Organic semi-core-shell heterostructure with visible light-to-near infrared waveguide conversion function and preparation method of organic semi-core-shell heterostructure

Abstract

The invention belongs to the technical field of material preparation and application, and particularly relates to an organic semi-core-shell heterostructure with visible light-to-near infrared waveguide conversion and a preparation method of the organic semi-core-shell heterostructure. The method comprises the following steps: weighing a plurality of organic conjugated molecules, adding a good organic solvent, and carrying out ultrasonic treatment to obtain an organic solvent stock solution; and adding the organic solvent stock solution into a poor organic solvent, uniformly shaking, standing, uniformly mixing, dripping on a substrate, and successfully preparing the organic semi-core-shell heterostructure micro-nano structure material after the organic solvent is volatilized. Spectrum and polarization signals obtained by different output ports of the prepared organic semi-core-shell heterostructure are gathered, and the photon bar code is obtained. The organic semi-core-shell heterostructure is constructed through a two-step seed growth method by adopting a simple, convenient and low-cost solution self-assembly method, the preparation process is simple and rapid, the cost is low, the reaction temperature is mild, and industrial production and application in the field of organic photon information encryption are facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of material preparation and application, and particularly relates to an organic semi-core-shell heterostructure with visible light to near-infrared waveguide conversion and a preparation method thereof. Background Art

[0002] The controllable processing and transmission of photons / electrons at the micro / nano scale have broad application potential in advanced optoelectronics fields such as data storage and information encryption, thus attracting extensive attention. By modulating photon transmission signals (including waveguide mode, intensity, polarization, orientation, and wavelength), effective energy transfer and exciton conversion can be achieved in low-dimensional heterostructures to realize information transfer and transmission. And reasonably integrating near-infrared emitting substances into low-density optical devices is urgent and important to meet the actual needs of the growing photon chips. In recent years, organic semiconductors have great potential in preparing low-dimensional heterostructures for miniaturized integrated circuits due to their designable molecular structures, tunable optical properties, large-scale solution processing, and excellent mechanical flexibility. It is worth noting that organic low-dimensional heterostructures with high spatial accuracy and angular accuracy have a relatively large specific surface area and directional exciton propagation characteristics at the heterojunction, which is beneficial to precisely controlling and manipulating photons at the wavelength scale. In addition, organic charge transfer co-crystals exhibit multi-component synergistic and integrated effects, having great advantages in optoelectronic properties compared with single components, and charge transfer co-crystals with similar components usually have high chemical / structural compatibility, which is conducive to the rational design of various organic low-dimensional heterostructures. Therefore, by purposefully adjusting the state or stacking mode of organic charge transfer co-crystals, tunable near-infrared emission and controllable multi-stage self-assembly can be achieved simultaneously, thus forming an organic low-dimensional heterostructure with near-infrared emission. Summary of the Invention

[0003] In order to solve the above existing technical problems, the present application provides the following technical solutions:

[0004] The present invention proposes a preparation method of an organic semi-core-shell heterostructure with visible light to near-infrared waveguide conversion. By using a simple and low-cost solution self-assembly method, the construction of the organic semi-core-shell heterostructure is realized through a two-step seed growth method. The preparation process is simple and fast, with low cost and mild reaction temperature, which is beneficial to industrial production and application in the field of organic photon information encryption.

[0005] The present invention provides a preparation method of an organic semi-core-shell heterostructure with visible light to near-infrared waveguide conversion, including the following steps:

[0006] S1: Prepare a first organic solvent stock solution and a second organic solvent stock solution respectively; the first organic solvent stock solution is obtained by mixing a donor molecule A and a receptor molecule B in a good organic solvent, and the second organic solvent stock solution is obtained by mixing the donor molecule A and a receptor molecule C in a good organic solvent; the receptor molecule B and the receptor molecule C are different;

[0007] S2: At room temperature (25 ± 5 °C), add a poor solvent to the first organic solvent stock solution and the second organic solvent stock solution respectively, and let it stand to obtain a first solution and a second solution;

[0008] S3: Mix the first solution and the second solution described in step S2, cover them on a substrate, and dry to obtain the organic semi-core-shell heterostructure with visible light to near-infrared waveguide conversion.

[0009] Preferably, in the first organic solvent stock solution and the second organic solvent stock solution, the molar ratio of the donor molecule to the receptor molecule is 1-4:1-4.

