Method for orienting cyanobiphenyl liquid crystals doped with organic donor materials and applications

Abstract

The present disclosure provides an alignment method of a cyanophenyl liquid crystal composite doped with an organic donor material and applications thereof, wherein an organic small molecule is doped in a main cyanophenyl liquid crystal, and a small molecule donor / cyanophenyl liquid crystal mixture is subjected to directional induction assembly by means of a large surface energy difference between a super-hydrophobic structured shape substrate and a super-hydrophilic substrate. Liquid crystal molecules form a uniform arrangement under the action of liquid bridges, and drive the small molecule donor to embed in the cyanophenyl liquid crystal after self-assembly, forming an electron donor-donor structure, and enhancing the conductivity of the liquid crystal composite device. Compared with the alignment method of liquid crystal molecules and donor small molecules by using electric field, magnetic field, photolithography, capillary method and the like, the method is more simple and feasible, easy to transfer, has a good circuit pattern design, and has good stability.

Description

Technical Field

[0001] This disclosure relates to the field of liquid crystal materials and charge transport, and in particular to an orientation method for cyanobiphenyl liquid crystals doped with organic small molecule donor materials and its application. Background Technology

[0002] The ease of alignment of liquid crystals is the main reason and prerequisite for their application. Alignment methods for rod-shaped liquid crystals are becoming increasingly mature, especially the rubbing alignment method, which has been successfully applied to commercial liquid crystal displays. Simultaneously, due to the low viscosity and high dielectric constant of rod-shaped liquid crystals, their molecular alignment direction can be easily controlled by low-intensity electromagnetic fields, making large-area uniform alignment relatively easy to achieve. Traditional alignment methods can align molecules in one direction, but cannot achieve patterned molecular arrangement, thus failing to meet the application requirements of some novel devices. In recent years, with the development of some new micro-nano technologies, patterned alignment of rod-shaped liquid crystals has unique application prospects in the fabrication of optical microlenses, optical eddy current gratings, and organic optoelectronics. Compared to inorganic materials, liquid crystal materials have advantages such as low cost, low toxicity, ease of processing and molding, and the ability to be fabricated into fully flexible devices.

[0003] As a prominent representative of rod-shaped liquid crystals, cyanobiphenyl liquid crystals have sparked a surge of interest in fabricating patterned liquid crystal organic optoelectronic devices due to their excellent electron transport capabilities. These methods include printing, nano-template methods, and microchannel methods. While these methods can achieve highly regular periodic patterns, the types of patterns produced are limited, the microstructure of the liquid crystal is difficult to control, large-area uniform orientation is difficult to achieve, and the substrate dependence on the microstructure is difficult to transfer, thus limiting the conductivity and further applications of cyanobiphenyl liquid crystals. Organic small molecule materials have advantages such as well-defined structures and ease of adjustment, coupled with their excellent optoelectronic properties. Incorporating them into liquid crystals, such as adding organic small molecule donor materials to the electron acceptor cyanobiphenyl liquid crystal, forms a cyanobiphenyl liquid crystal charge transfer complex. Orienting this complex can significantly improve the optoelectronic performance of the cyanobiphenyl liquid crystal. Currently, there are few reports on orientation methods for cyanobiphenyl liquid crystals doped with organic small molecule donor materials, both domestically and internationally, and most of them employ extremely complex orientation processes. Therefore, the development of cyanobiphenyl liquid crystals using simple and efficient methods to obtain large-area, uniformly oriented doped organic small molecule donor materials, forming electron donor-donor charge transfer complexes, and greatly improving the photoelectric properties of cyanobiphenyl liquid crystals is an urgent need in this field. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing an orientation method for cyanobiphenyl liquid crystals doped with organic small molecule donor materials and its applications. The preparation method is simple, the patterns are customizable and easily transferred, and it simultaneously optimizes the performance of liquid crystal optoelectronic devices.

[0005] The technical solution adopted in this disclosure is:

[0006] An orientation method for a cyanobiphenyl liquid crystal composite doped with an organic donor material, the orientation method comprising the following steps:

[0007] Based on the shape of the organic donor material / cyanobiphenyl liquid crystal structured pattern to be prepared, a shape template for the organic donor material / cyanobiphenyl liquid crystal structured pattern is prepared;

[0008] Superhydrophobic modification of the shape template of the organic donor material / cyanobiphenyl liquid crystal structured pattern;

[0009] Prepare a homogeneous organic dispersion solution of cyanobiphenyl liquid crystal with a certain concentration of doped organic donor material;

[0010] Select the upper substrate and modify it with superhydrophilicity;

[0011] The organic dispersion is dropped into the space between the upper substrate and the shape template of the organic donor material / cyanobiphenyl liquid crystal structured pattern;

[0012] The organic dispersion evaporates and shrinks at a suitable temperature, and is deposited on the upper substrate to form an oriented organic donor material / cyanobiphenyl liquid crystal composite structured pattern.

