CN110498793A - Small molecule photovoltaic body phase material and its application based on rhodanine - Google Patents

Small molecule photovoltaic body phase material and its application based on rhodanine Download PDF

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CN110498793A
CN110498793A CN201910742978.8A CN201910742978A CN110498793A CN 110498793 A CN110498793 A CN 110498793A CN 201910742978 A CN201910742978 A CN 201910742978A CN 110498793 A CN110498793 A CN 110498793A
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body phase
phase material
rhodanine
small molecule
organic solar
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CN110498793B (en
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朱卫国
童飞
邵麟
朱梦冰
刘煜
王亚飞
张斌
朱美香
谭华
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Changzhou University
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D417/00—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00
    • C07D417/14—Heterocyclic compounds containing two or more hetero rings, at least one ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for by group C07D415/00 containing three or more hetero rings
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K30/00—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation
    • H10K30/30—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising bulk heterojunctions, e.g. interpenetrating networks of donor and acceptor material domains
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/655—Aromatic compounds comprising a hetero atom comprising only sulfur as heteroatom
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60—Organic compounds having low molecular weight
    • H10K85/649—Aromatic compounds comprising a hetero atom
    • H10K85/656—Aromatic compounds comprising a hetero atom comprising two or more different heteroatoms per ring
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Abstract

Having invented a kind of rhodanine that is based on is hydrogen supply-receptor (AH) unit, there is AH- D-A or AH‑D‑AHFramework small molecule photovoltaic body phase material.This kind of body phase material has both hole/electron transport ability, complementary with electron donor/acceptor material effect absorption, and there are intermolecular hydrogen bondings and D-A to act on, and can improve organic solar batteries device efficiency and stability simultaneously.As electron donor PBDB-T and electron acceptor material PC60BM and body phase material are that 1:1:0.0125 obtains photoactive layer material in mass ratio, the energy conversion efficiency (PCE) of its body heterojunction organic solar device reaches 7.51%, after device places 120h, the PCE of device is still maintained at 5.0%, with PBDB-T:PC60BM prototype part is compared, and the efficiency of device improves 20%, and stability significantly improves.

Description

Small molecule photovoltaic body phase material and its application based on rhodanine
Technical field
It is hydrogen supply-electron acceptor (A that the present invention relates to one kind based on 2-thioxo-4-thiazolidinone (rhodanine)H) unit, 3- Alkyl rhodanine is electron acceptor (A) unit, electron (D) unit is center core with AH- D-A or AH-D-AHFramework The synthesis of small molecule photovoltaic body phase material and its application in organic solar batteries device.
Background technique
Today of 21 century, solar energy is because have widely distributed, no territory restriction, inexhaustible, nexhaustible, cleaning The advantages that pollution-free, has become the developing direction of new energy.Wherein, organic solar batteries (OSCs) and inorganic solar cell It compares, has that raw material sources are abundant, preparation process is simple, low manufacture cost, light-weight and can be prepared into flexible large area The unique advantage of device, it has also become countries in the world new energy development and the important directions utilized.
Photoactive layer material is the core of organic solar batteries, mainly includes electron donor material and electron acceptor material Material.Currently, the research based on OSCs active layer material is concentrated mainly on electron donor material and fullerene/non-fullerene electronics Acceptor material, based on the single-unit binary organic solar batteries device efficiency of fullerene and non-fullerene acceptor material difference Through breaking through 11%[1]With 16%[2].However, the efficiency and stability of organic solar batteries are still below inorganic solar cell Efficiency and stability.
Currently, the method for improving organic solar batteries performance and stability, which mainly has, develops new and effective electron donor Material and acceptor material[3,4], pass through the optimised devices processing technology such as thermal annealing, solvent anneal, solvent additive[5,6].In recent years, Some researchers have attempted to introduce the additive for forming hydrogen bond action with photoactive layer material in photoactive layer, obtain light The organic solar batteries that active layer pattern improves, energy efficiency significantly improves[7-12].Typical research includes: (1) Wu Chungui Team reports 2,3- dihydroxy-pyridine (DOH) as additive application in P3HT:PC61BM binary organic solar batteries device Part, when 2,3- dihydroxy-pyridine addition concentration is 2wt%, the energy conversion efficiency (PCE) of device by 1.29% promoted to 4.39%[7]；(2) Tao Silu team reports coumarin derivative Coumarin7 and chromene [3,2-c] pyridine derivate Bis- kinds of dyestuffs of SR197 as additive application in PTB7-Th:ITIC binary organic solar batteries, as Coumarin7 and When the weight concentration of SR197 addition is 10.0wt%, device PCE improves 30%~35%[8-10]Studies have shown that Development of Novel Photoactive layer additive is to improve organic solar batteries available strategy.
