nm.

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