[0010] Preferably, in step S1, the mixing method is ultrasonic.

[0011] Preferably, the donor molecule A is selected from dibenzothiophene, benzonaphtho(1,2-d)thiazole, dinaphtho[2,1-b:1’,2’-d]thiophene, perylene benzothiophene, benzo[1,2-b:4,5-b’]dithiophene, dithieno[3,2-b:2’,3’-d]thiophene, naphtho[1,2-b:5,6-b’]dithiophene, benzo[b]benzo[4,5]thieno[2,3-d]thiophene, tetrathiafulvalene, dibenzotetrathiafulvalene, (E)-4,4’-dimethyltetrathiafulvalene, 4,4’,5,5’-tetramethyltetrathiafulvalene, (E)-4,4’-dimethyl-5,5’-diphenyltetrathiafulvalene, and 4,4’,5,5’-tetraphenyltetrathiafulvalene.

[0012] Preferably, the receptor molecule B and the receptor molecule C are independently selected from 1,2,4,5-tetracyanobenzene, 7,7,8,8-tetracyanoquinodimethane, 2-fluoro-7,7,8,8-tetracyanoquinodimethane, 2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane, tetrafluoro-p-benzoquinone, tetrachloro-p-benzoquinone, tetrabromo-p-benzoquinone, tetraiodo-p-benzoquinone, 4,5-difluoro-3,6-tetracyano-p-benzoquinone, 4,5-dichloro-3,6-tetracyano-p-benzoquinone, 11,11,12,12-tetracyanonaphthalene-2,6-quinodimethane, and 1,3,5,7-tetrafluoro-11,11,12,12-tetracyanonaphthalene-2,6-quinodimethane.

[0013] Preferably, the good organic solvent is selected from one or two of dichloromethane, chloroform, acetonitrile, tetrahydrofuran, and chlorobenzene.

[0014] Preferably, in the first organic solvent stock solution or the second organic solvent stock solution, the concentration of the solute is 2 - 10 mmol / L.

[0015] Preferably, the poor solvent is selected from one or two of ethanol, methanol, isopropanol, n - hexane, cyclohexane, and toluene.

[0016] Preferably, in step S2, the standing time is 10 s to 1800 s.

[0017] Preferably, the volume ratio of the first organic solvent stock solution or the second organic solvent stock solution to the poor solvent is 1 - 10:2; when mixing, the volume ratio of the first solution to the second solution is 1 - 10:2.

[0018] The present invention also provides an organic semi - core - shell heterostructure with visible - light - to - near - infrared waveguide conversion prepared by the above - mentioned preparation method.

[0019] The present invention also provides the application of the above - mentioned organic semi - core - shell heterostructure with visible - light - to - near - infrared waveguide conversion in the field of organic photon information encryption.

[0020] The technical solution of the present invention has the following advantages compared with the prior art:

[0021] The preparation method of an organic semi - core - shell heterostructure provided by the present invention effectively avoids complex molecular design and delicate synthesis processes, and has the advantages of simple process, low cost, and simple and efficient operation, showing great potential in basic research and practical applications. A two - step seed - growth method is used to construct an organic core - shell heterostructure with multi - level spatial organization through a simple and rapid solution self - assembly strategy, showing waveguide behavior dependent on the excitation position, and the prepared samples are successfully applied to optical logic gates. Description of the Drawings

[0022] Figure 1 It is the organic molecular structure with π - conjugation in the present invention.

[0023] Figure 2 It is the fluorescence microscope images and bright - field images of dibenzothiophene - 7,7,8,8 - tetracyanoquinodimethane, dibenzothiophene - 2,5 - difluoro - 7,7,8,8 - tetracyanoquinodimethane, and dibenzothiophene - 2,3,5,6 - tetrafluoro - 7,7,8,8 - tetracyanoquinodimethane in the present invention.

[0024] Figure 3Electron spin resonance spectra of dibenzothiophene, dibenzothiophene-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, and dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane in the present invention.

[0025] Figure 4 Fluorescence emission spectra of dibenzothiophene-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, and dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane in the present invention.

[0026] Figure 5 Fluorescence microscope images and fluorescence emission spectra of the organic core-shell heterostructure of dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane-1,2,4,5-tetracyanobenzene in the present invention.

