CN113087727A - Anthracene-thieno [3,4-b ] thiophene-based compounds and their use in organic electronic devices - Google Patents
Anthracene-thieno [3,4-b ] thiophene-based compounds and their use in organic electronic devices Download PDFInfo
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Abstract
The invention discloses an anthracene-thieno [3,4-b ] thiophene compound and application thereof in organic electronic devices, in particular to application in organic photovoltaic devices. The derivative consists of an anthracene structure unit, a thiophene unit, a thieno [3,4-b ] thiophene structure unit and an electron-withdrawing group, and intramolecular charge transfer enables the material to better absorb sunlight and improve photoelectric conversion efficiency. The invention also discloses an organic electronic device based on the anthracene-thieno [3,4-b ] thiophene compound and a preparation method thereof, in particular to an organic photovoltaic device, which provides better materials and preparation technical options for organic photovoltaic application.
Description
Technical Field
The invention relates to the technical field of photoelectric materials and application, in particular to a compound based on anthracene-thieno [3,4-b ] thiophene and application thereof in the field of organic photovoltaics.
Background
With the technological progress and the continuous development of social economy, the human society faces increasingly severe energy problems and environmental problems. Solar energy is a green renewable energy source, has the advantages of large total amount, wide distribution and the like, and is an important direction for the development of future energy sources. A great deal of research is conducted on technical problems of solar energy-electric energy conversion materials, devices, energy loss and the like in the global academic world and the industrial world.
The traditional solar cell technology uses inorganic materials such as silicon, and although the cells are commercialized, the production process is complex, the cost is high, flexible processing cannot be realized, and more pollutants are generated in the raw material manufacturing process. The organic solar cell has the advantages of light weight, flexibility, various and adjustable material structure designs, good processing performance and the like, and is widely concerned in the world. Early organic solar devices were fabricated using vacuum evaporation, and with the emergence of polymer Bulk Heterojunction (BHJ) based device structures, solution processing approaches to organic solar cell fabrication became the mainstream trend. The polymer has good film-forming property and is easy to process in solution, however, the photoelectric properties of the polymers in different synthetic batches are changed, and the result reproducibility of the device cannot be ensured. The micromolecule has a single structure, is easy to purify, has high mobility and is easy to regulate and control the energy level band gap, and has very important development prospect.
In organic solar cell material research, designing and synthesizing narrow band gap polymers is a very important research hotspot (adv. mater, 2015,27, 4655; Joule,2019,3,1), and donor (D) -acceptor (a) monomer alternation in the polymers can enhance intramolecular charge transfer, thereby reducing the polymer band gap. And the energy level and the effective conjugation length of the small molecular donor material based on the A-D-A type or the D-A-D type and other D-A alternating hosts can be adjusted, so that a more advantageous molecular stacking form is formed.
Disclosure of Invention
Based on the above, the invention aims to provide an anthracene-thieno [3,4-b ] thiophene compound and application thereof in electronic devices.
The specific technical scheme is as follows:
the invention provides an anthracene-thieno [3,4-b ] thiophene compound shown as a general formula (I):
wherein:
r101 to R106, which may be identical or different, are H, D, or a straight-chain alkyl, alkoxy or thioalkoxy radical having 1 to 20C atoms, or a branched chain having 3 to 20C atomsOr cyclic alkyl, alkoxy or thioalkoxy, or is substituted or unsubstituted silyl, or substituted keto having 1 to 20C atoms, or alkoxycarbonyl having 2 to 20C atoms, or aryloxycarbonyl having 7 to 20C atoms, cyano (-CN), carbamoyl (-C (═ O) NH2) Haloformyl (-C (═ O) -X wherein X represents a halogen atom), formyl (-C (═ O) -H), isocyano, isocyanate, thiocyanate or isothiocyanate, hydroxy, nitro, CF3Cl, Br, F, a crosslinkable group, or a substituted or unsubstituted aromatic or heteroaromatic ring system having from 5 to 40 ring atoms, or an aryloxy or heteroaryloxy group having from 5 to 40 ring atoms, or a combination of these systems, where one or more of the radicals can form a mono-or polycyclic aliphatic or aromatic ring system with one another and/or with the rings to which the radicals are bonded. One or more of the above-mentioned various groups H may be further substituted by D;
a is a conjugated electron withdrawing group.
The invention also provides an application of the anthracene-thieno [3,4-b ] thiophene compound as an organic solar cell donor material.
The invention also provides an application of the anthracene-thieno [3,4-b ] thiophene compound, and a photoelectric conversion layer for an organic solar cell device is prepared from the anthracene-thieno [3,4-b ] thiophene compound material and an electron acceptor material.
The invention also provides an application of the anthracene-thieno [3,4-b ] thiophene compound donor material, which is characterized in that the specific preparation method of the photoelectric conversion layer comprises the following steps: mixing an anthracene-thieno [3,4-b ] thiophene compound-based donor material and an electron acceptor material, adding a solvent for dissolving to obtain slurry, coating the slurry on conductive glass to prepare a thin film, and then preparing the organic solar cell device.