[0013] Optionally, a stripping step is also included to peel the upper substrate of the oriented deposited organic donor material / cyanobiphenyl liquid crystal from the silicon substrate to obtain a shape-controllable organic donor material / cyanobiphenyl liquid crystal structured pattern.

[0014] Optionally, the organic donor material includes OXD-7 or BTBP.

[0015] Optionally, the cyanobiphenyl liquid crystal includes 8OCB, 7OCB, or 9OCB.

[0016] Optionally, the solvent of the dispersion solution includes chlorobenzene or toluene.

[0017] Optionally, the organic donor material accounts for 30%-50% of the mass of the liquid crystal composite. Optionally, the shape template of the organic donor material / cyanobiphenyl liquid crystal structured pattern is designed according to the required circuit pattern.

[0018] Optionally, the suitable temperature is 70℃-90℃.

[0019] The present invention also proposes a cyanobiphenyl liquid crystal composite doped with an organic small molecule donor material, wherein the cyanobiphenyl liquid crystal doped with the organic small molecule donor material is prepared by the preparation method proposed in the present invention.

[0020] The present invention also proposes a fluorescent or electrical element comprising a cyanobiphenyl liquid crystal composite doped with an organic small molecule donor material.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] (1) The present invention provides an orientation method for cyanobiphenyl liquid crystal doped with organic small molecule donor material. The orientation method is simple and low cost.

[0023] (2) The present invention provides an orientation method for cyanobiphenyl liquid crystal doped with organic small molecule donor material. Depending on the different needs of actual applications, the pattern of the photomask can be adjusted to change the pattern of the silicon substrate to meet the needs of fluorescence or electrical applications.

[0024] (3) This invention studies the process parameters in the orientation method of cyanobiphenyl liquid crystal composites doped with organic small molecule donor materials, and obtains composites with excellent electrical properties to meet application requirements.

[0025] (4) A cyanobiphenyl liquid crystal doped with organic small molecule donor material was used as a material for optoelectronic applications. This type of material has excellent optoelectronic properties and can greatly improve the application range of liquid crystal elements. Attached Figure Description

[0026] Figure 1 Optical photographs, polarizing microscope photographs, polarizing microscope photographs with light compensation plates, and XRD patterns of the OXD-7 / 8OCB small molecule donor / liquid crystal composite after orientation in Example 1 of this disclosure.

[0027] Figure 2 This diagram illustrates the application of a gold film to the electrical applications of the OXD-7 / 8OCB small molecule donor / liquid crystal composite after orientation, as shown in Example 1 of this disclosure, and the possible molecular arrangement in the micrometer wires of the oriented composite.

[0028] Figure 3 This is a comparison diagram of the current density passing through the OXD-7 / 8OCB small molecule donor / liquid crystal composite after orientation in Example 1 of this disclosure, the 8OCB-oriented microwire, and the unoriented film.

[0029] Figure 4 This diagram illustrates the effect of different heating temperatures on the electrical properties of the OXD-7 / 8OCB small molecule donor / liquid crystal composite after orientation.

[0030] Figure 5 This is a schematic diagram of the electrical properties of liquid crystal composite films and microwires with different contents of small molecule OXD-7 disclosed in this paper. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this disclosure, the disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this disclosure. Furthermore, the technical features involved in the various embodiments of this disclosure described below can be combined with each other as long as they do not conflict with each other.

[0033] Example 1

[0034] An orientation method for a cyanobiphenyl liquid crystal composite doped with an organic small molecule donor material, wherein the organic small molecule donor in the composite structure is OXD-7 and the cyanobiphenyl liquid crystal is 8OCB.