[0027] Figure 6 Transmission electron microscopy images and selected area electron diffraction images of the organic core-shell heterostructure of dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane-1,2,4,5-tetracyanobenzene in the present invention.

[0028] Figure 7 X-ray diffraction patterns of dibenzothiophene-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-1,2,4,5-tetracyanobenzene, dibenzothiophene-1,2,4,5-tetracyanobenzene-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-1,2,4,5-tetracyanobenzene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, and dibenzothiophene-1,2,4,5-tetracyanobenzene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane in the present invention.

[0029] Figure 8 Fluorescence microscope images and bright field images of dibenzothiophene-1,2,4,5-tetracyanobenzene-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-1,2,4,5-tetracyanobenzene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, and dibenzothiophene-1,2,4,5-tetracyanobenzene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane in the present invention.

[0030] Figure 9 Schematic diagram of the principle of the present invention. Detailed implementation manners

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the specific embodiments cited are not intended to limit the present invention.

[0032] Example 1

[0033] Take 9.2 mg of dibenzothiophene and 10.2 mg of 7,7,8,8 - tetracyanoquinodimethane and dissolve them in 10 mL of dichloromethane, and ultrasonicate for 5 minutes to obtain an organic solvent stock solution A. Take 1 mL of the organic solvent stock solution A and add it to 1 mL of ethanol and shake well to obtain an organic solvent stock solution B. Take 9.2 mg of dibenzothiophene and 8.9 mg of 1,2,4,5 - tetracyanobenzene and dissolve them in 10 mL of dichloromethane and ultrasonicate for 5 minutes to obtain an organic solvent stock solution C. Take 1 mL of the organic solvent stock solution C and add it to 1 mL of ethanol and shake well to obtain an organic solvent stock solution D. Let the organic solvent stock solutions B and D stand for ten seconds and then mix them evenly, and then drop them on the substrate. After the organic solvent evaporates completely, a dibenzothiophene - 1,2,4,5 - tetracyanobenzene - 7,7,8,8 - tetracyanoquinodimethane organic core - shell heterostructure is obtained.

[0034] Through a fluorescence microscope ( Figure 2 and Figure 8 ), an electron spin resonance spectrometer ( Figure 3 ), a fluorescence spectrometer ( Figure 4 and Figure 5 ), a powder X - ray diffractometer ( Figure 7 ), a transmission electron microscope and selected area electron diffraction ( Figure 6 ) and other testing means to characterize the organic micro - nanostructure crystals and heterostructures.

[0035] Example 2

[0036] Take 9.2 mg of dibenzothiophene and 12 mg of 2,5-difluoro-7,7,8,8-tetracyanoquinodimethane and dissolve them in 10 mL of dichloromethane, then ultrasonicate for 5 minutes to obtain organic solvent stock solution A. Take 1 mL of organic solvent stock solution A and add it to 1 mL of ethanol, shake well to obtain organic solvent stock solution B. Take 9.2 mg of dibenzothiophene and 8.9 mg of 1,2,4,5-tetracyanobenzene and dissolve them in 10 mL of dichloromethane, then ultrasonicate for 5 minutes to obtain organic solvent stock solution C. Take 1 mL of organic solvent stock solution C and add it to 1 mL of ethanol, shake well to obtain organic solvent stock solution D. Let organic solvent stock solutions C and D stand for ten seconds and then mix them evenly, then drop them on the substrate. After the organic solvent has evaporated completely, a dibenzothiophene-1,2,4,5-tetracyanobenzene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane organic core-shell heterostructure is obtained.

[0037] Example 3

[0038] Take 9.2 mg of dibenzothiophene and 13.8 mg of 1,2,4,5-tetracyanobenzene-7,7,8,8-tetracyanoquinodimethane and dissolve them in 10 mL of dichloromethane, then ultrasonicate for 5 minutes to obtain organic solvent stock solution A. Take 1 mL of organic solvent stock solution A and add it to 1 mL of ethanol, shake well to obtain organic solvent stock solution B. Take 9.2 mg of dibenzothiophene and 8.9 mg of 1,2,4,5-tetracyanobenzene and dissolve them in 10 mL of dichloromethane, then ultrasonicate for 5 minutes to obtain organic solvent stock solution C. Take 1 mL of organic solvent stock solution C and add it to 1 mL of ethanol, shake well to obtain organic solvent stock solution D. Let organic solvent stock solutions C and D stand for ten seconds and then mix them evenly, then drop them on the substrate. After the organic solvent has evaporated completely, a dibenzothiophene-1,2,4,5-tetracyanobenzene-1,2,4,5-tetracyanobenzene-7,7,8,8-tetracyanoquinodimethane organic core-shell heterostructure is obtained.