The invention also provides application of the anthracene-thieno [3,4-b ] thiophene compound donor material, which is characterized in that the solvent is at least one of trichloromethane, o-dichlorobenzene and tetrahydrofuran.
The invention also provides anthracene-thieno [3,4-b]Use of a thiophene donor material, characterised in that it is based on anthracene-thieno [3,4-b ]]The molar ratio of the thiophene donor material to the electron acceptor material is 1: 1 to 1.5; the electron acceptor material is PC61BM，PC71BM and an organic electron acceptor material.
Has the advantages that:
the invention designs and synthesizes a series of plane small molecular materials with stronger crystallinity, anthracene modified by different electron donating groups is taken as a nucleus, electron withdrawing groups with two symmetrical ends are taken as acceptor units, and alkyl chains with different lengths are introduced to enhance the solubility. The series of molecules have good solubility in common solvents (such as trichloromethane, chlorobenzene, toluene and the like), and are easy to process in solution, and thin film devices prepared from the compounds have high photoelectric conversion efficiency.
Description of the drawings: fig. 1 is a view showing a structure of a preferred light emitting device according to the present invention, in which 101 is a substrate, 102 is an anode, 103 is an anode buffer layer, 104 is a photoactive layer, 105 is a cathode buffer layer, and 106 is a cathode.
Detailed description of the invention:
to facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention provides an anthracene-thieno [3,4-b ] thiophene compound shown as a general formula (I):
wherein:
R101-R106, which may be the same or different, are H, D, or a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 20C atoms, or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 20C atoms, or a substituted or unsubstituted silyl group, or a substituted keto group having 1 to 20C atoms, or an alkoxycarbonyl group having 2 to 20C atoms, or an aryloxycarbonyl group having 7 to 20C atoms, a cyano group (-CN), a carbamoyl group (-C (═ O) NH2) Haloformyl (-C (═ O) -X wherein X represents a halogen atom), formyl (-C (═ O) -H), isocyano, isocyanate, thiocyanate or isothiocyanate, hydroxy, nitro, CF3Cl, Br, F, a crosslinkable group, or a substituted or unsubstituted aromatic or heteroaromatic ring system having from 5 to 40 ring atoms, or an aryloxy or heteroaryloxy group having from 5 to 40 ring atoms, or a combination of these systems, where one or more of the radicals can form a mono-or polycyclic aliphatic or aromatic ring system with one another and/or with the rings to which the radicals are bonded. One or more of the above-mentioned various groups H may be further substituted by D;
a is a conjugated electron withdrawing group.
In some embodiments, R101-R106, which may be the same or different, are H, D, or a straight chain alkyl, alkoxy, or thioalkoxy group having 1 to 10C atoms, or a branched or cyclic alkyl, alkoxy, or thioalkoxy group having 3 to 10C atoms, or a substituted or unsubstituted silyl group, or a substituted keto group having 1 to 10C atoms, or an alkoxycarbonyl group having 2 to 10C atoms, or an aryloxycarbonyl group having 7 to 10C atoms, a cyano group (-CN), a carbamoyl group (-C (═ O) NH2) Haloformyl (-C (═ O) -X wherein X represents a halogen atom), formyl (-C (═ O) -H), isocyano, isocyanate, thiocyanate or isothiocyanate, hydroxy, nitro, CF3Cl, Br, F, crosslinkable groups,or a substituted or unsubstituted aromatic or heteroaromatic ring system having from 5 to 20 ring atoms, or aryloxy or heteroaryloxy groups having from 5 to 20 ring atoms, or a combination of these systems, where one or more of the radicals can form a mono-or polycyclic aliphatic or aromatic ring system with one another and/or with the ring to which the radicals are bonded. One or more of the above-mentioned various groups H may be further substituted by D;
it is to be noted that the aromatic group means a hydrocarbon group containing at least one aromatic ring. An aromatic ring system refers to a ring system that includes both monocyclic groups and polycyclic groups. The above-mentioned heteroaromatic group means a hydrocarbon group (containing a heteroatom) containing at least one heteroaromatic ring. Heteroaromatic ring systems refer to ring systems that include both monocyclic groups and polycyclic rings. These polycyclic rings may have two or more rings in which two carbon atoms are shared by two adjacent rings, i.e., fused rings. At least one of these ring species of the polycyclic ring is aromatic or heteroaromatic. For the purposes of the present invention, aromatic or heteroaromatic ring systems include not only aromatic or heteroaromatic systems, but also systems in which a plurality of aryl or heteroaryl groups may also be interrupted by short nonaromatic units (< 10% of non-H atoms, such as C, N or O atoms). In one embodiment, a plurality of aryl or heteroaryl groups may also be interrupted by short non-aromatic units (less than 5% atomic number based on non-H atoms). Thus, for example, systems such as 9,9' -spirobifluorene, 9, 9-diarylfluorene, triarylamines, diaryl ethers, etc., are likewise considered aromatic ring systems for the purposes of the present invention.
