{"id":2978,"date":"2026-07-03T02:33:10","date_gmt":"2026-07-03T02:33:10","guid":{"rendered":"https:\/\/www.thefullerene.com\/?p=2978"},"modified":"2026-07-08T06:28:19","modified_gmt":"2026-07-08T06:28:19","slug":"uses-of-fullerene-c70","status":"publish","type":"post","link":"https:\/\/www.thefullerene.com\/ja\/uses-of-fullerene-c70\/","title":{"rendered":"\u30d5\u30e9\u30fc\u30ec\u30f3C70\u306e\u7528\u9014\u3068\u306f\uff1fOPV\u3001\u30a8\u30ec\u30af\u30c8\u30ed\u30cb\u30af\u30b9\u3001\u5148\u7aef\u6750\u6599\u306b\u304a\u3051\u308b\u5fc5\u9808\u30ac\u30a4\u30c9"},"content":{"rendered":"\n

Fullerene C70<\/a> uses<\/strong> are closely connected to its elongated carbon cage structure, electron-accepting behavior, optical absorption, and role in advanced material research. Compared with Fullerene C60<\/a>, C70 contains 70 carbon atoms rather than 60, giving it a less symmetrical and more elongated molecular geometry. This structural difference leads to different electronic and optical behavior, which is why Fullerene C70<\/a> is studied in organic photovoltaics, organic electronics, molecular electronics, photodynamic research, sensors, coatings, and advanced nanomaterials.<\/p>\n\n\n\n

Fullerene C70 is also known as C70 fullerene, Carbon 70, or Fullerene C\u2087\u2080. Its molecular formula is C70, its CAS number is 115383-22-7, and its molecular weight is approximately 840.7\u2013840.8 g\/mol.[1]<\/a><\/sup>[2]<\/a><\/sup><\/p>\n\n\n\n

This article explains the main uses of Fullerene C70, why it is different from C60, which applications are most relevant today, and what researchers should consider before selecting C70 for a project.<\/p>\n\n\n\n

\"Fullerene
Fullerene C70 uses in organic photovoltaics and advanced materials<\/figcaption><\/figure>\n\n\n\n

What Is Fullerene C70?<\/h2>\n\n\n\n

Fullerene C70 is a carbon cage molecule composed of 70 carbon atoms. Like C60, it belongs to the fullerene family, a class of closed-cage carbon molecules with distinctive electronic, optical, and molecular properties. However, C70 is not simply a larger version of C60. Its elongated, rugby-ball-like geometry gives it different symmetry and different light absorption behavior.<\/p>\n\n\n\n

This difference matters in material science<\/a>. In organic electronic systems, molecular shape can affect packing, film morphology, charge transport, energy levels, optical absorption, and interaction with donor materials. C70 and its derivatives may therefore be selected when researchers want to study a fullerene acceptor with different optical or electronic characteristics from C60.<\/p>\n\n\n\n

Property<\/th>Fullerene C70<\/th><\/tr><\/thead>
Molecular formula<\/td>C70<\/td><\/tr>
CAS number<\/td>115383-22-7<\/td><\/tr>
Molecular weight<\/td>Approximately 840.7\u2013840.8 g\/mol<\/td><\/tr>
Structure<\/td>Elongated carbon cage molecule<\/td><\/tr>
Common form<\/td>Fine powder or yellow-brown to black crystals with metallic luster<\/td><\/tr>
Typical research areas<\/td>Organic photovoltaics, organic electronics, photodynamic research, sensors, advanced materials<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
\"Fullerene
Fullerene C60 and Fullerene C70 molecular structure comparison<\/figcaption><\/figure>\n\n\n\n

Why Fullerene C70 Is Used in Organic Photovoltaics<\/h2>\n\n\n\n

Organic photovoltaics, or OPVs, are among the most important research areas for Fullerene C70 and C70 derivatives. In OPV devices, fullerene materials may act as electron acceptors or electron-transporting components. Their role is to accept electrons from donor materials and support charge separation and transport inside the solar cell active layer.<\/p>\n\n\n\n

C70-based materials are especially interesting because they can absorb light differently from C60. PC70BM, a soluble C70 derivative, has been reported to show stronger and broader absorption in the visible range than PC60BM in certain polymer solar cell systems.[3]<\/a><\/sup> This is one reason C70 derivatives have been studied in OPV blends where light absorption and photocurrent are important design factors.<\/p>\n\n\n\n