[0035] The orientation method of the above-mentioned complex includes the following steps:

[0036] (1) Etching of micron-shaped silicon pillar templates: The etched micron-shaped silicon pillar templates are formed on nitrogen-doped silicon pillar templates. <100> A 5-inch diameter, 500-micrometer thick silicon wafer is coated with photoresist. Using a pre-designed chromium-plated (Cr) quartz photoresist plate, a laser direct-write device is used to irradiate and cure the photoresist. After baking and development, the unexposed areas of the silicon wafer surface are exposed. A fluorine-based reagent is used to perform deep reactive ion etching on the silicon wafer with the photoresist pattern for approximately 6 minutes. Finally, the substrate is stripped of the photoresist and cleaned with acetone and ethanol to obtain a micrometer-line silicon pillar template. The micrometer-line silicon pillars are 1 cm long, 2 micrometers wide, and 20 micrometers high, with a 5-micrometer spacing between the patterns.

[0037] (2) Superhydrophobic modification of micron-shaped silicon pillars: Before modification, the micron-shaped silicon pillar template needs to be cleaned with ethanol and acetone. The silicon pillar template is treated with a low-temperature plasma treatment instrument (oxygen atmosphere, discharge power of 200W, treatment time of 300s) to activate its surface. Then, it is placed in a vacuum oven, and 5μl of octadecylfluorosilane is added. The vacuum environment is maintained at 80℃ for 12 hours to obtain a micron-shaped silicon pillar template with a superhydrophobic surface. The water contact angle can reach about 150°.

[0038] (3) Preparation of chlorobenzene solution of small molecule donor OXD-7 and liquid crystal 8OCB mixture: OXD-7 and 8OCB were separately dispersed in chlorobenzene by ultrasonication, and the concentration of the solutions was 2.5 mg / mL, ranging from 0.25 to 10 mg / mL. The chlorobenzene solutions of OXD-7 and 8OCB were mixed together at a volume ratio of 3:7 and ultrasonicated to form a homogeneous solution. At this time, the mass ratio of small molecule OXD-7 to 8OCB was 3:7.

[0039] (4) The orientation donor small molecule OXD-7 and the liquid crystal 8OCB complex were combined to form a micron-shaped linear pattern on the SiO2@Si silicon wafer: The SiO2@Si silicon wafer was treated with superhydrophilic treatment using a low-temperature plasma treatment instrument (oxygen atmosphere, discharge power of 200W, treatment time of 300s). After treatment, the SiO2@Si silicon wafer became superhydrophilic with a water contact angle of 0°. 10 μl of OXD-7 / 8OCB chlorobenzene solution was added dropwise between the superhydrophobic micron-shaped silicon pillar template and the superhydrophilic SiO2@Si silicon wafer to form a "sandwich" structure. The lower substrate is the superhydrophobic micron-shaped silicon pillar template, the upper substrate is the superhydrophilic SiO2@Si silicon wafer, and the middle is the OXD-7 / 8OCB chlorobenzene solution. After being placed in a medium vacuum drying oven at 80℃ for 48 hours, the vacuum drying oven was closed, and the sample was taken out after the drying oven cooled naturally to room temperature. The large surface energy difference between the silicon substrate and the super-hydrophilic horizontally aligned substrate allows the homogeneous solution to form micron-sized liquid bridges at the interface between the two substrates, inducing the directional assembly of OXD-7 / 8OCB quantum dots. The liquid bridges deflect the 8OCB molecules, resulting in a uniform alignment that drives the orientation of small OXD-7 molecules, forming charge-transfer complexes with the 8OCB. Simultaneously, due to the anchoring effect of the micron-shaped silicon substrate, a micron-shaped OXD-7 / 8OCB composite structure identical to that of the silicon substrate is formed on the upper substrate.

[0040] like Figure 1 As shown, the polarized light micrograph (ae) and XRD pattern (f) of the oriented OXD-7 / 8OCB micrometer lines are displayed; among them, Figure 1 (a) is an optical micrograph of micrometer lines; Figure 1 (b) and Figure 1 (c) Polarized light micrographs showing the micrometer line at +45° and 0° angles to the polarizer, respectively; Figure 1 (d) Figure 1 (e) Microscopic images showing the micrometer lines at +45° and -45° angles to the polarizer after the addition of an optical compensation plate; Figure 1 (f) shows the XRD pattern of the micrometer wire.