In one embodiment, the aromatic group is selected from benzene, naphthalene, anthracene, phenanthrene, perylene, tetracene, pyrene, benzopyrene, triphenylene, acenaphthylene, fluorene, spirofluorene, or derivatives thereof.
In one embodiment, the heteroaromatic group is selected from furan, benzofuran, dibenzofuran, thiophene, benzothiophene, dibenzothiophene, pyrrole, pyrazole, triazole, imidazole, oxazole, oxadiazole, thiazole, tetrazole, indole, carbazole, pyrroloimidazole, pyrrolopyrrole, thienopyrrole, thienothiophene, furopyrrole, furofuran, thienofuran, benzisoxazole, benzisothiazole, benzimidazole, pyridine, pyrazine, pyridazine, pyrimidine, triazine, quinoline, isoquinoline, phthalazine, quinoxaline, phenanthridine, primary pyridine, quinazoline, quinazolinone, or a derivative thereof.
In some embodiments, R101-R102 are the same or different from each other, and at least one of the R101, R102 is selected from the following structures:
wherein:
R201-R202independently selected from H, D, or a straight chain alkyl, alkoxy or thioalkoxy group having 1 to 20C atoms, or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 20C atoms, or a substituted or unsubstituted silyl group, or a substituted keto group having 1 to 20C atoms, or an alkoxycarbonyl group having 2 to 20C atoms, or an aryloxycarbonyl group having 7 to 20C atoms, a cyano group (-CN), a carbamoyl group (-C (═ O) NH2) Haloformyl (-C (═ O) -X wherein X represents a halogen atom), formyl (-C (═ O) -H), isocyano, isocyanate, thiocyanate or isothiocyanate, hydroxy, nitro, CF3Cl, Br, F, a crosslinkable group, or a substituted or unsubstituted aromatic or heteroaromatic ring system having from 5 to 40 ring atoms, or an aryloxy or heteroaryloxy group having from 5 to 40 ring atoms, or a combination of these systems, where one or more of the radicals can form a mono-or polycyclic aliphatic or aromatic ring system with one another and/or with the rings to which the radicals are bonded. One or more of the above-mentioned various groups H may be further substituted by D;
denotes the site of single bond attachment.
In one embodiment, R201-R202Independently selected from H, D, or a straight chain alkyl, alkoxy or thioalkoxy group having 1 to 10C atoms, or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 10C atoms, or a substituted or unsubstituted silyl group, or a substituted keto group having 1 to 10C atomsOr an alkoxycarbonyl group having 2 to 10C atoms, or an aryloxycarbonyl group having 7 to 10C atoms, a cyano group (-CN), a carbamoyl group (-C (═ O) NH2) Haloformyl (-C (═ O) -X wherein X represents a halogen atom), formyl (-C (═ O) -H), isocyano, isocyanate, thiocyanate or isothiocyanate, hydroxy, nitro, CF3Cl, Br, F, a crosslinkable group, or a substituted or unsubstituted aromatic or heteroaromatic ring system having from 5 to 20 ring atoms, or an aryloxy or heteroaryloxy group having from 5 to 20 ring atoms, or a combination of these systems, where one or more of the radicals can form a mono-or polycyclic aliphatic or aromatic ring system with one another and/or with the rings to which the radicals are bonded. One or more of the above-mentioned various groups H may be further substituted by D;
in some embodiments, the R is103-R106Are the same, and said R103-R106Selected from H, F or C6H13。
In some embodiments, the compounds are of the general formulae (II-1) to (II-6).
In some embodiments, each occurrence of a is independently selected from any one of the following structures:
wherein:
r' is H, D, or a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 20C atoms, or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 20C atoms, or a substituted or unsubstituted silyl group, or a C atom-containing group having 1 to 20 carbon atomsSubstituted keto groups of the group, or alkoxycarbonyl groups having 2 to 20C atoms, or aryloxycarbonyl groups having 7 to 20C atoms, cyano groups (-CN), carbamoyl groups (-C (═ O) NH2) Haloformyl (-C (═ O) -X wherein X represents a halogen atom), formyl (-C (═ O) -H), isocyano, isocyanate, thiocyanate or isothiocyanate, hydroxy, nitro, CF3Cl, Br, F, a crosslinkable group, or a substituted or unsubstituted aromatic or heteroaromatic ring system having from 5 to 40 ring atoms, or an aryloxy or heteroaryloxy group having from 5 to 40 ring atoms, or a combination of these systems, where one or more of the radicals can form a mono-or polycyclic aliphatic or aromatic ring system with one another and/or with the rings to which the radicals are bonded. One or more of H in each of the groups described above may be further substituted by D or F;
X1-X4the same or different, at each occurrence independently selected from: H. d, straight-chain alkyl, alkoxy or thioalkoxy groups having 1 to 20C atoms, branched or cyclic alkyl groups having 3 to 20C atoms, silyl groups, keto groups having 1 to 20C atoms, alkoxycarbonyl groups having 2 to 20C atoms, aryloxycarbonyl groups having 7 to 20C atoms, cyano groups, carbamoyl groups, haloformyl groups, formyl groups, isocyano groups, isocyanato groups, thiocyanato groups, isothiocyanato groups, hydroxyl groups, nitro groups, CF3, Cl, Br, F or combinations of these groups;
indicates the site of double bond attachment.