[0039] Effect Evaluation 1

[0040] See Figure 1 , which is a schematic diagram of the organic molecular structure with π-conjugation in this example. It can be seen from the figure that these organic conjugated molecules have similar molecular structures and high chemical and structural compatibility, which provides a good material basis for their selective heteroepitaxial nucleation and corresponding epitaxial growth process, and is conducive to the successful construction of organic heterostructures.

[0041] See Figure 2, The fluorescence microscope images of the dibenzothiophene-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, and dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane prepared in Example 1 show that dibenzothiophene-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, and dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane are all in the shape of one-dimensional rods. The size of dibenzothiophene-7,7,8,8-tetracyanoquinodimethane is about 200 microns, and the sizes of dibenzothiophene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane and dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane are about 50 microns. These one-dimensional micro-rods all have regular morphologies and smooth surfaces, which are beneficial to suppressing optical losses caused by light refraction and ensuring their excellent optical properties.

[0042] See Figure 3 , The electron spin resonance spectra of the dibenzothiophene, dibenzothiophene-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, and dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane prepared in Example 1 show that dibenzothiophene does not show an electron spin resonance signal, while dibenzothiophene-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, and dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane all exhibit obvious electron spin resonance signals, and the signal intensity shows a gradually increasing trend. These confirm the existence of charge transfer in the system and its increasing intensity.

[0043] See Figure 4 , The fluorescence emission spectra of the dibenzothiophene-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, and dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane prepared in Example 1 show that under ultraviolet light irradiation, the emission peak of dibenzothiophene-7,7,8,8-tetracyanoquinodimethane is at 710 nm, the emission peak of dibenzothiophene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane is at 790 nm, and the emission peak of dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane is at 840 nm. The position of the main peak of the emission spectrum proves the successful preparation of the near-infrared organic co-crystal, and the red shift of its spectrum also confirms the enhancement of charge transfer in the system.

[0044] See Figure 5 , the fluorescence microscope images and fluorescence emission spectra of the dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane-1,2,4,5-tetracyanobenzene organic core-shell heterostructure prepared in Example 1 show that: for the shell part (labeled 1), under ultraviolet light irradiation, the emission peak is at 840 nm, while for the core part (labeled 3), under ultraviolet light irradiation, the emission peak is at 490 nm. These results are in good agreement with the fluorescence spectra of single dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane and dibenzothiophene-1,2,4,5-tetracyanobenzene microwires. In addition, the fluorescence spectrum of the heterojunction (labeled 2) contains the near-infrared emission (840 nm) of dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane and the green emission (590 nm) of dibenzothiophene-1,2,4,5-tetracyanobenzene, which confirms the successful construction of the organic core-shell heterostructure.

[0045] See Figure 6 , the transmission electron microscopy images and selected area electron diffraction images of the dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane-1,2,4,5-tetracyanobenzene organic core-shell heterostructure prepared in Example 1 show that: both the shell part and the core part grow along the

[100] direction, which is consistent with the growth directions of dibenzothiophene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane and dibenzothiophene-1,2,4,5-tetracyanobenzene.

[0046] See Figure 7 , the X-ray diffraction patterns of the organic near-infrared eutectic and core-shell heterostructure prepared in Example 1 show that: the patterns are in complete agreement with the theoretical data, and the prepared samples are indeed the corresponding organic micro-nano crystals; in addition, the diffraction peaks of the heterostructure simultaneously contain the corresponding characteristic diffraction peaks of the two components, which all confirm the successful preparation of the organic near-infrared eutectic and core-shell heterostructure.

[0047] See Figure 8 , the fluorescence microscope images and bright-field images of dibenzothiophene-1,2,4,5-tetracyanobenzene-7,7,8,8-tetracyanoquinodimethane, dibenzothiophene-1,2,4,5-tetracyanobenzene-2,5-difluoro-7,7,8,8-tetracyanoquinodimethane, and dibenzothiophene-1,2,4,5-tetracyanobenzene-2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane prepared in Example 1 show that: the prepared core-shell heterostructures all present as one-dimensional rod-shaped, with a size of about 40 microns, and an obvious heterointerface is shown between the shell layer and the core layer, which proves the successful preparation of the organic core-shell heterostructure.