[0041] Electrical applications of the above-mentioned OXD-7 / 8OCB complex after orientation:

[0042] The conductivity of the OXD-7 / 8OCB composite after orientation was studied using a semiconductor parameter analyzer with a probe station. Figure 2 As shown, where Figure 2 (a) Schematic diagram of electrode arrangement: A pair of elongated gold electrodes are symmetrically placed on a strip-shaped OXD-7 / 8OCB composite, with a spacing of about 8 micrometers between the electrodes. A metal probe is placed on each of the two electrodes. Figure 2 (b) is a schematic diagram of the complex structure. For example... Figure 3 As shown, when a voltage from -100V to +100V is applied to the aligned liquid crystal composite, the current density increases by 7 orders of magnitude compared to the 8OCB composite film without deflection and patterning, and by 5 orders of magnitude compared to the aligned 8OCB micrometer line, which greatly improves the conductivity of the liquid crystal.

[0043] Optionally, in this embodiment, the micron-line silicon pillar template is a shape template for forming a cyanobiphenyl liquid crystal composite with a doped organic donor material. Based on this shape template, a composite with a corresponding shape is prepared. It is understood that the shape template of the composite can be designed according to the required circuit pattern.

[0044] Example 2

[0045] An orientation method for a cyanobiphenyl liquid crystal composite doped with an organic small molecule donor material, wherein the organic small molecule donor in the composite structure is OXD-7 and the cyanobiphenyl liquid crystal is 8OCB.

[0046] The orientation method of the above-mentioned complex includes the following steps:

[0047] The orientation method and application in this embodiment are the same as in embodiment 1, except that the heating temperature in step (4) is room temperature 25°C.

[0048] Example 3

[0049] An orientation method for a cyanobiphenyl liquid crystal composite doped with an organic small molecule donor material, wherein the organic small molecule donor in the composite structure is OXD-7 and the cyanobiphenyl liquid crystal is 8OCB.

[0050] The orientation method of the above-mentioned complex includes the following steps:

[0051] The orientation method and application in this embodiment are the same as in embodiment 1, except that the heating temperature in step (4) is 40°C.

[0052] Example 4

[0053] An orientation method for a cyanobiphenyl liquid crystal composite doped with an organic small molecule donor material, wherein the organic small molecule donor in the composite structure is OXD-7 and the cyanobiphenyl liquid crystal is 8OCB.

[0054] The orientation method of the above-mentioned complex includes the following steps:

[0055] The orientation method and application in this embodiment are the same as in embodiment 1, except that the heating temperature in step (4) is 60°C.

[0056] Based on the study of heating temperatures, a suitable heating temperature is between room temperature and 100°C in order to achieve the orientation of the composite of the present invention. Example 5

[0057] An orientation method for a cyanobiphenyl liquid crystal composite doped with an organic small molecule donor material, wherein the organic small molecule donor in the composite structure is OXD-7 and the cyanobiphenyl liquid crystal is 8OCB.

[0058] The orientation method of the above-mentioned complex includes the following steps:

[0059] The orientation method and application in this embodiment are the same as in embodiment 1, except that the mass ratio of OXD to 8OCB in step (3) is 2:8.

[0060] Example 6

[0061] An orientation method for a cyanobiphenyl liquid crystal composite doped with an organic small molecule donor material, wherein the organic small molecule donor in the composite structure is OXD-7 and the cyanobiphenyl liquid crystal is 8OCB.

[0062] The orientation method of the above-mentioned complex includes the following steps:

[0063] The orientation method and application in this embodiment are the same as in embodiment 1, except that the mass ratio of OXD-7 to 8OCB in step (3) is 4:6.

[0064] Example 7

[0065] An orientation method for a cyanobiphenyl liquid crystal composite doped with an organic small molecule donor material, wherein the organic small molecule donor in the composite structure is OXD-7 and the cyanobiphenyl liquid crystal is 8OCB.

[0066] The orientation method of the above-mentioned complex includes the following steps:

[0067] The orientation method and application in this embodiment are the same as in Embodiment 1, except that the cyanobiphenyl liquid crystal is replaced with 7OCB instead of 8OCB.

[0068] Example 8

[0069] An orientation method for a cyanobiphenyl liquid crystal composite doped with an organic small molecule donor material, wherein the organic small molecule donor in the composite structure is OXD-7 and the cyanobiphenyl liquid crystal is 8OCB.

[0070] The orientation method of the above-mentioned complex includes the following steps:

[0071] The orientation method and application in this embodiment are the same as in Embodiment 1, except that the cyanobiphenyl liquid crystal is replaced with 9OCB instead of 8OCB.

