Alternatively linking fullerene and conjugated polymers

Hiorns, Roger C.; Iratçabal, P.; Bégué, Didier; Khoukh, Abdel; Bettignies, Rémi de; Leroy, Jacques; Firon, Muriel; Sentein, Carole; Martínez, Hervé; Preud’homme, Hugues; Dagron‐Lartigau, Christine

doi:10.1002/pola.23311

Cited by 39 publications

(43 citation statements)

References 67 publications

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“…119 It was also noted elsewhere, as an intuitive argument, that placing insulating groups right next to the electrodes would considerably diminish charge transfer and that rather, a parallel placement of block copolymers with respect the electrodes might be more appropriate. 169 This would also enhance the particularly important polymer-electrode interactions.…”

Section: As Single and Multicomponent Layersmentioning

confidence: 99%

Block copolymer strategies for solar cell technology

Topham¹,

Parnell²,

Hiorns³

2011

J Polym Sci B Polym Phys

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186

169

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A simple overview of the methods used and the expected benefits of block copolymers in organic photovoltaic devices is given in this review. The description of the photovoltaic process makes it clear how the detailed self-assembly properties of block copolymers can be exploited. Organic photovoltaic technology, an inexpensive, clean and renewable energy source, is an extremely promising option for replacing fossil fuels. It is expected to deliver printable devices processed on flexible substrates using high-volume techniques. Such devices, however, currently lack the long-term stability and efficiency to allow organic photovoltaics to surpass current technologies. Block copolymers are envisaged to help overcome these obstacles because of their long term structural stability and their solid-state morphology being of the appropriate dimensions to efficiently perform charge collection and transfer to electrodes.

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Section: As Single and Multicomponent Layersmentioning

confidence: 99%

Block copolymer strategies for solar cell technology

Topham¹,

Parnell²,

Hiorns³

2011

J Polym Sci B Polym Phys

Self Cite

186

169

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“…The self consistent field electronic structure was considered converged when the energy of two cycles changes by less than 10 -5 Hartree. The DFT/B3LYP/6-31G(1d) methodology has been widely employed in studies of conjugated polymers, where it has been shown to yield good results 14,16,28 . We analyzed the data for the lowest unoccupied and highest occupied molecular orbitals energy (LUMD and HDMD, respectively) and the energy gap between LUMD and HDMD (E g ).…”

Section: Calculation Proceduresmentioning

confidence: 99%

“…All studied structures were optimized by the HartreeFock semiempirical Parametric Method 6 (PM6) 26 implemented in the computational package MDPAC2012 27 . We chose PM6 because of its satisfactory performance in studies with polythiophene derivatives 8,9,16,28,29 . The geometry optimization process was considered completed when the gradient norm drops below 0.01 kcal.mol -1 /Å.…”

Section: Calculation Proceduresmentioning

confidence: 99%

Effect of the length of alkyl side chains in the electronic structure of conjugated polymers

Oliveira

Lavarda

2014

Mat. Res.

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Computational modeling studies of conjugated polymers have been shown to present many challenges. Dne such challenge is to find ways to reduce the computational cost for these studies without compromising the quality of the results. An approach longly used in the literature for this purpose is replacing long alkyl side chains (with six or more carbons) with a methyl group. This work reports on a theoretical study conducted with the conjugated polymer poly(3-hexylthiophene), which contains a hexyl side chain attached to the monomer, to verify the influence of the size of the alkyl side chain on its electronic structure. The results indicated that, for polymers containing long alkyl side chains, replacement with a propyl group offered full saturation of all properties under review, showing it to be a good approach.

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“…The relationship between polymer M W and PCE has been exhaustively studied in 301 P3HT and mixtures with PCBM [49][50][51][52][53][54][55][56][57][58][59][60][61]. We will attempt to briefly summarize the 302 lessons here.…”

mentioning

confidence: 99%

“…In the OPV field, the drying time for a film was not purposefully controlled until 493 with PCBM has been studied in great detail [42,56,59,70,76,. Optimized 494 thermally annealed devices are spin-coated from a chlorobenzene solution in a ratio 495 that contains 35-45% PCBM by weight.…”

mentioning

confidence: 99%

P3HT-Based Solar Cells: Structural Properties and Photovoltaic Performance

Moulé

Neher

Turner

2014

P3HT Revisited – From Molecular Scale to Solar Cell Devices

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Each year we are bombarded with B.Sc. and Ph.D. applications from 8 students that want to improve the world. They have learned that their future depends 9 on changing the type of fuel we use and that solar energy is our future. The hope and 10 energy of these young people will transform future energy technologies, but it will 11 not happen quickly. Organic photovoltaic devices are easy to draw AU1, but the mate-12 rials, processing steps, and ways of measuring the properties of the materials are 13 very complicated. It is not trivial to make a systematic measurement that will 14 change the way other research groups think or practice. In approaching this chapter, 15 we thought about what a new researcher would need to know about organic 16 photovoltaic devices and materials in order to have a good start in the subject. [1][2][3][4]. Similar 43 to the gold rush in the 1800s and the oil boom in the 1900s, intellectual property on 44 new technologies is now the boom industry for innovative people to become rich 45 and influential fast. In the twenty-first century, scientists and engineers are the 46 pioneers and our ideas are the prize. One of the most alluring energy technologies of 47 the past decade has been organic photovoltaics (OPV). This technology is alluring 48 because it could potentially reduce the cost of producing photovoltaic 49 (PV) modules and thereby make solar energy cost-competitive with fossil fuels. 50 As can be seen in Fig. 1, the allure of OPV brought thousands of scientists and 51 engineers into this new field, generating an exponential increase in scientific 52 knowledge (as measured by the number of scientific AU4 articles) in this area. The 53 sharp focus on OPV technology has led to an explosion of interest in enabling 54 technologies such as polymer synthesis, polymer physics, microstructural measure-55 ment techniques, multiscale modeling, photophysics, organic electronics, organic-56 inorganic hybrid materials, etc. All of this intense focus into one research area has 57 also created intense competition between research groups. With so many new 58 scientific articles published yearly, it is impossible to read them all, and repeat or 59 redundant articles have become unfortunately and unavoidably common. Even 60 review articles and books about OPV have proliferated, making production of an 61 original perspective difficult and a complete literature review impractical. We 62 apologize in advance if any important work is not cited here. 63Under this backdrop, we have decided to produce an article that is designed to be 64 helpful to students and postdocs who are entering this field. Rather than focusing on 65 the efficiency of devices or the morphology of materials (subjects that are covered 66 very well elsewhere), we instead focus some attention on how to approach OPV 67 research from a more practical (laboratory-based) perspective. Section 1 introduces A.J. Moulé et al. 68OPV devices, modules, and scale-up. Section 2 discusses fabrication of poly-3- Device Characterist...

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Alternatively linking fullerene and conjugated polymers

Cited by 39 publications

References 67 publications

Block copolymer strategies for solar cell technology

Block copolymer strategies for solar cell technology

Effect of the length of alkyl side chains in the electronic structure of conjugated polymers

P3HT-Based Solar Cells: Structural Properties and Photovoltaic Performance

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