[0048] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or alterations can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or alterations derived therefrom still fall within the protection scope of the present invention.

Claims

1. A method for preparing an organic semi-core-shell heterostructure with visible light to near-infrared waveguide conversion, characterized in that: The steps include: S1: preparing a first organic solvent stock solution and a second organic solvent stock solution respectively; the first organic solvent stock solution is obtained by mixing donor molecule A and acceptor molecule B in a good organic solvent, and the second organic solvent stock solution is obtained by mixing donor molecule A and acceptor molecule C in a good organic solvent; the acceptor molecule B and the acceptor molecule C are different; S2: adding a poor solvent to the first organic solvent stock solution and the second organic solvent stock solution respectively at room temperature, and allowing to stand to obtain a first solution and a second solution; S3: After mixing the first solution and the second solution in step S2, the mixture is covered on a substrate, and dried to obtain the organic semi-core-shell heterostructure with visible light to near-infrared waveguide conversion.

2. The preparation method according to claim 1, characterized in that In the first organic solvent stock solution and the second organic solvent stock solution, the molar ratio of the donor molecule to the acceptor molecule is 1-4:1-4.

3. The preparation method according to claim 1, characterized in that: The donor molecule A is selected from dibenzothiophene, benzonaphthyl (1,2-d) thiazole, dinaphthol [2,1-b: 1',2'-d] thiophene, dinaphthyl benzothiophene, benzo [1,2-b: 4,5-b'] dithiophene, dithiophene [3,2-b: 2',3'-d] thiophene, naphtho [1,2-b: 5,6-b'] dithiophene, benzo [b] benzo [4,5] thieno [2,3-d] thiophene, tetrathiafulvalene, dibenzotetrathiafulvalene, (E) -4,4'-dimethyltetrathiafulvalene, 4,4',5,5'-tetramethyltetrathiafulvalene, (E) -4,4'-dimethyl-5,5'-diphenyltetrathiafulvalene and 4,4',5,5'-tetraphenyltetrathiafulvalene.

4. The preparation method according to claim 1, characterized in that: The receptor molecule B and the receptor molecule C are independently selected from 1,2,4,5-tetracyanobenzene, 7,7,8,8-tetracyanobenzoquinodimethane, 2-fluoro-7,7,8,8-tetracyanobenzoquinodimethane, 2,5-difluoro-7,7,8,8-tetracyanobenzoquinodimethane, 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanobenzoquinodimethane, tetrafluoro-p-benzoquinone, tetrachloro-p-benzoquinone, tetrabromo-p-benzoquinone, tetraiodo-p-benzoquinone, 4,5-difluoro-3,6-tetracyano-p-benzoquinone, 4,5-dichloro-3,6-tetracyano-p-benzoquinone, 11,11,12,12-tetracyanonaphthalene-2,6-quinodimethane and 1,3,5,7-tetrafluoro-11,11,12,12-tetracyanonaphthalene-2,6-quinodimethane.

5. The preparation method according to claim 1, characterized in that: The good organic solvent is selected from one or two of dichloromethane, chloroform, acetonitrile, tetrahydrofuran and chlorobenzene.

6. The preparation method according to claim 1, characterized in that: In the first organic solvent stock solution or the second organic solvent stock solution, the concentration of the solute is 2-10 mmol / L.

7. The preparation method according to claim 1, characterized in that: The poor solvent is selected from one or two of ethanol, methanol, isopropanol, n-hexane, cyclohexane and toluene.

8. The preparation method according to claim 1, characterized in that: The volume ratio of the first organic solvent stock solution or the second organic solvent stock solution to the poor solvent is 1-10:2; when mixed, the volume ratio of the first solution to the second solution is 1-10:

2.

9. An organic semi-core-shell heterostructure with visible light to near-infrared waveguide conversion prepared by the preparation method according to any one of claims 1 to 8.

10. Application of the organic semi-core-shell heterostructure with visible light to near-infrared waveguide conversion as claimed in claim 9 in the field of organic photonic information encryption.

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