Temperature and Time Dependence of Heat Treatment of RR-P3HT/PCBM Solar Cell

Inoue, Kanzan; Ulbricht, Ross; Madakasira, Pallavi; Sampson, William M.; Lee, Sergey; Gutiérrez, José Marı́a; Ferraris, John P.; Zakhidov, Anvar A.

doi:10.1016/j.synthmet.2005.07.010

Cited by 48 publications

(36 citation statements)

References 9 publications

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“…In the present work, the PCEs for both graphene and ITO devices measured under laser illumination using neutral density filters were found to decrease with increasing illumination intensity (Fig. 3b), most likely due to the resulting decrease in parallel shunt resistance 19 .…”

Section: Resultssupporting

confidence: 49%

Technology ready use of single layer graphene as a transparent electrode for hybrid photovoltaic devices

Wang

Puls

Staley

et al. 2011

Physica E: Low-dimensional Systems and Nanostructures

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Abstract:Graphene has been used recently as a replacement for indium tin oxide (ITO) for the transparent electrode of an organic photovoltaic device. Due to its limited supply, ITO is considered as a limiting factor for the commercialization of organic solar cells. We explored the use of large-area graphene grown on copper by chemical vapor deposition (CVD) and then transferred to a glass substrate as an alternative transparent electrode. The transferred film was shown by scanning Raman spectroscopy measurements to consist of >90% single layer graphene. Optical spectroscopy measurements showed that the layer-transferred graphene has an optical absorbance of 1.23% at a wavelength of 532 nm. We fabricated organic hybrid solar cells utilizing this material as an electrode and compared their performance with ITO devices fabricated using the same procedure. We demonstrated power conversion efficiency up to 3.98%, higher than that of the ITO device (3.86%),showing that layer-transferred graphene promises to be a high quality, low-cost, flexible material for transparent electrodes in solar cell technology.

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Section: Resultssupporting

confidence: 49%

Technology ready use of single layer graphene as a transparent electrode for hybrid photovoltaic devices

Wang

Puls

Staley

et al. 2011

Physica E: Low-dimensional Systems and Nanostructures

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“…Bulk heterojunction device architecture of regioregular P3HT and PCBM was created with a CNT anode using extended homogenization by steering followed by heat treatment at the optimal temperature and time [5]. The nanocomposites of home synthesized fresh P3HT with PCBM spin coated on an ITO coted glass substrate at optimal concentration is demonstrated to give a record >4% power efficiency [5].…”

Section: Resultsmentioning

confidence: 99%

“…The goal of our work is to create flexible plastic solar cells (SC), using nanoscale composites of conjugated polymers with inorganic components (fullerenes, nanotubes, titania nanofibers) on the load bearing carbon nanotube transparent electrodes in bulk heterojunction solar cell architecture, which we have optimized earlier at ~4% efficiency [5]. Figure 2 depicts an organic solar cell based on carbon nanotube ribbons as a front-surface transparent conducting electrode, formed on a glass or plastic substrate.…”

Section: Introductionmentioning

confidence: 99%

Polymeric solar cells with oriented and strong transparent carbon nanotube anode

Ulbricht

Jiang

Lee

et al. 2006

Physica Status Solidi (b)

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PACS 84.60. Jt, 85.35.Kt In this study, an oriented, strong and transparent multiwall carbon nanotube sheet is used as the hole collecting electrode in polymer solar cells with RR-P3HT as the donor material and PCBM as the acceptor material. An open circuit voltage of 0.49 V, a short circuit current of 5.47 mA/cm 2 , a fill factor of 0.49, and an efficiency of 1.32% have been obtained. Performance dependence on incident light intensity along with other various investigations are presented.

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“…[14] These domains form with larger size and crystallinity for higher heat-treatment temperatures [18] and longer solvent soaking times. [19,20] Depending on the fabrication and measurement techniques, the aligned domains of P3HT are depicted as fibers [12] or as shapeless masses. [14] The majority of these studies do not, however, allow quantification of the percentage of the P3HT that is agglomerated/ crystalline in the final device.…”

Section: By Adam J Moulé and Klaus Meerholz*mentioning

confidence: 99%

Controlling Morphology in Polymer–Fullerene Mixtures

2007

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In the past several years, polymer-fullerene mixtures have been intensely studied for use in organic solar cells because they can be deposited from solution, are compatible with lowcost roll-to-roll fabrication technology, and have shown high power conversion efficiency (g), up to 4-5%. [1][2][3] The best devices consist of a single bulk-heterojunction active layer, in which the polymer (donor) and fullerene (acceptor) are deposited from a common solvent. As the solvent dries the donor and acceptor components separate into domains. The final efficiency of the solar cell has been shown to be extremely sensitive to the size, composition, and crystallinity of the formed domains. [4,5] Improvement of the morphology in devices fabricated with a mixture of [6,6]-phenyl C 61 -butyric acid methyl ester (PCBM) and regioregular poly(3-hexylthiophene) (P3HT) has been achieved by using heat-treatment techniques [2,6] and long-time solvent curing, [1] with resulting record efficiencies. More recently, a method for increasing the crystallinity of the P3HT component has been introduced which involves filtering preformed nanofibers of P3HT out of solution and mixing the prepared nanofiber dispersion with PCBM to increase the efficiency of as-cast devices. [7] Interestingly, the best device performance was achieved by mixing lower-molecular-weight (M W ) amorphous P3HT back into the solution to reduce the crystalline content of the active layer and, thereby, to increase connection between crystalline domains. Studies of the M W impact on P3HT/PCBM solar cells have indicated that a large polydispersity and number-average molecular weight (M n ) over 19000 g mol -1 leads to improved efficiency. [8,9] Morphology studies of organic field-effect transistor (OFET) devices indicate that the increased M W leads to better network formation between crystalline domains. [10,11]

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Temperature and Time Dependence of Heat Treatment of RR-P3HT/PCBM Solar Cell

Cited by 48 publications

References 9 publications

Technology ready use of single layer graphene as a transparent electrode for hybrid photovoltaic devices

Technology ready use of single layer graphene as a transparent electrode for hybrid photovoltaic devices

Polymeric solar cells with oriented and strong transparent carbon nanotube anode

Controlling Morphology in Polymer–Fullerene Mixtures

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