In early organic solar cell research, fullerene acceptors such as PC61BM and PC71BM became important because they combined electron-accepting behavior with solution processability. Although non-fullerene acceptors now dominate many high-efficiency OPV systems, C70 and C70 derivatives remain relevant in research as reference acceptors, electron-transport materials, morphology modifiers, and components in comparative studies.<\/p>\n\n\n\n

The correct statement is not that C70 is always better than C60 in solar cells. Device performance depends on donor material, acceptor derivative, solvent system, film morphology, layer thickness, processing method, interface layers, and stability. C70 may be useful when its absorption and electronic behavior match the device design.<\/p>\n\n\n\n

Fullerene C70 in Organic Electronics and Semiconductor Research<\/h2>\n\n\n\n

Fullerene C70 is also studied in organic electronics and semiconductor research. Its electron-accepting nature makes it relevant to thin-film devices, organic field-effect transistors, molecular electronics, photodetectors, and optoelectronic material systems.<\/p>\n\n\n\n

Some supplier and technical references describe C70 as an n-channel organic semiconductor and electron acceptor with strong UV absorption and moderate visible absorption.[4]<\/a><\/sup> In practical research, this means C70 may be evaluated in systems where electron transport, charge separation, or photophysical response are important.<\/p>\n\n\n\n

Researchers may compare C70 with C60, PCBM derivatives, non-fullerene acceptors, or other organic semiconductors<\/a> to understand how molecular structure influences electronic behavior. Because C70 has lower symmetry than C60, it may produce different spectroscopic signatures and charge-transfer behavior in polymer-fullerene blends. Studies on C70 derivatives in polymer-fullerene systems have reported characteristic signatures of C70 radical anions in photoinduced charge-transfer processes.[5]<\/a><\/sup><\/p>\n\n\n\n

For electronics buyers, the important point is that C70 is a precision research material, not a generic carbon powder. Purity, batch consistency, impurity control, storage, and processing conditions can matter when C70 is used in sensitive thin-film or semiconductor-related studies.<\/p>\n\n\n\n

\"Fullerene
Fullerene C70 acceptor material in organic photovoltaic research<\/figcaption><\/figure>\n\n\n\n

Fullerene C70 in Molecular Electronics<\/h2>\n\n\n\n

Molecular electronics studies charge transport through molecules or molecular assemblies. Fullerene C70 may be relevant because fullerenes can accept electrons, participate in charge-transfer states, and interact with other organic or inorganic electronic materials.<\/p>\n\n\n\n

In molecular electronic research, C70 may be evaluated as part of donor-acceptor systems, charge-transfer complexes, molecular junction concepts, or hybrid nanostructures. Its extended carbon cage and distinctive electronic structure make it useful for comparing how different fullerene geometries affect molecular-scale electronic behavior.<\/p>\n\n\n\n

This field remains highly research-oriented. C70 should not be described as a finished electronic component by itself. Its value depends on how it is integrated into a device architecture, thin film, molecular assembly, electrode interface, or blended semiconductor system.<\/p>\n\n\n\n

Fullerene C70 in Photodynamic and Photosensitizer Research<\/h2>\n\n\n\n

Fullerene C70 is also investigated in photodynamic and photosensitizer research. Fullerenes can absorb light and participate in photoinduced processes that generate reactive oxygen species under defined experimental conditions. Reviews on fullerene photosensitizers discuss both C60 and C70 in photodynamic research contexts.[6]<\/a><\/sup><\/p>\n\n\n\n

This area requires careful language. C70 should be described as a material studied in photodynamic research, not as an approved therapy or ready-to-use medical product. Photodynamic behavior depends on molecular structure, functionalization, solubility, aggregation state, light wavelength, oxygen conditions, concentration, and the experimental model used.<\/p>\n\n\n\n

Pristine C70 has limited water solubility, so many biomedical or photodynamic studies focus on derivatives or formulated systems rather than raw C70 powder. Any medical, therapeutic, antimicrobial, or clinical claim requires product-specific evidence and regulatory review. Without that evidence, the correct wording is \u201cstudied,\u201d \u201cinvestigated,\u201d or \u201cexplored in laboratory research.\u201d<\/p>\n\n\n\n

\"Fullerene
Fullerene C70 photodynamic research model in laboratory conditions<\/figcaption><\/figure>\n\n\n\n