For this purpose, we have proposed design body phase materials to promote organic solar batteries energy conversion efficiency and stability New approaches.This kind of body phase material is the conjugation active layer material of a kind of framework containing A-D-A, not only have with it is matched to/receptor Energy level and spectrum, and have both hole/electron transport ability.As photoactive layer additive, it is applied to organic solar electricity Pond forms supermolecule and is conjugated photoactive layer, improve by intermolecular hydrogen bonding and D-A dipole and electronics to/acceptor material effect Photoactive layer pattern improves the light absorpting ability of photoactive layer.It is different from three traditional components, the additive amount of body phase material Less, usually 1~5wt% of electron donor material or electron acceptor material, passes through hydrogen supply-receptor unit of body phase material It with D-A unit, is acted on electron donor/acceptor material, new supramolecular system is self-assembled into according to certain mode, constructed " the pattern lock " of active layer, promotes the energy conversion efficiency and stability of device[12].It is added with traditional additive and hydrogen bond Agent is different, and body phase material is a kind of framework containing A-D-A and hydrogen supply-receptor unit conjugation active layer material, with electron donor/ Acceptor material mixing can form intermolecular hydrogen bonding and the effect of D-A dipole, optimize active layer pattern, improve active layer charge transmission Performance, metastable formation in inhibitory activity layer, slows down the degradation of active layer.Therefore, develop body phase material for whole promotion Organic solar batteries performance is significant[13-15].2-thioxo-4-thiazolidinone (rhodanine) is a kind of common electrophilic Unit, the amide structure of intramolecular, have hydrogen supply effect and strong electron-withdrawing ability, it is easy to electron donor in active layer/by The suction hydrogen-based member of body material, forms intermolecular hydrogen bonding；Simultaneously with center feed subelement, A-D-A skeleton is constituted, forms molecule Interior ICT effect.In addition, No. 3 positions of rhodanine are readily incorporated alkyl chain, solubility property and the crystallization of material can be effectively improved Performance.Therefore, we select 2-thioxo-4-thiazolidinone (rhodanine) for hydrogen supply-electron acceptor (AH) unit, 3- alkyl sieve Tannin combines for electron acceptor (A) unit, with different types of electron donor unit (D), constructs with AH- D-A or AH-D-AH The small molecule photovoltaic body phase material of configuration.With it has been reported that photoactive layer material compared with, the strong ICT of body phase material intramolecular Effect is mutually merged with intermolecular strong hydrogen bond action, and the molar extinction coefficient of material itself, reinforcing material pair both can be improved The absorption of light can also improve the pattern of active layer, promote the energy conversion efficiency and stability of entire device.
It is attached: leading reference
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Summary of the invention
For the energy conversion efficiency and device stability for improving photolytic activity pattern, improving organic solar batteries, Wo Menti Body phase material concept is gone out, and has invented a kind of with AH- D-A or AH-D-AHThe small molecule photovoltaic body phase material of framework.Body phase Material is characterized in (1) A-D-A type configuration, and (2) have both electrons and holes transmission performance, and (3) have stronger extinction energy Power, (4) and photoactive layer electron donor or acceptor material have intermolecular hydrogen bonding effect and D-A dipole to act on, (5) its absorb and Photoactive layer electron donor/acceptor material is complementary.
The molecular structure feature of this kind of body phase material is using rhodanine as hydrogen supply-receptor (AH) unit, 3- alkyl rhodanine For electron acceptor (A) unit, thiophene, benzene, 3,4- dimethoxy-thiophene, 3,4-rthylene dioxythiophene, thieno [3,2-b] thiophene Pheno, 2,2- bithiophene and its derivative etc. are electron donor (D) unit.