[0072] Example 9

[0073] An orientation method for a cyanobiphenyl liquid crystal composite doped with an organic small molecule donor material, wherein the organic small molecule donor in the composite structure is OXD-7 and the cyanobiphenyl liquid crystal is 8OCB.

[0074] The orientation method of the above-mentioned complex includes the following steps:

[0075] The orientation method and application in this embodiment are the same as in embodiment 1, except that the organic solution chlorobenzene in step (3) is replaced with toluene.

[0076] The electrical properties of the cyanobiphenyl liquid crystal oriented doped small molecule donor material of the present invention were studied. When the concentration of the OXD-7 / 8OCB mixed organic solution was fixed at 2.5 mg / mL, the heating temperature in step (4) during the preparation process had a significant impact on the micron-line conductivity of the prepared liquid crystal composite. For example... Figure 4 As shown, where, Figure 4 (a) shows the JV curve of the liquid crystal composite micrometer line; Figure 4 (b) The relationship between the current density of each liquid crystal composite micrometer wire when a voltage of -60V is applied and the heating temperature during the alignment process; Figure 4 (c) shows the XRD pattern. For example... Figure 4 As shown, when the heating temperature is 70℃-90℃, the current density through the microwire is increased by three orders of magnitude compared to heating at other temperatures. In particular, at a heating temperature of 80℃, the current density increases by five orders of magnitude. Subsequently, XRD was used to study the liquid crystal properties of the microwires formed at different heating temperatures, yielding the following results: Figure 4(c) shows the XRD pattern. At heating temperatures of 70℃-90℃, a strong diffraction peak appears at 3.7°, corresponding to the (001) plane of 8OCB, indicating that the liquid crystal molecules form a smectic, layered, ordered arrangement, with the 8OCB molecules standing vertically on the upper substrate. The diffraction peak at 6.9° originates from the (200) plane of the small molecule OXD-7, representing the B6 phase arrangement of OXD-7. At 80℃, the uniform arrangement of the liquid crystal and the small molecules forms a good electron donor-acceptor pair, resulting in the highest conductivity of the sample. When the heating temperature is below 70℃ (25℃-60℃), only a strong diffraction peak of 8OCB at 3.7° is observed, indicating that low temperature favors the orientation of the liquid crystal 8OCB. When the temperature exceeds 90℃ (100℃), the small molecule OXD-7 exhibits a strong diffraction peak, while the diffraction peak of 8OCB is significantly weakened. This indicates that high temperature favors the uniform alignment of OXD-7, while the orientation of 8OCB becomes very weak. Correspondingly, when the heating temperature is below 70℃ or above 90℃, the current density of the sample is significantly lower than that at 70℃-90℃. Only when both 8OCB and OXD-7 form a uniform alignment can the conductivity within the sample reach its maximum. A single uniform alignment of 8OCB or OXD-7 has little effect on the conductivity of the liquid crystal composite.

[0077] like Figure 5 As shown, the effect of the mass content of small molecule OXD-7 on the conductivity of the prepared liquid crystal composite microwires was studied. The concentration of the OXD-7 / 8OCB organic mixed solution was fixed at 2.5 mg / mL, and the heating temperature during the orientation process was 80 °C. Figure 5 (a) JV curves of liquid crystal composite films with different OXD-7 contents and micrometer lines; Figure 5 (b) A comparative bar chart showing the current density passing through unoriented OXD-7 / 8OCB films, unoriented 8OCB films, oriented microwires, and liquid crystal composite microwires with OXD-7 content of 30%, 40%, and 50% when a voltage of -60V is applied. Figure 5 (c) The relationship between the current density of each composite liquid crystal micrometer line and the OXD-7 content when a voltage of -60V is applied; Figure 5(d) shows the XRD pattern. As can be seen from the figure, when the mass content of OXD-7 is 30%-50%, the current density passing through the microwire is increased by 3 orders of magnitude compared with other contents. In particular, when the OXD-7 content is 30%, it is increased by nearly 5 orders of magnitude, which greatly improves the conductivity of OXD-7 / 8OCB. The corresponding XRD diffraction pattern shows a strong diffraction peak at 3.7°, which corresponds to the (001) plane of 8OCB, indicating that the liquid crystal molecules have formed a smectic layered ordered arrangement, and 8OCB stands vertically on the upper substrate. The diffraction peak at 6.9° comes from the (200) plane of the small molecule OXD-7, representing that OXD-7 is arranged in the B6 phase. When the OXD-7 content is 30%, the liquid crystal and small molecules are uniformly arranged, forming a good electron donor-acceptor pairing, and the conductivity of the composite microwire is the strongest at this time. When the OXD-7 content is below 30%, the XRD diffraction pattern shows three peaks: a peak near 3.0°, corresponding to the trans-dimer smectic phase (SmAd) of 8OCB; a peak at 3.7°, corresponding to the (001) plane of the layered smectic phase of 8OCB; and a third peak at 6.9°, corresponding to the B6 phase of small molecule OXD-7. The SmAd arrangement of 8OCB is not conducive to the formation of donor-acceptor complexes in composite microwires, thus significantly reducing conductivity. When the OXD-7 content is above 50%, only the B6 phase diffraction peak of OXD-7 appears, and no diffraction peak of 8OCB appears, indicating that 8OCB has not formed an ordered arrangement, hence the conductivity is also low.

