Transferfree graphene electrodes for superflexible and semi. Aside from the two electrodes, traditional organic solar cells contain an active pedot. Ndoped graphene nanoplatelets as superior metalfree. Doped graphene electrodes for organic solar cells hyesung park, jill a rowehl, ki kang kim et al. Metal electrode free windowlike organic solar cells with p doped carbon nanotube thinfilm electrodes il jeon1, clement delacou2, antti kaskela3, esko i. In the present work, by using a polymer free transfer method with an in situ doping process for graphene top electrodes, we demonstrate the. Graphene as a transparent electrode for amorphous siliconbased. Pdf the application of highly doped singlelayer graphene. Metalelectrodefree windowlike organic solar cells with p. Opvs generally consist of a charge donor layer, a charge acceptor layer, and two electrodes for charge. Counter electrodes from conducting polymer intercalated. For amorphous silicon photovoltaics, we have identified a useful case with a.
Development of annealingfree, solutionprocessable inverted. Semitransparent flexible organic solar cells employing doped. The role of graphene and other 2d materials in solar photovoltaics. Metalelectrodefree windowlike organic solar cells with. Metal electrodefree windowlike organic solar cells with p doped carbon nanotube thinfilm electrodes il jeon1, clement delacou2, antti kaskela3, esko i. N doped graphene was also studied as the counter electrode of dsscs 79,80. The resultant ngnp was deposited on fluorine doped sno2 ftoglass substrates by using electrospray espray coating, and their. Mar 01, 2018 on the contrary, the cellulose graphene electrode provides opaque solar cells and its bulk conductivity allows an easy electrical contact. Applications of carbon nanotubes and graphene for third. Pss layer and a donoracceptor blend layer commonly composed of p3ht or fullerenes or both. Pcbm bulkheterojunction cell with electrostatically doped graphene electrode used in our measurements is shown in figure 1a. Graphene anode for indiumtin oxide free organic lightemitting diodes. The graphene in the electrode becomes an organicinorganic hybrid material after it. Osa graphenebased functional materials for organic solar cells.
The application of graphene in solar cells has been carried out since the onset of graphene related research, but graphene was mostly applied in transparent conductive films in organic solar cells. Transparent conductive oxides tco are doped metal oxides used in optoelectronic devices such as flat panel displays and photovoltaics including inorganic devices, organic devices, and dyesensitized solar cells. Typically, these applications use electrode materials that have greater than 80%. Hyesung park 1, jill a rowehl 2, ki kang kim 1, vladimir bulovic 1 and jing kong 1. Doped and textured graphene as electrode for organic solar. Published 23 november 2010 iop publishing ltd nanotechnology, volume 21, number 50. Materials free fulltext graphene and carbonnanotubebased. Organic photovoltaic opv devices hold remarkable potential for lowcost, largescale fabrication on flexible substrates, presenting great compatibility with rolltoroll r2r fabrication,, and an impressive short energy payback time of only 6 months, if installed in a pv park in southern europe. It was found that for devices with pristine graphene electrodes, the power conversion efficiency pce is comparable to their counterparts with indium tin oxide ito electrodes.
To date, graphene electrodes have been applied for different types of solar cells. Pdf the application of graphene as electrodes in electrical. Pdf graphene synthesis and application for solar cells. The ptype doped graphene schottky junction solar cells showed efficiency up. Semitransparent flexible photovoltaic cells are advantageous for effective use of solar energy in many areas such as buildingintegrated solar power generation and portable photovoltaic chargers. Doped graphene nanoplatelets as superior metal free counter electrodes for organic dyesensitized solar cells by myung jong ju 1772332, jae cheon kim 1772341, hyunjung choi 275770, in taek choi 1509433, sang gyun kim 1943674, kimin lim 1794760, jaejung ko 1714603, jaejoon lee 1772344, inyup jeon 1595611, jongbeom baek. Doped graphene nanoplatelets as superior metalfree counter. Metal electrode free windowlike organic solar cells with p doped carbon nanotube thinfilm electrodes. Solutionprocessed transparent conducting electrodes for.
Graphene nanoplatelets doped with n at its edges as metal. The devices also show good air stability, indicating that multilayer graphene is a promising environmental barrier. Kauppinen3, shigeo maruyama2,4, and yutaka matsuo1, 1. In bhj devices, the conventional transparent conductive electrode used to couple. Development of annealing free, solutionprocessable inverted organic solar cells with n doped graphene electrodes using zinc oxide nanoparticles. Due to the high transparency of piintegrated graphene electrode and intimate contact between graphene and pi substrate, highefficiency flexible organic solar cell with a pce of 15. Mar 12, 2014 graphene has been employed as transparent electrodes in organic solar cells oscs because of its good physical and optical properties. Gold doped reduced graphene oxide rgo films prepared via hummer method have been utilised as counter electrode of dye. Doped graphene electrodes for organic solar cells hyesung park 1, jill a rowehl2,kikangkim1, vladimir bulovic and jing kong1 1 department of electrical engineering and computer sciences, massachusetts institute of technology, cambridge, ma 029, usa 2 department of materials science and engineering, massachusetts institute of technology. Among the various types of solar cells, organic photovoltaics opvs are known as lightweight, transparent, thin and flexible solutions.