The purpose of the present invention is to provide a kind of novel AH- D-A or AH-D-AHThe small molecule photovoltaic body phase material of type is answered For organic solar batteries, photolytic activity pattern, enhancing photoactive layer extinction efficiency are adjusted by body phase material, obtain high energy Measure the organic solar batteries of transfer efficiency and stability.
With poly- [(2,6- (bis- two thiophenes of (5- (2- ethylhexyl) thiophene -2- base)-benzo [1,2-B:4,5-B'] of 4,8- Pheno))-simultaneously-(5,5- (bis- bis- (2- ethylhexyl) benzo [1', 2'-C:4', 5'-C'] two of -2- thienyl -5', 7'- of 1', 3'- Thiophene -4,8- diketone))] (PBDB-T) be donor material, [the different methyl esters of [6,6]-phenyl-C61- butyric acid] PC60BM is receptor In the binary body heterojunction organic solar batteries of material, body phase material is introduced, as PBDB-T and PC60BM and body phase material Mass ratio be 1:1:0.0125 when, the highest energy transfer efficiency of this kind of organic solar batteries containing body phase material mentions It is raised to 7.51%, and after device placement 120h, the energy conversion efficiency of device is still maintained at 5.0%.Device energy is realized to turn Change the Synchronous lifting of efficiency and stability.
This kind of AH- D-A and AH-D-AHThe molecular characterization of type small molecule photovoltaic body phase material is with shown in Formulas I 's.
Wherein, A is electron acceptor (A) unit；
Further, A be 3- alkyl rhodanine, structural formula:R2Selected from C2-C16One of alkyl.
AHFor hydrogen supply-electron acceptor unit；
Further, AHFor rhodanine, structural formula:
D is center core electron unit, structural formula are as follows:
Wherein, R1Selected from C2-C16One of alkyl, alkoxy, alkylthio group.
Application of the invention is: being applied to organic solar for the body phase material of design as photoactive layer added material Battery realizes the energy conversion efficiency of device and the Synchronous lifting of stability.
The organic solar batteries device uses formal structure, structure Glass/ITO/PEDOT:PSS/ Active layer/ PFN-Br/Al, including conductive glass electrode, indium tin oxide target (ITO), hole transmission layer (PEDOT:PSS), Photoactive layer (active layer), poly- [(bis- (3'- (N, N- dimethyl)-methyl ammonium-propyl) -2,7- fluorenes of 9,9-) -2,7- (9,9- dioctyl)] dibrominated ammonium (PFN-Br) and aluminium (Al) cathode.
Photoactive layer material is body phase material of the present invention and classical polymer donor material and fullerene acceptor material Material is blended；
Further, the polymer donor material is PBDB-T, and fullerene acceptor material is PC60BM。
AH- D-A and AH-D-AHType small molecule photovoltaic body phase material and PBDB-T electron donor material and PC60BM electronics by Body material is that 0.0125:1:1 is blended by weight.The highest energy of this kind of organic solar batteries containing body phase material is converted After efficiency is promoted by 6% to 7.51%, and device places 120h, the energy conversion efficiency of device is still maintained at 6.0%.It realizes The Synchronous lifting of device energy conversion efficiency and stability.
It is preferred embodiment that the small molecule photovoltaic body phase material that 0.0125 is blended mass values, which is added, lower than the content or is higher than The content will lead to effect reduction.
Compared with prior art, the invention has the benefit that
The present invention passes through rhodanine hydrogen supply-receptor (AH) building unit have AH- D-A and AH-D-AHThe small molecule light of type The advantages of underlying mass phase material, is:
(1) have one or two for hydrogen group, one or two hydrogen bond can be formed with to/acceptor material respectively；(2) With A-D-A framework, rhodanine is used as hydrogen supply unit and receptor unit simultaneously, and material has higher molar absorption coefficient, for width Band gap material；(3) advantage of three components and conventional additive is combined, can both promote the efficiency of device, while can lead to It crosses H key and intermolecular D-A acts on being formed " pattern lock ", promote device stability.(4) have and traditional fullerene-based material The energy level and spectrum matched, can be widely applied to the organic solar batteries based on fullerene.(5) by introducing different length The dissolubility and electron orbit energy level that molecule is effectively adjusted with the alkyl chain of type, to widen the application range of such material.
