Graphene creates efficient electrodes for solar cells. Nanotube electrodes improve solar cells rice university. Organic photovoltaic opv cells using gmes as the transparent electrodes with a blend of poly3hexylthiophenephenylc 61butyric acid methyl ester p3htpc 61 bm as the active layer. Graphene repels water, so typical procedures for producing an electrode on the surface by depositing the material from a solution wont work. Graphene is transparent, so that electrodes made from it can be applied to the transparent organic solar cells without blocking any of the incoming light. Organic photovoltaic opv cells using gmes as the transparent electrodes with a blend of poly3hexylthiophenephenylc 61butyric acid methyl ester p3htpc 61 bm as the active layer have been fabricated and exhibit a power conversion efficiency pce of 2. Graphene films as transparent electrodes for photovoltaic devices based on cadmium sulfide thin films. Applications of cnts and graphene in organic solar cells. N doped graphene nanoplatelets as superior metal free counter electrodes for organic dyesensitized solar cells article in acs nano 76 may 20 with 191 reads how we measure reads. The supporting information is available free of charge on the acs. Graphene electrodes for applications in display devices. Jing kong department of electrical engineering and computer science, massachusetts institute of technology. Aside from the two electrodes, traditional organic solar cells contain an active pedot. Solutionprocessed graphenebased transparent conductive.
Imagine a future in which solar cells are all around uson windows and walls, cell phones, laptops, and more. Graphene for electrodes in organic solar cells could reduce costs. Small molecular weight organic solar cells can be directly deposited on such graphene anodes. Graphene mesh electrodes gmes with good conductivity and transparency have been fabricated by the standard industrial photolithography and o 2 plasma etching process using graphene solutions. Metalelectrodefree windowlike organic solar cells with.
The graphenebased transparent and conductive films were demonstrated to be costeffective electrodes working in organicinorganic hybrid schottky solar cells. Ndoping of graphene was achieved by annealing mixtures of graphene oxide with urea. Jung s, lee j, seo j, kim u, choi y and park h 2018 development of annealingfree, solutionprocessable inverted organic solar cells with ndoped graphene electrodes using zinc oxide nanoparticles nano lett. H solar cells serving as both pdoped and ndoped layers. Solar cells with allgraphene electrodes are potentially lowcost.
Graphene films were also used as conductive and transparent electrodes to replace ito in organic 14. Graphene has been proposed as a promising transparent conducting electrode material in organic photovoltaic opv solar cells to substitute the widely used indium tin oxide ito. Pss to graphene electrodes in organic solar cells hyesung park, yumeng shi. Graphene electrodes for organic solar cells nanowerk news a promising approach for making solar cells that are inexpensive, lightweight and flexible is to use organic that is, carboncontaining compounds instead of expensive, highly purified silicon.
Solar energy materials and solar cells vol 163, pages 1284 april. Graphene for electrodes in organic solar cells could. Apr 05, 2017 solar cells were encapsulated with a glass substrate in order to successfully integrate the thinfilm graphene lsgmscs onto the device. Macvicar fellow and principal investigator in mtl and rle, have reported a new way to apply graphene electrodes to organic solar cellsbringing the possible wide spread use of carbonbased solar cells much closer to reality. Pdf doped graphene electrodes for organic solar cells. Ju mj1, kim jc, choi hj, choi it, kim sg, lim k, ko j, lee jj, jeon iy, baek jb, kim hk. However, the electrical conductivity of graphene films synthesized by chemical vapor deposition cvd is still inferior to that of conventional. An annealing free process is considered as a technological advancement for the development of flexible or wearable organic electronic devices, which can prevent the distortion of substrates and damage to the active components of the device and simplify the overall fabrication process to increase the industrial applications. Highly efficient counter electrodes ces for dyesensitized solar cells dsscs were developed using thin films of scalable and highquality, nitrogendoped graphene nanoplatelets ngnp, which was synthesized by a simple twostep reaction sequence. Graphene materials and their use in dyesensitized solar cells joseph d. Department of chemistry, school of science, the university of tokyo, 731 hongo.