The doping with nitrogen leads to a power conversion efficiency of 7. Ultrathin organic solar cells with graphene doped by. Facile synthesis of nitrogendoped graphene frameworks for. Doping the graphene layers with gold particles has found to increase the efficiency by up to 40%. Pdf doped graphene electrodes for organic solar cells. Nitrogendoped graphene for dyesensitized solar cells and. Request pdf doped and textured graphene as electrode for organic solar cells organic semiconductor solar cells are a promising route to scalable, economically viable, energy conversion. Dsscs based on specific nanoplatelets designated ngnp5 display superior photovoltaic performance power conversion efficiency, 10. Pcbm active ible substrates by solution process and thus are excellent can layers and ito electrodes have pces of 4. Graphene and carbonnanotubebased transparent electrodes for semitransparent solar cells. Jun 01, 2017 pedotdecorated nitrogen doped graphene as the transparent composite film for the counter electrode of a dyesensitized solar cell nano energy, 12 2015, pp. Electrochemical measurements showed that the nitrogendoping process can remarkably improve the catalytic activity of graphene toward triiodide reduction, lower the charge transfer resistance, and thus enhance the corresponding photovoltaic performance. Recent citations highly customizable transparent silver nanowire patterning via inkjetprinted conductive polymer templates formed on various surfaces. Nov 23, 2010 doped graphene electrodes for organic solar cells.
Materials free fulltext graphene and carbonnanotube. Flexible organic solar cells over 15% efficiency with. The hybrid solar cell devices consist of solutionprocessed poly 3,4ethlenedioxythiophene. For successful implementation in these applications, howev er, one major challenge in developing highperformance solar. Transferfree graphene electrodes for superflexible and. Graphene oxidelike materials in organic and perovskite.
Jun 01, 2019 nitrogen doping can increase the catalytic activity of graphene. Review of fabrication methods of largearea transparent graphene. Finally, the 4layer acid doped graphene solar cell exhibited the best. Dark currents of the devices are presented as well. However, the research is still at the early stage and the performance of such devices has not been as good as that of the devices with ito electrodes since the conductivities of graphene electrodes are relatively low. Urea doped zno films as the electron transport layer for high efficiency inverted polymer solar cells. This device has a thickness of less than 5 m, with the spin coated pvdftrfe of 4 m acting both as a doping layer for graphene and a substrate for the device. Nov 01, 2019 solar cell devices with patcvd graphene electrodes demonstrated a pce of 14. Solutionprocessable highquality graphene for organic. The samples were subjected to various annealing times. Bio applications, school of ophthalmology and optometry, wenzhou medical college, 270. Polymeric aciddoped transparent carbon nanotube electrodes. Large area graphene films were produced by chemical vapor deposition on copper foils and transferred onto glass as transparent electrodes. May 15, 20 highly efficient counter electrodes ces for dyesensitized solar cells dsscs were developed using thin films of scalable and highquality, nitrogen doped graphene nanoplatelets ngnp, which was synthesized by a simple twostep reaction sequence.
Since the tfsa hole dopes the graphene electrodes, higher wgr. For example, with graphene silicon solar cells, the highest efficiency obtained is 15. Most of these films are fabricated with polycrystalline or amorphous microstructures. Environmental and economic assessment of itofree electrodes for. Pdf organic solar cells with solutionprocessed graphene. Alternatively, organic and hybrid solar cells have emerged as a.
Introduction organic solar cells oscs have been widely recognized as an important energyharvesting device because they are lighter, more. Nitrogen doped graphene frameworks ngfs with a large specific surface area 1149 m 2 g. Aug 10, 2012 the sheet resistance of the multilayer graphene films decreased by half after doping while maintaining similar transmittance, thereby enhancing the performance of the solar cells with doped graphene electrodes. Consequently, graphenes free charges are immobile in one spatial. Highly flexible, highperformance perovskite solar cells.