Detailed description of the invention
Fig. 1 is uv-visible absorption spectra of the H-TRC8 of the present invention in chlorobenzene solution and solid film；
Fig. 2 is H-TRC8 of the present invention in chlorobenzene solution, chloroformic solution, in tetrahydrofuran solution and methanol solution it is ultraviolet- Visible absorption spectra；
Fig. 3 is the cyclic voltammetry curve of H-TRC8 solid film of the present invention；
Fig. 4 is the thermal gravimetric analysis curve of H-TRC8 of the present invention；
Fig. 5 is the present invention in H-TRC8 and PBTB-T and PC60BM mixed proportion is 0.0125:1:1 (w/w, 10mg/mL), Chlorobenzene is solvent, when adding 1%DIO, the J-V curve of photovoltaic device；
Fig. 6 is the present invention in H-TRC8 and PBTB-T and PC60BM mixed proportion is 0.0125:1:1 (w/w, 10mg/mL), Chlorobenzene is solvent, when adding 1%1,8- diiodo-octane (DIO), active layer EQE curve；
Fig. 7 is the present invention in H-TRC8 and PBTB-T and PC60BM mixed proportion is 0:1:1 (w/w, 10mg/mL), and chlorobenzene is When solvent, the AFM of photoactive layer schemes；
Fig. 8 is the present invention in H-TRC8 and PBTB-T and PC60BM mixed proportion is 0.0125:1:1 (w/w, 10mg/mL), When chlorobenzene is solvent, the AFM figure of photoactive layer.
Specific embodiment
Below by specific embodiment, the invention will be further described, but these specific embodiments are not in any way It limits the scope of the invention.
Embodiment 1
The synthesis of H-TRC8 (M1)
(1) synthesis of 2,5- dicarbaldehyde thiophene
By thiophene (2.52g, 30mmol), tetramethylethylenediamine (10.44g, 90mmol) be added to 250mL it is anhydrous just oneself In alkane, N2It is placed in -30 DEG C cooling 20min under protection, is slowly added dropwise n-BuLi (36mL, 90mmol), after low-temp reaction 1h Flow back 1.5h.Then reaction flask is placed in again in -30 DEG C cooling 20min, anhydrous THF (40mL) and anhydrous DMF is added (10.95g, 150mmol) stops reaction after 12h is stirred at room temperature.Methylene chloride extracts (30mLx3), merges organic layer solution, Washing, dries, filters, distilling off solvent, residue, by column chromatography for separation, obtains light using PE:DCM=2:1 as eluant, eluent Yellow solid (1.98g, 47%).1H NMR(300MHz,CDCl3):δ(ppm)10.05(s,1H),7.85(s, 1H).
(2) synthesis of 3- octyl rhodanine
By 1- bromooctane (3.86g, 20mmol), rhodanine (21.28g, 160mmol), tetramethylethylenediamine (16.24g, It 140mmol) is added sequentially in the two-mouth bottle of 500mL with anhydrous DMF (200mL), stops instead after 16h is stirred to react at 75 DEG C It answers.Reaction solution is cooling, is extracted with dichloromethane (30mLx3), merges organic layer solution, and washing is dried, filtered, distilled out molten Agent, residue is using PE:DCM=2:1 as eluant, eluent, by column chromatography for separation, obtain olive drab(O.D) oily liquids (1.40g, 28.6%).1H NMR(300MHz,CDCl3):δ(ppm)4.03–3.91(m,4H),1.72–1.60(m,2H),1.35–1.22 (m,10H),0.94–0.80(m,3H).
