Photoinduced Electron Transfer and Photovoltaic Devices of a Conjugated Polymer with Pendant Fullerenes

Ramos, A Alicia Marcos; Rispens, Minze T.; Duren, van Jkj Jeroen; Hummelen, JC Jan; Janssen, Raj René

doi:10.1021/ja015614y

Cited by 262 publications

(154 citation statements)

References 30 publications

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“…A device consisting of a spin-cast fi lm of 2 on an indium tin oxide (ITO) electrode coated with a fi lm of poly(3,4-ethylenedioxythiophene): polystyrenesulfonic acid (PEDOT-PSS) and an aluminium cathode gave a short-circuit current density ( J sc ) of 0.42 mA cm − 2 , an open-circuit voltage ( V oc ) of 0.83 V and a fi ll-factor ( FF ) of 0.29 under white light irradiation (100 mW cm − 2 ), leading to a 0.10% power conversion effi ciency (PCE). [ 43 ] More recently, Li and coworkers synthesized the poly(bithiophene) 3 in which the C 60 block was connected to the conjugated chain by a fl exible spacer. A terminal stilbenic unit was used as conecting group in order to broaden the absorption spectrum of the polymer.…”

Section: -Derivatized Linear π -Conjugated Systems: "Double Cablmentioning

confidence: 99%

Single Material Solar Cells: the Next Frontier for Organic Photovoltaics?

Roncali

2011

Advanced Energy Materials

141

164

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An overview of various approaches for the realization of single‐material organic solar cells (SMOCs) is presented. Fullerene‐conjugated systems dyads, di‐block copolymers, and self‐organized donor‐acceptor molecules all represent different possible approaches towards SMOCs. Although each of them presents specific advantages and poses specific problems of design and synthesis, these different routes have witnessed significant progress in the past few years and SMOCs with efficiencies in the range of 1.50% have been realized. These performances are already higher than those of bi‐component bulk heterojunction solar cells some ten years ago, demonstrating that SMOCs can represent a credible approach towards efficient and simple organic solar cells. Possible directions for future research are discussed with the aim of stimulating further research on this exciting topic.

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Section: -Derivatized Linear π -Conjugated Systems: "Double Cablmentioning

confidence: 99%

Single Material Solar Cells: the Next Frontier for Organic Photovoltaics?

Roncali

2011

Advanced Energy Materials

141

164

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“…34,35 A solar cell made using a double cable compound with a hybrid poly(p-phenylene vinylene)/poly(p-phenylene ethynylene) backbone and attached methanofullerenes was first reported by Janssen and co-workers. 36 Singlet EET to the fullerene was found to occur in non-polar solution, while the polymer fluorescence was quenched by photoinduced CS in thin films, yielding charge carriers with a millisecond lifetime.…”

Section: Introductionmentioning

confidence: 98%

Ultrafast spectroscopic investigation of a fullerene poly(3-hexylthiophene) dyad

et al. 2011

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We present the femtosecond spectroscopic investigation of a covalently linked dyad, PCB-P3HT, formed by a segment of the conjugated polymer P3HT (regioregular poly(3-hexylthiophene) that is end-capped with the fullerene derivative PCB ([6,6]-phenyl-C 61 -butyric acid ester), adapted from PCBM. The fluorescence of the P3HT segment in tetrahydrofuran (THF) solution is reduced by 64% in the dyad compared to a control compound without attached fullerene (P3HT-OH). Fluorescence upconversion measurements reveal that the partial fluorescence quenching of PCB-P3HT in THF is multiphasic and occurs on an average time scale of 100 ps, in parallel to excited-state relaxation processes. Judging from ultrafast transient absorption experiments, the origin of the quenching is excitation energy transfer from the P3HT donor to the PCB acceptor. Due to the much higher solubility of P3HT compared to PCB in THF, the PCB-P3HT dyad molecules self-assemble into micelles. When pure C 60 is added to the solution, it is incorporated into the fullerene-rich center of the micelles. This dramatically increases the solubility of C 60 , but does not lead to significant additional quenching of the P3HT fluorescence by the C 60 contained in the micelles. In PCB-P3HT thin films drop-cast from THF, the micelle structure is conserved. In contrast to solution, quantitative and ultrafast (<150 fs) charge separation occurs in the solid-state films and leads to the formation of long-lived mobile charge carriers with characteristic transient absorption signatures similar to those that have been observed in P3HT:PCBM bulk heterojunction blends. While π-stacking interactions between neighboring P3HT chains are weak in the micelles, they are strong in thin films drop-cast from ortho-dichlorobenzene (DCB). Here, PCB-P3HT self-assembles into a network of long fibers, clearly seen in AFM images.Ultrafast charge separation occurs also for the fibrous morphology, but the transient absorption experiments show fast loss of part of the charge carriers due to intensity-induced 2 recombination/annihilation processes and monomolecular interfacial trap-mediated or geminate recombination. The yield of the long-lived charge carriers in the highly organized fibers is however comparable to that obtained with annealed P3HT:PCBM blends. PCB-P3HT can therefore be considered as an active material in organic photovoltaic devices.

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“…Other examples of fullerene assemblies [477][478][479][480][481][482][483][484] have been extensively reported, as well as preparation of polymer composites [485][486][487][488][489][490][491]. Fabrication of hollow carbon nanospheres from oxidized fullerenes [492] and fullerene nanoparticles by manual grinding [493] might also have interesting implications.…”

Section: Fullerene and Graphenementioning

confidence: 99%

Challenges and breakthroughs in recent research on self-assembly

Ariga

Hill

Lee

et al. 2008

Science and Technology of Advanced Materials

735

410

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The controlled fabrication of nanometer-scale objects is without doubt one of the central issues in current science and technology. However, existing fabrication techniques suffer from several disadvantages including size-restrictions and a general paucity of applicable materials. Because of this, the development of alternative approaches based on supramolecular self-assembly processes is anticipated as a breakthrough methodology. This review article aims to comprehensively summarize the salient aspects of self-assembly through the introduction of the recent challenges and breakthroughs in three categories: (i) types of self-assembly in bulk media; (ii) types of components for self-assembly in bulk media; and (iii) self-assembly at interfaces.

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Photoinduced Electron Transfer and Photovoltaic Devices of a Conjugated Polymer with Pendant Fullerenes

Cited by 262 publications

References 30 publications

Single Material Solar Cells: the Next Frontier for Organic Photovoltaics?

Single Material Solar Cells: the Next Frontier for Organic Photovoltaics?

Ultrafast spectroscopic investigation of a fullerene poly(3-hexylthiophene) dyad

Challenges and breakthroughs in recent research on self-assembly

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