Experimental and numerical studies of graphene electrodes for or. Due to the increased optical absorption, organic solar cells with fourlayer graphene with the same sheet resistance as ito at 30. Pss layer doped with graphene flakes as htl in inverted perovskite solar cells has been scarcely explored yet, despite it has been studied in other fields, such as dye. Graphene oxidebased materials for organic solar cells. Investigation of improvement in stability and power conversion. Solutionprocessed, semitransparent organic photovoltaics. However, the electrical conductivity of graphene films synthesized by chemical vapor deposition cvd is still inferior to that of conventional indium tin oxide ito electrodes of comparable transparency. Ndoped graphene nanoplatelets as superior metalfree counter. Figure 2b presents a schematic of semitransparent organic solar cells with a p doped singlelayer graphene top electrode comprising glassitoznop3ht. Graphene oxidelike materials in organic and perovskite solar. Aug 16, 2016 organic solar cells oscs have attracted much attention compared with other types of solar cell owing to their low cost, high efficiency, and diverse applications 1,2,3. Edgeselenated graphene nanoplatelets as durable metalfree. Jan 24, 2018 urea doped zno films as the electron transport layer for high efficiency inverted polymer solar cells.
May 23, 2018 compared to r sh of the as doped graphene, r sh of pfsa doped graphene on sisio 2 substrate gradually decreased as t a increased up to 22. Pss layer has been replaced by graphene derivatives and are generally used as holetransport layers in organic solar cells. Free flexible organic solar cells with graphene top. The ngfs can be utilized as an excellent counter electrode in hole transport material htm free perovskite solar cells pscs, achieving the power conversion efficiency of 10. In this work graphene sheets grown by chemical vapor deposition cvd with controlled numbers of layers were used as transparent electrodes in organic. Psc devices demonstrated a great flexibility, maintaining 90% of the original pce value after bending cycles under a tensile strain of 1. Graphenebased transparent electrodes for hybrid solar cells. Pc 60 bm bhj solar cells using a pedot doped graphene anode at various doping levels, such astransferred graphene g, pedot doped graphene with light doping g. Doped graphene electrodes for organic solar cells iopscience. Yuhua xue institute of advanced materials for nano. Pdf packagefree flexible organic solar cells with graphene.
Inorganicorganic metal halide perovskite solar cells pscs are attracting great. This work reports the use of solutionprocessed highquality graphene as transparent conductive electrode in an organic solar cell using an electrochemical approach. Organic solar cells using cvdgrown graphene electrodes hobeom kim, sanghoon bae, taehee han et al. Chemical doping and enhanced solar energy conversion of. Transparent electrodes for organic optoelectronic devices. A highly flexible and durable transparent graphene electrode with thermal stability was developed via the direct integration of polyimide pi on graphene. Carbon nanotubes cnts along with reduced graphene oxide rgo are. We report semitransparent and flexible organic solar cells foscs with high aperture, composed of doped graphene layers, zno, p3ht. High efficiency graphene solar cells by chemical doping nano. Pdf in this work graphene sheets grown by chemical vapor deposition cvd with controlled numbers of layers were used as transparent.
The ngfs can be utilized as an excellent counter electrode in hole transport material htm free perovskite solar cells pscs, achieving. The most common electrolytes and ce are iodidetriiodide i. The graphene based transparent and conductive films were demonstrated to be costeffective electrodes working in organic inorganic hybrid schottky solar cells. Nitrogen doped graphene was demonstrated as an efficient and alternative metal free electrocatalyst for dyesensitized solar cells. Fullysprayed flexible polymer solar cells with a cellulose. Highly flexible, highperformance perovskite solar cells with. A substantial amount of attention has been paid to the development of transparent electrodes based on graphene and carbon nanotubes cnts, owing to their exceptional characteristics, such as mechanical and chemical stability, high carrier mobility, high optical transmittance, and high conductivity. Doped graphene nanoplatelets as superior metalfree.
Highly efficient counter electrodes ces for dyesensitized solar cells dsscs were developed using thin films of scalable and highquality, nitrogen doped graphene nanoplatelets ngnp, which was synthesized by a simple twostep reaction sequence. Doped graphene electrodes for organic solar cells nasaads. Graphene synthesis and application for solar cells journal of. We recently reported the semitransparent opvs with synthetic skin, and conformal solar cells for building integra highly doped singlelayer graphene electrodes and showed the tion. Department of chemistry, school of science, the university of tokyo, 731 hongo. Photovoltaic devices, or solar cells, are a means of generating electricity from sunlight in an environmentally friendly manner without emissions. In this work graphene sheets grown by chemical vapor deposition cvd with controlled numbers of layers were used as transparent electrodes in organic photovoltaic opv devices. Flexible organic solar cells with doped graphene electrodes on a plastic substrate retained a power conversion efficiency of 2. Key components of a dyesensitized solar cell dssc are dyecoated titanium dioxide tio 2 as photoanode, electrolyte, and counter electrode ce. Transparent electrodes are vital components for touch panels, displays, and photovoltaic cells.
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