Fullerene C70 in Sensors and Analytical Research<\/h2>\n\n\n\n

C70 may also appear in sensor and analytical research because of its electron-accepting behavior, electrochemical properties, photophysical activity, and ability to interact with other nanomaterials. Researchers may study C70 in modified electrodes, photoresponsive systems, electrochemical platforms, or hybrid nanomaterial assemblies.<\/p>\n\n\n\n

In these contexts, C70 is rarely used alone. It is often combined with polymers, metal oxides, carbon nanotubes, graphene-like materials, electrodes, or molecular receptors. The fullerene may contribute to charge transfer, electron mediation, surface interaction, or signal response depending on the system design.<\/p>\n\n\n\n

Sensor applications are therefore highly formulation- and architecture-dependent. It is not accurate to claim that C70 universally improves sensor performance. A better statement is that C70 may be investigated as an electron-accepting or photoactive component in sensor-related material research.<\/p>\n\n\n\n

Fullerene C70 in Advanced Materials and Nanocomposites<\/h2>\n\n\n\n

Fullerene C70 may be studied as a component in advanced materials and nanocomposites. Its carbon cage structure makes it relevant to polymer blends, coatings, thin films, and hybrid nanomaterial systems where electronic, optical, or surface properties are being explored.<\/p>\n\n\n\n

In polymer systems, C70 may be evaluated for how it affects film morphology, charge transport, light absorption, thermal behavior, or mechanical response. In coatings, it may be studied as part of surface-modification or functional nanomaterial research. In hybrid nanomaterials, C70 may be combined with other carbon materials to examine charge-transfer or optical behavior.<\/p>\n\n\n\n

These applications are not automatic. C70 dispersion, compatibility, solvent selection, aggregation behavior, concentration, and processing method all influence the final material. Because C70 is not water-soluble and is typically handled in selected organic solvent systems, formulators must test compatibility rather than assume performance.<\/p>\n\n\n\n

C70 vs C60: Which Fullerene Should Researchers Choose?<\/h2>\n\n\n\n

C60 and C70 are both important fullerene materials, but they are not interchangeable in every application. C60 has a highly symmetrical spherical structure. C70 has a more elongated cage and different optical and electronic behavior.<\/p>\n\n\n\n

C60 is more widely used across general fullerene research, lubricant additives, coatings, perovskite solar cells, organic electronics, and formulation studies. C70 is often considered when researchers need stronger visible absorption, different fullerene geometry, or a comparison material for OPV and organic electronic systems.<\/p>\n\n\n\n

Selection Factor<\/th>Fullerene C60<\/th>Fullerene C70<\/th><\/tr><\/thead>
Carbon atoms<\/td>60<\/td>70<\/td><\/tr>
Molecular shape<\/td>Highly symmetrical spherical cage<\/td>More elongated carbon cage<\/td><\/tr>
Common research role<\/td>Broad fullerene research, ETL materials, coatings, lubricants, organic electronics<\/td>OPV, organic electronics, photophysical research, advanced material comparison<\/td><\/tr>
Optical behavior<\/td>Different absorption profile<\/td>Often studied for stronger or broader visible absorption in derivative systems<\/td><\/tr>
Availability<\/td>Generally more common<\/td>Often more specialized<\/td><\/tr>
Selection rule<\/td>Good starting point for many fullerene applications<\/td>Useful when C70-specific optical or electronic behavior is needed<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Researchers should not assume that C70 is universally superior to C60. The better choice depends on the application, device architecture, formulation system, purity requirement, processing method, and target performance property.<\/p>\n\n\n\n

Limitations of Fullerene C70<\/h2>\n\n\n\n

Although Fullerene C70 is valuable in advanced research, it also has limitations. These limitations should be considered before selecting it for a project.<\/p>\n\n\n\n

First, C70 can be more specialized and less widely available than C60. This may affect price, lead time, and batch availability.<\/p>\n\n\n\n

Second, C70 is insoluble in water and typically requires selected organic solvent systems such as toluene, chlorobenzene, or carbon disulfide for research handling. Solvent compatibility must be evaluated based on the intended system.<\/p>\n\n\n\n

Third, C70 performance depends strongly on formulation and device context. In OPV, electronics, sensors, or coatings, results may vary depending on concentration, film morphology, interface design, processing conditions, and purity.<\/p>\n\n\n\n