[0078] Compared with the prior art, the beneficial effects of this disclosure are as follows:

[0079] (1) The present invention provides an orientation method for cyanobiphenyl liquid crystal doped with small molecule donor material. The orientation method is simple and low cost.

[0080] (2) The present invention provides an orientation method for cyanobiphenyl liquid crystal doped with small molecule donor material. Depending on the different needs of actual applications, the pattern of the photomask can be adjusted to change the pattern of the silicon substrate to meet the needs of fluorescence or electrical applications.

[0081] (3) This invention studies the process parameters in the orientation method of cyanobiphenyl liquid crystal composites doped with organic small molecule donor materials, and obtains composites with excellent electrical properties to meet application requirements.

[0082] (4) A cyanobiphenyl liquid crystal doped with small molecule donor material was used as a material for optoelectronic applications. This type of material has excellent optoelectronic properties and can greatly improve the application range of liquid crystal elements.

[0083] The embodiments described above are merely preferred embodiments of this disclosure. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Various modifications and improvements made to the technical solutions of this disclosure by those skilled in the art without departing from its spirit should fall within the protection scope defined by the claims of this disclosure.

Claims

1. An orientation method for a cyanobiphenyl liquid crystal composite doped with an organic donor material, characterized in that, The orientation method includes the following steps: Based on the shape of the organic donor material / cyanobiphenyl liquid crystal structured pattern to be prepared, a shape template for the organic donor material / cyanobiphenyl liquid crystal structured pattern is prepared; Superhydrophobic modification of the shape template of the organic donor material / cyanobiphenyl liquid crystal structured pattern; Prepare a homogeneous organic dispersion solution of cyanobiphenyl liquid crystal with a certain concentration of doped organic donor material; Select the upper substrate and modify it with superhydrophilicity; The organic dispersion solution is dropped into the space between the upper substrate and the shape template of the organic donor material / cyanobiphenyl liquid crystal structured pattern; The organic dispersion solution evaporates and shrinks at a suitable temperature, depositing on the upper substrate to form an oriented organic donor material / cyanobiphenyl liquid crystal composite structured pattern; wherein... The organic donor material includes OXD-7 or BTBP; the cyanobiphenyl liquid crystal includes 8OCB, 7OCB or 9OCB; The organic donor material accounts for 30%-50% of the mass content of the oriented liquid crystal composite; The suitable temperature is 70℃-90℃.

2. The orientation method for the cyanobiphenyl liquid crystal composite doped with organic donor material according to claim 1, characterized in that: It also includes a stripping step, in which the upper substrate of the oriented deposited organic donor material / cyanobiphenyl liquid crystal composite is stripped from the silicon substrate to obtain a shape-controllable structured pattern of the organic donor material / cyanobiphenyl liquid crystal composite.

3. The orientation method for the cyanobiphenyl liquid crystal composite doped with organic donor material according to claim 1 or 2, characterized in that: The solvent for the dispersion solution includes chlorobenzene or toluene.

4. The orientation method for the cyanobiphenyl liquid crystal composite doped with organic donor material according to claim 1 or 2, characterized in that: The shape template of the organic donor material / cyanobiphenyl liquid crystal structured pattern is designed according to the required circuit diagram.

5. A cyanobiphenyl liquid crystal composite with an oriented doped donor material, characterized in that, The cyanobiphenyl liquid crystal doped with organic donor material is prepared according to any one of claims 1-4.

6. A fluorescent or electrical element, characterized in that, The fluorescent or electrical element comprises a cyanobiphenyl liquid crystal composite with an oriented doped organic donor material as described in claim 5.

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