Apr 16, 2017 this means that if their new electrode is successfully implemented, we could see solar cells linked with superconductors that have 3,000 percent more storage capacity than whats currently possible. Graphene electrodes for organic solar cells mit news. The shortcircuit current and fill factor of these devices on graphene are lower than those of control device on indium tin oxide due to the higher sheet resistance of the graphene films. But one stubborn problem has slowed the development of such cells. The isolation of freestanding graphene in 2004 was the spark for a new scientific revolution in the field of optoelectronics. N doped graphene nanoplatelets as superior metalfree counter electrodes for organic dyesensitized solar cells article in acs nano 76 may 20 with 191 reads how we measure reads. Ultrathin and flexible perovskite solar cells with. Cvd graphene 30 90 23 reduced graphene oxide 80 79 24 a characteristics shown here are for the most commonly used ito on pet, rather than the best demonstrated performance. Ultrathin organic solar cells with graphene doped by.
All parts of the devices, including electrodes and active layers, were prepared at low temperature. Graphene electrodes for organic solar cells 6 january 2011, by david l. Ndoped graphenepedot composite films as counter electrodes. Flexion bonding transfer of multilayered graphene as a top. Aligned carbon nanotube sheets are developed as a new family of electrodes to fabricate dye. However, the fabrication reliability or device yield has not been widely discussed. Aligned carbon nanotube sheets for the electrodes of. Meng l et al 2018 organic and solutionprocessed tandem solar cells with 17. The devices also show good air stability, indicating that multilayer graphene is a promising environmental barrier that can protect the organic solar cells from air. Solutionprocessable graphene mesh transparent electrodes for. Jan 06, 2011 graphene is transparent, so that electrodes made from it can be applied to the transparent organic solar cells without blocking any of the incoming light. Pdf conjugated polymerbased bulk heterojunction bhj solar cells are widely recognized as a promising alternative to their. Metalelectrode free windowlike organic solar cells with p doped carbon nanotube thinfilm electrodes il jeon1, clement delacou2, antti kaskela3, esko i. Solar cell performance was analyzed before and after this encapsulation in order to determine exactly how efficient the addition of these graphene electrodes were to the device a as whole 2.
Due to its extraordinary optoelectronic and mechanical properties, graphene is the next wonder material that could act as an ideal lowcost alternative material for the effective replacement of the expensive conventional materials used in organic optoelectronic. Small molecular weight organic solar cells can be directly deposited. Aside from the two electrodes, traditional organic solar cells comprise of an active pedot. It is the first time to use graphene transparent electrodes in ultraflexible perovskite solar cells. Graphene materials and their use in dyesensitized solar cells. Researchers have had a hard time coming up with appropriate. Novel 2d material from amqsbased defect engineering for efficient. Doped and textured graphene as electrode for organic solar. Graphene could be used to manufacture the electrodes for the next generation of solar cells the solar power industry is currently reliant on organic materials such as indiumtinoxide ito for. Downloaded by fudan university on 02 september 2012.
Graphenebased transparent flexible electrodes for polymer solar cells. It has been well documented that graphene can be used for transparent electrodes in flat panel displays, tough screens, and solar cells. Researchers from mit developed a new way to use graphene as an electrode for organic solar cells. May 10, 2017 one way to improve the use of graphene in solar cells is to dope the sheets of graphene with oxygen to create graphene oxide which is less conductive but better able to hold a charge. The graphene electrodes were deposited on quartz substrates by spin coating of an aqueous dispersion of functionalized graphene, followed by a reduction process to reduce the sheet resistance. Conclusions and outlook u author information v corresponding author v notes v biographies v acknowledgments v abbreviations v references w 1.
Solutionprocessable graphene mesh transparent electrodes. An annealingfree process is considered as a technological advancement for the development of flexible or wearable organic electronic devices, which can prevent the distortion of substrates and damage to the active components of the device and simplify the overall fabrication process to increase the industrial applications. Ato nanoparticles are decorated by reduced graphene oxide rgo through a hydrothermal synthesis method. Introduction of graphene improves photovoltaic properties of perovskite solar cells pscs. Schottky junctions, where the graphene itself is responsible for absorbing visible light and show that these devices can be used as tunable photodetectors.