Fourth, biomedical or photodynamic research requires careful safety and regulatory framing. Raw C70 should not be described as a medical product, clinical material, or therapeutic agent unless supported by verified product-level and regulatory documentation.<\/p>\n\n\n\n

Finally, C70 should be stored and handled properly. Fullerene C70 should be kept in a sealed container in a cool, dry place away from light. Buyers should review the applicable MSDS\/SDS and follow laboratory safety procedures before use.<\/p>\n\n\n\n

What Buyers Should Consider When Sourcing Fullerene C70<\/h2>\n\n\n\n

For researchers and technical buyers, the first step is to define the application. C70 for organic photovoltaics, C70 for thin-film electronics, C70 for photodynamic research, and C70 for advanced coatings may require different purity expectations and handling procedures.<\/p>\n\n\n\n

Buyers should confirm product identity, CAS number, molecular formula, purity grade, batch-specific COA, MSDS\/SDS, packaging, storage conditions, and available quantity before ordering. For sensitive electronic, photovoltaic, or advanced material systems, higher purity and batch consistency may be important for reproducibility.<\/p>\n\n\n\n

Fullerene C70 prices vary depending on purity, quantity, batch availability, documentation requirements, packaging, destination country, and international shipping conditions. Buyers should request a formal quotation based on their target purity, quantity, application, destination country, and required documents.<\/p>\n\n\n\n

For general research reference, you may review Fullerene C70 product information<\/a>, compare related Fullerene C60 specifications<\/a>, or contact The Fullerene<\/a> to discuss material identity, purity options, sample availability, and documentation requirements.<\/p>\n\n\n\n

Practical Summary: Main Uses of Fullerene C70<\/h2>\n\n\n\n

The main uses of Fullerene C70 are concentrated in research and advanced material development rather than mass-market consumer applications. The most relevant areas include organic photovoltaics, organic electronics, molecular electronics, photodynamic research, sensors, coatings, polymer nanocomposites, and comparative fullerene studies.<\/p>\n\n\n\n

C70 is most useful when its elongated fullerene cage, visible-light absorption behavior, electron-accepting character, or C70-specific photophysical properties are relevant to the research question. It is less suitable when the project only needs a general fullerene material and does not require C70-specific behavior.<\/p>\n\n\n\n

For B2B buyers, the correct approach is to connect C70 selection with the actual application: device architecture, formulation system, test protocol, purity requirement, and documentation needs. That is the difference between selecting C70 as a research tool and treating it as a generic carbon material.<\/p>\n\n\n\n

FAQ<\/h2>\n\n\n\n

What is Fullerene C70 used for?<\/h3>\n\n\n\n

Fullerene C70 is used mainly in research related to organic photovoltaics, organic electronics, molecular electronics, photodynamic studies, sensors, coatings, nanocomposites, and advanced material systems.<\/p>\n\n\n\n

Why is C70 used in organic photovoltaics?<\/h3>\n\n\n\n

C70 and C70 derivatives are studied in organic photovoltaics because they can act as electron acceptors and may show stronger or broader visible absorption than C60-based materials in some systems. Device performance still depends on the full material system and processing method.<\/p>\n\n\n\n

Is Fullerene C70 better than Fullerene C60<\/a>?<\/h3>\n\n\n\n

No. C70 is not universally better than C60. C70 has a more elongated structure and different optical and electronic behavior, while C60 is more widely used in many fullerene applications. Selection depends on the application and test requirements.<\/p>\n\n\n\n

What is the difference between C70 and PC71BM?<\/h3>\n\n\n\n

C70 is the pristine 70-carbon fullerene molecule. PC71BM is a soluble C70 derivative designed for easier solution processing in organic photovoltaic and organic electronic research.<\/p>\n\n\n\n

Can Fullerene C70 be used in biomedical research?<\/h3>\n\n\n\n

Fullerene C70 and C70 derivatives may be investigated in photodynamic or biomedical-related laboratory research. They should not be described as approved medical products, therapies, or clinically validated materials unless specific regulatory evidence is available.<\/p>\n\n\n\n

Is Fullerene C70 water-soluble?<\/h3>\n\n\n\n

Pristine Fullerene C70 is generally insoluble in water. It is typically dissolved in selected organic solvents such as toluene, chlorobenzene, or carbon disulfide for research handling.<\/p>\n\n\n\n