In some embodiments, R' is H, D, or a straight chain alkyl, alkoxy, or thioalkoxy group having 1 to 10C atoms, or a branched or cyclic alkyl, alkoxy, or thioalkoxy group having 3 to 10C atoms, or a substituted or unsubstituted silyl group, or a substituted keto group having 1 to 10C atoms, or an alkoxycarbonyl group having 2 to 10C atoms, or an aryloxycarbonyl group having 7 to 10C atoms, a cyano group (-CN), a carbamoyl group (-C (═ O) NH2) Haloformyl (-C (═ O) -X wherein X represents a halogen atom), formyl (-C (═ O) -H), isocyano, isocyanate, thiocyanate or isothiocyanate, hydroxy, nitro, CF3，Cl，Br，FCrosslinkable radicals, or substituted or unsubstituted aromatic or heteroaromatic ring systems having from 5 to 20 ring atoms, or aryloxy or heteroaryloxy groups having from 5 to 20 ring atoms, or combinations of these systems, where one or more radicals can form a mono-or polycyclic aliphatic or aromatic ring system with one another and/or with the ring bonded to the radicals. One or more of H in each of the groups described above may be further substituted by D or F;
in some embodiments, X1-X4The same or different, at each occurrence independently selected from: H. d, straight-chain alkyl, alkoxy or thioalkoxy groups having 1 to 10C atoms, branched or cyclic alkyl groups having 3 to 10C atoms, silyl groups, keto groups having 1 to 10C atoms, alkoxycarbonyl groups having 2 to 10C atoms, aryloxycarbonyl groups having 7 to 15C atoms, cyano groups, carbamoyl groups, haloformyl groups, formyl groups, isocyano groups, isocyanato groups, thiocyanato groups, isothiocyanato groups, hydroxyl groups, nitro groups, CF3, Cl, Br, F or combinations of these groups;
in some embodiments, X1-X4The same or different, at each occurrence independently selected from: H. d, cyano, carbamoyl, haloformyl, formyl, isocyano, isocyanato, thiocyanate, isothiocyanate, hydroxy, nitro, CF3，Cl，Br，F；
Specific examples of the anthracene-thieno [3,4-b ] thiophene-based compounds according to the present invention are as follows, but are not limited thereto.
In one embodiment, anthracene-thieno [3,4-b ] thiophene-based compounds may be used as active layer materials in electronic devices.
In one embodiment, the above compound has a solubility in chloroform of 2mg/ml or more at 25 ℃. In one embodiment, the above compound has a solubility in chloroform of 3mg/ml or more at 25 ℃. In one embodiment, the above compound has a solubility in chloroform of 5mg/ml or more at 25 ℃.
A synthetic method based on anthracene-thieno [3,4-b ] thiophene compound shown in any formula, wherein raw materials containing active groups are used for reaction. These active starting materials contain at least one leaving group, for example, fluorine, chlorine, bromine, iodine, boronic acid or boronic esters. Suitable reactions for forming C-C linkages are well known to those skilled in the art and described in the literature, and particularly suitable and preferred coupling reactions are SUZUKI, STILLE and HECK coupling reactions.
The invention further relates to an organic electronic device comprising at least one organic compound as described above. Generally, such an organic electronic device comprises at least a cathode, an anode and a functional layer located between the cathode and the anode, wherein the functional layer comprises at least one organic compound as described above. The Organic electronic device can be selected from, but not limited to, an Organic photovoltaic cell (OPV), an Organic Light Emitting Diode (OLED), an Organic light Emitting cell (OLEEC), an Organic Field Effect Transistor (OFET), an Organic light Emitting field effect transistor (fet), an Organic laser, an Organic spintronic device, an Organic sensor, an Organic Plasmon Emitting Diode (Organic plasma Emitting Diode), and the like, and particularly preferred is an Organic photovoltaic cell (OPV).
In certain particularly preferred embodiments, the organic photovoltaic device structure includes a substrate 1, an anode 2, an anode buffer layer 3, an active layer 4, a cathode buffer layer 5, and a cathode 6.
The substrate may be opaque or transparent. The substrate may be rigid or flexible. The substrate may be plastic, metal, semiconductor wafer or glass. Preferably, the substrate has a smooth surface. A substrate free of surface defects is a particularly desirable choice. In a preferred embodiment, the substrate is rigid and may be selected from glass. In another preferred embodiment, the substrate is flexible, and may be selected from polymeric films or plastics having a glass transition temperature Tg of 150 deg.C or greater, preferably greater than 200 deg.C, more preferably greater than 250 deg.C, and most preferably greater than 300 deg.C. Examples of suitable flexible substrates are poly (ethylene terephthalate) (PET) and polyethylene glycol (2, 6-naphthalene) (PEN).