(3) synthesis of 5- (3- octyl rhodanine) -2- formaldehyde thiophene
By 2,5- dicarbaldehyde thiophene (280mg, 2mmol), 3- octyl rhodanine (220mg, 1.8mmol) and 30mL trichlorine Methane is added sequentially in 100mL there-necked flask, N2It is placed under protection at 45 DEG C after being stirred to react 20h and stops reaction.By reaction solution It is cooling, it is extracted with dichloromethane (30mLx3), merges organic layer solution, washing dries, filters, distilling off solvent, residue Using PE:DCM=3:1 as eluant, eluent, by column chromatography for separation, bright yellow solid (183mg, 27.7%) is obtained.1H NMR (400MHz,CDCl3): δ (ppm) 9.97 (s, 1H), 7.84 (s, 1H), 7.80 (d, J=3.9Hz, 1H), 7.45 (d, J= 4.0Hz, 1H), 4.19-3.98 (m, 2H), 1.70 (m, J=7.3Hz, 2H), 1.38-1.22 (m, 10H), 0.96-0.78 (m, 3H).
(4) synthesis of H-TRC8 (M1)
By 5- (3- octyl rhodanine) -2- formaldehyde thiophene (180mg, 0.49mmol), rhodanine (97mg, 0.73mmol) It is added sequentially in 50mL there-necked flask.Chloroform (30mL) and DMF (5mL), N is added2Protection, after three drop triethylamines are added It is placed at 70 DEG C and reacts 12h.It is after reaction stops, reaction solution is cooling, it is extracted with dichloromethane (30mLx3), merges organic layer Solution, washing, dries, filters, distilling off solvent, and residue, by column chromatography for separation, it is solid to obtain peony using DCM as eluant, eluent Body (100mg, 42.2%).1H NMR(400MHz,DMSO-d6):δ(ppm)13.96(s,1H), 8.06(s,1H),7.91(s, 1H), 7.81 (d, J=11.5Hz, 2H), 4.00 (m, 2H), 1.63 (m, 2H), 1.26 (m, J=13.0 Hz, 10H), 0.86 (m, 3H).
Embodiment 2
A based on rhodanineH- D-A or AH-D-AHThe performance characterization and its solar battery of the photovoltaic body phase material of configuration The production and performance test of device.
1H-NMR and13C-NMR spectrum passes through Bruker Dex-300NMR and Bruker Dex-400NMR Instrument measuring, Uv-visible absorption spectra is measured by HP-8453 ultraviolet-visible spectrometer.
A based on rhodanineH- D-A or AH-D-AHThe production of the solar cell device of the photovoltaic body phase material of configuration is adopted With formal structure, structure be Glass/ITO/PEDOT:PSS (40nm)/active layer (90nm)/PFN-Br (5nm)/ Al(100nm).Including conductive glass electrode, indium tin oxide target (ITO), PEDOT:PSS, photoactive layer, PFN-Br and aluminium cathode. It is made according to common process.
Wherein, photoactive layers material is photovoltaic body phase material of the present invention, PBDB-T polymer donor material and richness Alkene acceptor material is strangled, blending weight ratio is 0.0125:1:1.
The preparation method of photoactive layers material are as follows: by H-TRC8, PBDB-T, PC60BM is mixed by the mass ratio of 0.0125:1:1 After conjunction, it is configured to the solution that concentration is 10mg/mL with chlorobenzene, the DIO of 1% volume ratio, heating stirring 12h are added into solution Afterwards, it is spin-coated on the PEDOT:PSS layer prepared with the revolving speed room temperature of 3000rpm, to obtain the active layer of about 90nm thickness.
Embodiment 3
The optical physics of H-TRC8 (M1), electrochemistry and its solar cell device performance
Uv-visible absorption spectra of the H-TRC8 in chlorobenzene solution is as shown in Figure 1.
H-TRC8 body phase material is in 250-550nm and shows strong absorption, and wherein the absorption peak of 360nm or so is point The electron transition absorption peak of the π-π * of son, the absorption peak of 504nm or so are electricity of the donor monomer thiophene to receptor unit rhodanine Lotus shifts (ICT) transition absorption peak.
Uv-visible absorption spectra of the H-TRC8 in solid film is as shown in Figure 1.Compared with the absorption spectrum of solution, light The peak type of spectrogram is not much different, but absorption peak has obvious red shift, and the optical band gap for calculating the material is 2.09eV.