What purity of Fullerene C70 should buyers choose?<\/h3>\n\n\n\n

The right purity depends on the application. Exploratory studies may begin with standard purity grades, while sensitive organic electronics, photovoltaic, or advanced material research may require higher purity and stronger batch consistency.<\/p>\n\n\n\n

What documents should buyers request for Fullerene C70?<\/h3>\n\n\n\n

Buyers should request batch-specific COA, MSDS\/SDS, product specification, packaging information, and storage recommendations before ordering Fullerene C70 for research or industrial evaluation.<\/p>\n\n\n\n

References<\/h2>\n\n\n\n

[1] PubChem, \u201cFullerene-C70.\u201d PubChem provides chemical identity data for Fullerene C70, including molecular formula and molecular weight. Source<\/a><\/p>\n\n\n\n

[2] NIST Chemistry WebBook, \u201cc70-Fullerene.\u201d NIST lists C70 fullerene with formula C70, molecular weight 840.7490, and CAS Registry Number 115383-22-7. Source<\/a><\/p>\n\n\n\n

[3] F. Zhang et al., \u201cInfluence of PC60BM or PC70BM as electron acceptor on the performance of polymer solar cells,\u201d Solar Energy Materials and Solar Cells<\/em>, 2012. The study reports that PC70BM-based systems can show relatively strong and broad absorption in the visible range under the tested conditions. Source<\/a><\/p>\n\n\n\n

[4] Sigma-Aldrich, \u201c[5,6]-Fullerene-C70.\u201d The material description identifies C70 as an electron acceptor with strong UV absorption, moderate visible absorption, and n-channel organic semiconductor relevance. Source<\/a><\/p>\n\n\n\n

[5] A. Sperlich et al., \u201cPhotoinduced C70 radical anions in polymer:fullerene blends,\u201d arXiv record, 2011. The study discusses spectroscopic signatures associated with C70 derivatives in polymer-fullerene blends. Source<\/a><\/p>\n\n\n\n

[6] Y. Yamakoshi, \u201cFullerenes (C60, C70) as Photosensitizers for PDT,\u201d 2023. The chapter discusses C60 and C70 in photosensitizer and photodynamic research contexts. Source<\/a><\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Fullerene C70 uses are closely connected to its elongated carbon cage structure, electron-accepting behavior, optical absorption, and role in advanced material research. Compared with Fullerene C60, C70 contains 70 carbon atoms rather than 60, giving it a less symmetrical and more elongated molecular geometry. This structural difference leads to different electronic and optical behavior, which is why Fullerene C70 is studied in organic photovoltaics, organic electronics, molecular electronics, photodynamic research, sensors, coatings, and advanced nanomaterials. Fullerene C70 is also known as C70 fullerene, Carbon 70, or Fullerene C\u2087\u2080. Its molecular formula is C70, its CAS number is 115383-22-7, and its molecular weight is approximately 840.7\u2013840.8 g\/mol.[1][2] This article explains the […]<\/p>\n","protected":false},"author":1,"featured_media":2979,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_gspb_post_css":"","footnotes":""},"categories":[46],"tags":[115],"class_list":["post-2978","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","tag-buckminsterfullerene-c70"],"blocksy_meta":[],"acf":[],"_links":{"self":[{"href":"https:\/\/www.thefullerene.com\/ja\/wp-json\/wp\/v2\/posts\/2978","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.thefullerene.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.thefullerene.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.thefullerene.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.thefullerene.com\/ja\/wp-json\/wp\/v2\/comments?post=2978"}],"version-history":[{"count":4,"href":"https:\/\/www.thefullerene.com\/ja\/wp-json\/wp\/v2\/posts\/2978\/revisions"}],"predecessor-version":[{"id":3041,"href":"https:\/\/www.thefullerene.com\/ja\/wp-json\/wp\/v2\/posts\/2978\/revisions\/3041"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.thefullerene.com\/ja\/wp-json\/wp\/v2\/media\/2979"}],"wp:attachment":[{"href":"https:\/\/www.thefullerene.com\/ja\/wp-json\/wp\/v2\/media?parent=2978"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.thefullerene.com\/ja\/wp-json\/wp\/v2\/categories?post=2978"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.thefullerene.com\/ja\/wp-json\/wp\/v2\/tags?post=2978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}