The anode comprises a conductive metal or metal oxide, or a conductive polymer. Examples of anode materials include, but are not limited to: al, Cu, Au, Ag, Mg, Fe, Co, Ni, Mn, Pd, Pt, ITO, zinc oxide (ZnO), etc. Other suitable anode materials are known and can be readily selected for use by one of ordinary skill in the art. The anode material may be deposited using any suitable technique, such as a suitable physical vapor deposition method including radio frequency magnetron sputtering, vacuum thermal evaporation, electron beam (e-beam), and the like. In certain embodiments, the anode is pattern structured. Patterned ITO conductive substrates are commercially available and can be used to prepare devices according to the present invention.
The cathode includes a conductive metal or metal oxide. Examples of cathode materials include, but are not limited to: al, Au, Ag, Ca, Ba, Mg, LiF/Al, MgAg alloy, BaF2Al, Cu, Fe, Co, Ni, Mn, Pd, Pt, ITO, etc. The cathode material may be deposited using any suitable technique, such as a suitable physical vapor deposition method, including radio frequency magnetron sputtering, vacuum thermal evaporation, electron beam (e-beam), and the like.
The anode and cathode buffer layers comprise a conductive metal oxide, metal halide, or conductive polymer. Anode buffer layer materials include, but are not limited to, PEDOT: PSS, V2O5、MoO3And the like. The cathode buffer layer includes, but is not limited to, PFN, PDIN, LiF, etc. The anode and cathode buffer layer materials may be deposited using any suitable technique, such as spin coating, vacuum thermal evaporation, and the like.
In a preferred embodiment, in the organic photovoltaic cell device according to the present invention, the active layer material thereof comprises said anthracene-thieno [3,4-b ] thiophene based compound.
The organic photovoltaic cell device according to the invention is at 1.5G (100mw cm)-2) Under the irradiation of white light, the Photoelectric Conversion Efficiency (PCE) is 4.65-12.68%.
The invention also relates to the use of the organic electronic device according to the invention in various electronic devices, including, but not limited to, display devices, charging devices, sensors, etc.
The invention also relates to electronic devices including, but not limited to, display devices, charging devices, sensors, etc., incorporating the organic electronic device according to the invention.
The present invention will be described in connection with preferred embodiments, but the present invention is not limited to the following embodiments, and it should be understood that the appended claims outline the scope of the present invention and those skilled in the art, guided by the inventive concept, will appreciate that certain changes may be made to the embodiments of the invention, which are intended to be covered by the spirit and scope of the appended claims.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Example 1: synthesis of Compound 1
Synthesis of intermediates 1 to 3: compound 1-1(1.0mol) and tetrabutylammonium bromide (1.0mol) were dissolved in 15L of CH2Cl2In (1). To this solution was added Na2S2O4(2.5mol) and 7.5L of 20% aqueous sodium hydroxide solution in N2The reaction was stirred at room temperature for 2h under atmosphere. Slowly add compound 1-2(10mol) via syringe, in N2The reaction was stirred at room temperature for 8 hours under an atmosphere and then CH was added2Cl2And (4) extracting. The combined organic layer was washed with water and saturated brine, and then with anhydrous Na2SO4Drying and removing the solvent. Separating and purifying with silica gel column chromatography with n-hexane/CH as mobile phase2Cl2(4/1, v/v) was as, and yellow solid intermediates 1-3 were obtained (408.61g, 69.0%).
Synthesis of intermediates 1 to 5: intermediate 1-3(0.6mol), compound 1-4(2mol), sodium carbonate (3.2mol), tetrakistriphenylphosphine palladium (0.06mol) were dissolved in 5L of a mixed solvent (V water: V toluene ═ 1: 3), N at 90 ℃2The reaction was stirred under ambient overnight. After the reaction, the reaction product is cooled to room temperature, ethyl acetate is added for dilution and extraction, an organic phase is collected, the organic phase is dried by anhydrous magnesium sulfate, then is filtered and filtered, after the solvent is dried in a spinning mode, the separation and purification are carried out by silica gel chromatography, and petroleum ether/dichloromethane (20/1, v/v) serves as a mobile phase to obtain intermediates 1-5(343.5g, the yield is 75.1%)
Synthesis of intermediates 1 to 7: mixing the intermediate 1-5(0.1mol), the compound 1-6(0.25mol), KOAc (0.3mol), Pd (OAc)2(0.03mmol) in 1L DMAC, N2Stirring and reacting at 130 deg.C for 20 hr, removing solvent, separating and purifying with silica gel chromatography to obtain intermediate 1-7(77.35g, 70.7% yield) with petroleum ether/dichloromethane (10/1, v/v) as mobile phase
Synthesis of Compound 1: intermediate 1 to 7(0.06mol), compound 1 to 8(0.18mol), ammonium acetate (0.09mol), and acetic acid (9mL) were dissolved in 500mL of toluene, and the mixture was refluxed for 2 hours, cooled to room temperature after completion of the reaction, washed with saturated brine, the solvent was removed, and the mixture was recrystallized from ethanol to obtain compound 1(61.68g, yield 86.4%).