H-TRC8 is in chlorobenzene solution, chloroformic solution, the uv-visible absorption spectra in tetrahydrofuran solution or methanol solution As shown in Figure 2.In different solvents, there is certain movement in the absorption region of H-TRC8, this is attributed to solvation effect Influence
Cyclic voltammetry curve of the H-TRC8 in solid film is as shown in figure 3, present reversible reduction peak.It is calculated by figure The HOMO energy level of the material is -5.88eV out.It is -3.64eV by the lumo energy that the material is calculated in reduction peak.
The thermogravimetric curve of H-TRC8 is as shown in Figure 4.Thermal decomposition temperature when its thermal weight loss 5% is 340 DEG C.
In H-TRC8 and PBTB-T and PC60BM mixed proportion is 0.0125:1:1 (w/w, 10mg/mL), and chlorobenzene is solvent, When adding 1%DIO, the J-V curve of photovoltaic device is as shown in Figure 5.
In H-TRC8 and PBTB-T and PC60BM mixed proportion is 0.0125:1:1 (w/w, 10mg/mL), and chlorobenzene is solvent, When adding 1%DIO, the EQE curve of photovoltaic device is as shown in Figure 6.
When the mass ratio of PBDB-T and PC60BM and body phase material (H-TRC8) are 1:1:0.0125, organic solar The highest energy transfer efficiency of battery is 7.51%, and after device, which heats, places 120h, the energy conversion efficiency of device is still maintained 5.0% or more.It is synchronous to illustrate that the energy conversion efficiency that body phase material device prepared by the present invention is added is realized with stability It is promoted.
And other components are constant, difference is not only that not plus the organic solar batteries of body phase material, highest energy conversion effect Rate is only 6.5% or so.Its energy conversion efficiency is substantially less than the present invention.
In H-TRC8 and PBTB-T and PC60BM mixed proportion is 0:1:1 (w/w, 10mg/mL), living when chlorobenzene is solvent Property layer AFM figure it is as shown in Figure 7.Its roughness is 2.55nm
In H-TRC8 and PBTB-T and PC60BM mixed proportion is 0.0125:1:1 (w/w, 10mg/mL), and chlorobenzene is solvent When, the AFM figure of active layer is as shown in Figure 8.Its roughness is 1.99nm
Active layer after joined H-TRC8 body phase material is demonstrated after comparison roughness becomes more smooth, is more advantageous to Charge transmission
Despite the incorporation of preferred embodiment, the present invention is described, but the present invention is not limited to the above embodiments, It should be understood that appended claims summarise the scope of the present invention.Under the guidance of present inventive concept, those skilled in the art It will be appreciated that certain change that various embodiments of the present invention scheme is carried out, it all will be by claims of the present invention Spirit and scope covered.

Claims (4)

1. the A based on rhodanineH- D-A or AH-D-AHSmall molecule photovoltaic body phase material, it is characterised in that: the small molecule light The structural formula of underlying mass phase material is AH- D-A or AH-D-AHType；
Wherein AHFor the hydrogen supply based on rhodanine-electron acceptor unit, structural formula is
A is 3- alkyl rhodanine, structural formula are as follows:R2Selected from C2-C16One kind of alkyl；
D is center core electron unit, and D is one of following structural formula:
R1Selected from C2-C16Alkyl or one of alkoxy or alkylthio group.
2. the A based on rhodanineH- D-A or AH-D-AHSmall molecule photovoltaic body phase material is in organic solar batteries photoactive layer Application, it is characterised in that: the AH- D-A or AH-D-AHSmall molecule photovoltaic body phase material and polymer-electronics donor material, Fullerene electron acceptor material is blended, and prepares the photoactive layer of organic solar batteries, is used for organic solar batteries.
3. according to claim 2 based on the A of rhodanineH- D-A or AH-D-AHThe application of small molecule photovoltaic body phase material, Be characterized in that: the electron donor material is PBDB-T, and the fullerene electron acceptor material is PC60BM。
4. according to claim 3 based on the A of rhodanineH- D-A or AH-D-AHThe application of small molecule photovoltaic body phase material, It is characterized in that: by AH- D-A or AH-D-AHSmall molecule photovoltaic body phase material and PBDB-T and PC60When BM material is blended, weight ratio is 0.0125:1:1。
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