Transparent, flexible solar cells combine organic materials. Ndoped graphene nanoplatelets as superior metalfree counter. The devices also show good air stability, indicating that multilayer graphene is a promising environmental barrier. Organic solar cells using cvdgrown graphene electrodes view the table of contents for this issue, or go to the journal homepage for more home search collections journals about contact us my iopscience. Doped graphene electrodes for organic solar cells this article has been downloaded from iopscience. This means that if their new electrode is successfully implemented, we could see solar cells linked with superconductors that have 3,000 percent more storage capacity than whats currently possible. A new flexible, transparent solar cell developed at mit brings that future one step closer. The resultant ngnp was deposited on fluorinedoped sno2 ftoglass substrates by using electrospray espray coating, and their. Heavily ndoped monolayer graphene electrodes used for. Organic solar cells with solutionprocessed graphene. Replacing indiumtinoxide as the material for electrodes in organic solar cells provides a number of benefits. Pss layer and a donoracceptor blend layer commonly containing p 3 ht or fullerenes or both. The hybrid solar cell devices consist of solutionprocessed poly 3,4ethlenedioxythiophene.
Superior metalfree counter electrodes for organic dyesensitized solar cells. This new graphenebased electrode could boost solar storage. Ultrathin and flexible perovskite solar cells with graphene. Jul 17, 2017 aside from the two electrodes, traditional organic solar cells comprise of an active pedot. Flexible organic solar cells over 15% efficiency with. N doped graphene nanoplatelets as superior metalfree counter electrodes for organic dyesensitized solar cells.
Introduction dyesensitized solar cells dsscs have taken up broad interest as a promising lowcost solar cell. In addition, it is flexible, like the organic solar cells themselves, so it could be part of installations that require the panel to follow the contours of a structure, such as a patterned roof. Graphene electrodes could replace indium tin oxide for lower. Organic solar cells using cvdgrown graphene electrodes. Hobeom kim 1, sanghoon bae 2, taehee han 1, kyunggeun lim 1, jonghyun ahn 2 and taewoo lee 1. It has been well documented that graphene can be used for transparent electrodes in. Pdf to date graphene and graphenederived materials have created an. Pdf graphene synthesis and application for solar cells. Jan 24, 2018 an annealing free process is considered as a technological advancement for the development of flexible or wearable organic electronic devices, which can prevent the distortion of substrates and damage to the active components of the device and simplify the overall fabrication process to increase the industrial applications.
Its high transparency, conductivity, flexibility, and abundance make it an excellent material to be applied in the field of organic. Chemical doping and enhanced solar energy conversion of. Graphene, a material composed of oneatomthick planar sheets of sp 2 bonded carbon atoms with a twodimensional honeycomb structure, has been proposed for many applications due to its remarkable electronic, optical, thermal, and mechanical properties. Mit researchers use graphene as an electrode for organic. Solar cells were encapsulated with a glass substrate in order to successfully integrate the thinfilm graphene lsgmscs onto the device. For successful implementation in these applications, howev er, one major challenge in developing highperformance solar. Houston april 17, 2012 forests of carbon nanotubes are an efficient alternative for platinum electrodes in dyesensitized solar cells dsc, according to new research by collaborators at rice university and tsinghua university. Capacityboosted supercapacitors would offer both longterm reliability and quickburst energy release, he says. Ndoped graphene was also studied as the counter electrode of dsscs 79,80. Neutralcolor semitransparent organic solar cells with all.
The resultant ngnp was deposited on fluorine doped sno2 ftoglass substrates by using electrospray espray coating, and their. Graphene as transparent and current spreading electrode in. The energy conversion efficiency of the resulting cell is higher than the randomly dispersed carbon nanotube film and comparable with the platinum. P and n doped graphene electrodes have been used and the solar cells achieved a maximum efficiency of 1. Metalelectrodefree windowlike organic solar cells with pdoped carbon nanotube thinfilm electrodes il jeon1, clement delacou2, antti kaskela3, esko i. Aligned carbon nanotube sheets for the electrodes of organic. Jun 15, 2017 imagine a future in which solar cells are all around uson windows and walls, cell phones, laptops, and more. One way to improve the use of graphene in solar cells is to dope the sheets of graphene with oxygen to create graphene oxide which is less conductive but better able to hold a charge. Pss layer has been replaced by graphene derivatives and are generally used as holetransport layers in organic solar cells. Published 11 december 20 2014 iop publishing ltd nanotechnology, volume 25, number 1. Graphenebased transparent electrodes for hybrid solar cells.