Example 2: synthesis of Compound 2
Synthesis of intermediate 2-2: intermediate 1-5(0.1mol), Compound 1-6(0.3mol), KOAc (0.3mol), Pd (OAc)2(0.009mmol) were dissolved in 500mL DMAC, N2Stirring and reacting at 130 deg.C for 20 hr, removing solvent, separating and purifying with silica gel chromatography to obtain intermediate 2-2(76.02g, 65.2% yield) with petroleum ether/dichloromethane (10/1, v/v) as mobile phase
Synthesis of Compound 2: intermediate 2-2(0.06mol), compound 2-3(0.18mol), ammonium acetate (0.09mol), and acetic acid (9mL) were dissolved in 500mL of toluene, refluxed for 2 hours, cooled to room temperature after completion of the reaction, washed with saturated brine, the solvent was removed, and recrystallization was performed with ethanol to obtain compound 2(74.16g, yield 81.1%).
Example 3: synthesis of Compound 3
Synthesis of intermediate 3-2: mixing the intermediate 1-5(0.1mol), the compound 3-1(0.25mol), KOAc (0.3mol), Pd (OAc)2(0.03mmol) in 1L DMAC, N2Stirring and reacting at 130 deg.C for 20 hr, removing solvent, separating and purifying with silica gel chromatography to obtain intermediate 3-2(104.11g, 72.8% yield) with petroleum ether/dichloromethane (15/1, v/v) as mobile phase
Synthesis of Compound 3: intermediate 3-2(0.03mol), compound 3-3(0.09mol), ammonium acetate (0.05mol), and acetic acid (5mL) were dissolved in 500mL of toluene, refluxed for 2 hours, cooled to room temperature after completion of the reaction, washed with saturated brine, the solvent was removed, and recrystallized from ethanol to obtain compound 3(40.62g, yield 75.9%).
Example 4: synthesis of Compound 4
Synthesis of Compound 4: intermediate 3-2(0.03mol), compound 4-1(0.09mol), ammonium acetate (0.05mol), and acetic acid (5mL) were dissolved in 500mL of toluene, refluxed for 2 hours, cooled to room temperature after completion of the reaction, washed with saturated brine, the solvent was removed, and recrystallized from ethanol to obtain compound 4(44.47g, yield 77.7%).
Example 5: synthesis of Compound 5
Synthesis of intermediate 5-2: mixing compound 1-1(1.0mol), compound 5-1(2.5mol), KOAc (3.0mol), Pd (OAc)2(0.3mmol) in 10L DMAC, N2Stirring and reacting at 130 deg.C for 20 hr, removing solvent, separating and purifying by silica gel chromatography with petroleum ether/dichloromethane (20/1, v/v) as mobile phase to obtain intermediate 5-2(436.25g, 65.3% yield)
Synthesis of intermediate 5-3: intermediate 5-2(0.6mol), compound 1-4(2mol), sodium carbonate (3.2mol), tetrakistriphenylphosphine palladium (0.06mol) were dissolved in 5L of a mixed solvent (V water: V toluene ═ 1: 3), N at 90 ℃2The reaction was stirred under ambient overnight. After the reaction, the reaction product is cooled to room temperature, ethyl acetate is added for dilution and extraction, an organic phase is collected, the organic phase is dried by anhydrous magnesium sulfate, then is filtered and filtered, after the solvent is dried in a spinning mode, the separation and purification are carried out by silica gel chromatography, and petroleum ether/dichloromethane (20/1, v/v) serves as a mobile phase to obtain an intermediate 5-3(421.73g, the yield is 78.6%)
Synthesis of intermediates 5 to 4: intermediate 5-3(0.1mol), Compound 1-6(0.25mol), KOAc (0.3mol), Pd (OAc)2(0.03mmol) in 1L DMAC, N2Stirring at 130 deg.C for 20 hr, removing solvent, and separating and purifying by silica gel chromatography with petroleum ether/dichloromethane as mobile phaseAlkane (15/1, v/v) to give intermediate 5-4(98.10g, 80.02% yield)
Synthesis of Compound 5: intermediate 5-4(0.03mol), compound 5-5(0.09mol), ammonium acetate (0.05mol), and acetic acid (5mL) were dissolved in 500mL of toluene, refluxed for 2 hours, cooled to room temperature after completion of the reaction, washed with saturated brine, the solvent was removed, and recrystallized from ethanol to obtain compound 5(33.93g, yield 79.4%).
Example 6: synthesis of Compound 6
Synthesis of Compound 6: intermediate 5-4(0.03mol), compound 6-1(0.09mol), ammonium acetate (0.05mol), and acetic acid (5mL) were dissolved in 500mL of toluene, refluxed for 2 hours, cooled to room temperature after completion of the reaction, washed with saturated brine, the solvent was removed, and recrystallized from ethanol to give compound 6(32.68g, yield 71.2%).
Example 7: synthesis of Compound 7
Synthesis of intermediate 7-1: mixing the intermediate 5-3(0.1mol), the compound 3-1(0.25mol), KOAc (0.3mol), Pd (OAc)2(0.03mmol) in 1L DMAC, N2Stirring and reacting at 130 deg.C for 20 hr, removing solvent, separating and purifying by silica gel chromatography with petroleum ether/dichloromethane (15/1, v/v) as mobile phase to obtain intermediate 7-1(124.06g, 79.4% yield)
Synthesis of compound 7: intermediate 7-1(0.03mol), compound 7-2(0.09mol), ammonium acetate (0.05mol), and acetic acid (5mL) were dissolved in 500mL of toluene, refluxed for 2 hours, cooled to room temperature after completion of the reaction, washed with saturated brine, the solvent was removed, and recrystallized from ethanol to obtain compound 5(38.77g, yield 72.0%).
Example 8: synthesis of Compound 8
Synthesis of compound 8: intermediate 7-1(0.03mol), compound 2-3(0.09mol), ammonium acetate (0.05mol), and acetic acid (5mL) were dissolved in 500mL of toluene, refluxed for 2 hours, cooled to room temperature after completion of the reaction, washed with saturated brine, the solvent was removed, and recrystallized from ethanol to obtain compound 5(40.30g, yield 69.9%).
Example (b): preparation and characterization of organic photovoltaic devices:
the OPV device comprises the following functional layer materials:
anode: ITO;
anode buffer layer: a conductive polymer;
a photoactive layer: the invention relates to a chloroform mixed solution (1: 1.2, m/m) based on anthracene-thieno [3,4-b ] thiophene compounds and Y6;
cathode buffer layer: an ionic compound;
cathode: ag;
the preparation steps of the device are as follows:
a. firstly, cleaning conductive glass, and then carrying out ultraviolet ozone plasma treatment on the surface of a glass substrate;
b. coating the anode buffer layer on the surface of the ITO in a spin coating mode, and annealing; preparing a photoactive layer and a cathode buffer layer by a spin-coating-annealing method;
c. preparing a cathode layer by using a vacuum evaporation method;
the current-voltage (J-V) characteristics of each device were characterized by characterization equipment, while recording important parameters such as fill factor, photoelectric conversion efficiency, etc. as shown in table 1. The results show that the introduction of a large conjugated group thiophene on the conjugated backbone favors the formation of better pi-pi stacking and thus charge transport.
| OPV device | Donor material | Voc(V) | Jsc(mA cm-2) | Fill Factor(％) | Efficiency(％) |
| 1 | Compound 1 | 0.79 | 11.11 | 0.53 | 4.65 |
| 2 | Compound 2 | 0.85 | 12.06 | 0.67 | 6.87 |
| 3 | Compound 3 | 0.80 | 13.89 | 0.66 | 7.33 |
| 4 | Compound 4 | 0.88 | 13.77 | 0.69 | 8.36 |
| 5 | Compound 5 | 0.91 | 13.12 | 0.75 | 8.95 |
| 6 | Compound 6 | 0.92 | 14.46 | 0.73 | 9.71 |
| 7 | Compound 7 | 0.95 | 17.33 | 0.77 | 12.68 |
| 8 | Compound 8 | 0.94 | 15.20 | 0.77 | 11.00 |
The structural formula of Y6 in the device is as follows:
the technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An anthracene-thieno [3,4-b ] thiophene compound represented by the general formula (I):
wherein:
R101-R106, which may be identical or different, are H, D, or a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 20C atoms, or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 20C atoms, or a substituted or unsubstituted silyl group, or a substituted ketone group having 1 to 20C atoms, or an alkoxycarbonyl group having 2 to 20C atoms, or an aryloxycarbonyl group having 7 to 20C atoms, a cyano group (-CN), a carbamoyl group (-C (═ O) NH2), a haloformyl group (-C (═ O) -X where X represents a halogen atom), a formyl group (-C (═ O) -H), an isocyano group, an isocyanate, a thiocyanate or isothiocyanate, a hydroxyl group, a nitro group, CF3, Cl, Br, F, a crosslinkable group, or a substituted or unsubstituted aromatic or heteroaromatic ring system having 5 to 40 ring atoms, or aryloxy or heteroaryloxy groups having from 5 to 40 ring atoms, or combinations of these systems, where one or more of the radicals can form a mono-or polycyclic aliphatic or aromatic ring system with one another and/or with the rings to which the radicals are bonded. One or more of the above-mentioned various groups H may be further substituted by D;
a is a conjugated electron withdrawing group.