Graphene applications in other types of solar cells u 7. The nature of graphene makes it a highly sought after material for transparent and non transparent electrodes and double electrode designs for supercapacitors. For the threelayer stacked graphene electrode, the transfer was repeated through layerbylayer stacking. Graphene electrodes for organic solar cells researchers identify technique that could make a new kind of solar photovoltaic panel practical nanotechnology, hyesung park et al 2010 nanotechnology 21 505204. The biggest problem with using graphene in such a device was getting the material to adhere to the panel.
This new graphenebased electrode could boost solar. Consequently, graphene seems to be a suitable candidate as a conductive electrode in devices such as organic lightemitting diode 187, solar cells 188 189190, and an electronic device. Organic solar cells using nanoimprinted transparent metal electrodes by myunggyu kang, myungsu kim, jinsang kim, and l. Chandler, mit news the structure of graphene, a flexible material made of carbon atoms arranged in a layer just one atom. Dyesensitized solar cells dsscs are wellknown as photovoltaic devices. Pss layer has been replaced by graphene derivatives and are commonly used as holetransport layers in organic solar cells. Our study reveals that blg based solar cell shows better efficiency of 24. Pss layer and a donoracceptor blend layer commonly composed of p3ht or fullerenes or both. A composite film was obtained by layer deposition of n doped graphene and poly3,4ethylenedioxythiophene pedot and was used as ptfree counter electrode for dyesensitized solar cells. 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. Environmental and economic assessment of itofree electrodes for organic solar cells christopher j. Owing to its outstanding electrical, optical, and mechanical.
Jun 25, 20 n doped graphene nanoplatelets as superior metalfree counter electrodes for organic dyesensitized solar cells. Surfaceengineered graphene quantum dots incorporated into. Graphene is a 2d atomic layer of carbon atoms with unique electronic properties like outstanding carrier mobility, high carrier saturation velocity, excellent thermal conductivity, high mechanical strength, transparency, thinness, and flexibility which make graphene an excellent choice of material for advanced applications in future solar cell design. The organic solar cells with the electrode of four layers graphene have an improved pce up to 2. Kauppinen3, shigeo maruyama2,4, and yutaka matsuo1, 1. Conductive graphene electrodes for dyesensitized solar cells. A novel concept based on the use of solutions containing already qualified crystalline antimonydoped tin oxide sno2. Large area graphene films were produced by chemical vapor deposition on copper foils and transferred onto glass as transparent electrodes.
Graphene has been employed as transparent electrodes in organic solar cells oscs due to its good physical and optical properties. Emmotta,n, antonio urbinaa,b, jenny nelsona a department of physics and grantham institute for climate change, imperial college london, london sw7 2az, united kingdom b department of electronics, technical university of cartagena, plaza hospital 1, 30202 cartagena, spain. The device combines lowcost organic carboncontaining materials with electrodes of graphene, a flexible, transparent material made from inexpensive, abundant carbon sources. Ndoped graphene nanoplatelets as superior metalfree. Various studies have reported opv devices with graphene electrodes showing comparable performances to itobased opv cells. We have carried out comparative study using both ag grids and blg as current spreading electrode cse and tcse, respectively. Applications of carbon nanotubes and graphene for thirdgeneration. We demonstrate that solutionprocessed graphene thin films can serve as transparent conductive anodes for organic photovoltaic cells. While organic solar cells have been promising an inexpensive way to exploit solar.
Graphene has attracted considerable attention as a nextgeneration transparent conducting electrode, because of its high electrical conductivity. We demonstrate highlytransparent organic solar cells with allgraphene electrode as well as inkjetprinted perovskite solar cells with graphene electrodes. All parts of the devices, including electrodes and active layers, were prepared at. Bulovickong create graphene electrodes for organic solar.
Metalelectrodefree windowlike organic solar cells with p. Rice, tsinghua collaboration could yield lowcost, efficient alternative to siliconbased cells. Free flexible organic solar cells with graphene top. Our perovskite solar cells are light weight and have the high power output per weight specific weight of 5 wg. The electrical and optical properties of the graphene oxide films are investigated systematically. Apr 17, 2012 rice, tsinghua collaboration could yield lowcost, efficient alternative to siliconbased cells. Bulovickong create graphene electrodes for organic solar cells.
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