2. The anthracene-thieno [3,4-b ] thiophene compound of claim 1, wherein R101-R102 are the same as or different from each other; and at least one of the R101 and R102 is selected from the following structures:
wherein:
R201-R202, which may be identical or different, are H, D, or a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 20C atoms, or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 20C atoms, or a substituted or unsubstituted silyl group, or a substituted ketone group having 1 to 20C atoms, or an alkoxycarbonyl group having 2 to 20C atoms, or an aryloxycarbonyl group having 7 to 20C atoms, a cyano group (-CN), a carbamoyl group (-C (═ O) NH2), a haloformyl group (-C (═ O) -X where X represents a halogen atom), a formyl group (-C (═ O) -H), an isocyano group, an isocyanate, a thiocyanate or isothiocyanate, a hydroxyl group, a nitro group, CF3, Cl, Br, F, a crosslinkable group, or a substituted or unsubstituted aromatic or heteroaromatic ring system having 5 to 40 ring atoms, or aryloxy or heteroaryloxy groups having from 5 to 40 ring atoms, or combinations of these systems, where one or more of the radicals can form a mono-or polycyclic aliphatic or aromatic ring system with one another and/or with the rings to which the radicals are bonded. One or more of the above-mentioned various groups H may be further substituted by D;
denotes the site of single bond attachment.
3. The anthracene-thieno [3,4-b ] thiophene compound of claim 1, wherein the R103-R106 are the same and the R103-R106 are selected from H, F or C6H 13.
4. The organic compound of claims 1-3, wherein the compound has a structure represented by general formulae (II-1) to (II-6).
5. The anthracene-thieno [3,4-b ] thiophene compound of claim 1, wherein a, for each occurrence, is independently selected from any of the following structures:
wherein:
r' is H, D, or a straight-chain alkyl, alkoxy or thioalkoxy group having 1 to 20C atoms, or a branched or cyclic alkyl, alkoxy or thioalkoxy group having 3 to 20C atoms, or a substituted or unsubstituted silyl group, or a substituted ketone group having 1 to 20C atoms, or an alkoxycarbonyl group having 2 to 20C atoms, or an aryloxycarbonyl group having 7 to 20C atoms, a cyano group (-CN), a carbamoyl group (-C (═ O) NH2), a haloformyl group (-C (═ O) -X where X represents a halogen atom), a formyl group (-C (═ O) -H), an isocyano group, an isocyanate, a thiocyanate or isothiocyanate, a hydroxyl group, a nitro group, CF3, Cl, Br, F, a crosslinkable group, or a substituted or unsubstituted aromatic or heteroaromatic ring system having 5 to 40 ring atoms, or aryloxy or heteroaryloxy groups having from 5 to 40 ring atoms, or combinations of these systems, where one or more of the radicals can form a mono-or polycyclic aliphatic or aromatic ring system with one another and/or with the rings to which the radicals are bonded. One or more of H in each of the groups described above may be further substituted by D or F;
X1-X4 are the same or different and are independently selected at each occurrence from: H. d, straight-chain alkyl, alkoxy or thioalkoxy groups having 1 to 20C atoms, branched or cyclic alkyl groups having 3 to 20C atoms, silyl groups, keto groups having 1 to 20C atoms, alkoxycarbonyl groups having 2 to 20C atoms, aryloxycarbonyl groups having 7 to 20C atoms, cyano groups, carbamoyl groups, haloformyl groups, formyl groups, isocyano groups, isocyanato groups, thiocyanato groups, isothiocyanato groups, hydroxyl groups, nitro groups, CF3, Cl, Br, F or combinations of these groups;
indicates the site of double bond attachment.
6. Anthracene-thieno [3,4-b ] thiophene-based compound according to any one of claims 1 to 5, characterized in that R201 and R202 are independently selected from methyl, isopropyl, isobutyl, tert-butyl, n-hexyl, 2-ethylhexyl, n-octyl.
7. An application of an anthracene-thieno [3,4-b ] thiophene compound is characterized in that the anthracene-thieno [3,4-b ] thiophene compound is applied as an organic solar cell donor material.
8. The use of the anthracene-thieno [3,4-b ] thiophene-based compound according to claim 7, wherein the anthracene-thieno [3,4-b ] thiophene-based compound material and the electron acceptor material are combined to form a photoelectric conversion layer for an organic solar cell device.
9. The application of the anthracene-thieno [3,4-b ] thiophene compound-based donor material according to claim 8, characterized in that the specific preparation method of the photoelectric conversion layer is as follows: mixing an anthracene-thieno [3,4-b ] thiophene compound-based donor material and an electron acceptor material, adding a solvent for dissolving to obtain slurry, coating the slurry on conductive glass to prepare a thin film, and then preparing the organic solar cell device.
10. Use of an anthracene-thieno [3,4-b ] thiophene-based donor material according to claim 10, characterized in that the molar ratio of anthracene-thieno [3,4-b ] thiophene-based donor material to electron acceptor material is 1: 1 to 1.5; the electron acceptor material is at least one of PC61BM, PC71BM, Y6 and organic electron acceptor material.
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