Nanostructures of n-Type Organic Semiconductor in a p-Type Matrix via Self-Assembly of Block Copolymers

Lindner, Stefan; Thelakkat, Mukundan

doi:10.1021/ma0481656

Cited by 151 publications

(128 citation statements)

References 18 publications

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“…63 Once more, this is a primary consideration when designing block copolymers for photovoltaic devices. 123 It is important to mention the work of Lindner et al 152,177,178 where, for the first time, high molecular weight coil-coil block copolymers PvTPA-b-PPerAcr shown in Figure 7(a) were used to prepare devices that clearly demonstrated photovoltaic capabilities greater than blends of the same component homopolymers (Fig. 15).…”

Section: Reviewmentioning

confidence: 99%

Block copolymer strategies for solar cell technology

Topham¹,

Parnell²,

Hiorns³

2011

J Polym Sci B Polym Phys

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: Reviewmentioning

confidence: 99%

Block copolymer strategies for solar cell technology

Topham¹,

Parnell²,

Hiorns³

2011

J Polym Sci B Polym Phys

186

169

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“…A diblock copolymer consisting of alkoxy-substituted poly(p-phenylene- Fig. 3.26 Examples of various block copolymers containing electron-accepting (A) groups and electron-donating groups (D), and schemes for self-assembly that can lead to enhanced photovoltaic properties for charge collection to the external electrodes [436,439,444,446]. vinylene) (PPV) and fullerene-functionalized polystyrene block has been described (Fig.…”

Section: Fig 324mentioning

confidence: 99%

Transport and Electro‐Optical Properties in Polymeric Self‐Assembled Systems

Ikkala¹,

Brinke²

2007

Macromolecular Engineering

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“…22 To generate tailor-made BHJ's at the nanoscale, block copolymers can be used, which due to the incompatibility of different monomer types accomplish a process of phase separation and form stable continuous DA nanostructures. [28][29][30][31][32][33] Several attempts to covalently link D-and A-properties in block copolymers have successfully been carried out, such as in case of DA-diblock copolymers, 18,34 conjugated DADtriblock copolymers, 35 block copolymers based on covalent linking of conjugated and non-conjugated blocks, 22 as well as conjugated polymers connected to fullerene derivates. 25,36 The performance of block-copolymer materials in photovoltaic cells has recently been compared with polymer-blend systems and was found to be one order of magnitude more efficient in case of block-copolymer devices of the same thickness and composition.…”

Section: Introductionmentioning

confidence: 99%

A new multiscale modeling method for simulating the loss processes in polymer solar cell nanodevices

Pershin

Donets

Baeurle

2012

The Journal of Chemical Physics

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The photoelectric power conversion efficiency of polymer solar cells is till now, compared to conventional inorganic solar cells, still relatively low with maximum values ranging from 7% to 8%. This essentially relates to the existence of exciton and charge carrier loss phenomena, reducing the performance of polymer solar cells significantly. In this paper we introduce a new computer simulation technique, which permits to explore the causes of the occurrence of such phenomena at the nanoscale and to design new photovoltaic materials with optimized opto-electronic properties. Our approach consists in coupling a mesoscopic field-theoretic method with a suitable dynamic Monte Carlo algorithm, to model the elementary photovoltaic processes. Using this algorithm, we investigate the influence of structural characteristics and different device conditions on the exciton generation and charge transport efficiencies in case of a novel nanostructured polymer blend. More specifically, we find that the disjunction of continuous percolation paths leads to the creation of dead ends, resulting in charge carrier losses through charge recombination. Moreover, we observe that defects are characterized by a low exciton dissociation efficiency due to a high charge accumulation, counteracting the charge generation process. From these observations, we conclude that both the charge carrier loss and the exciton loss phenomena lead to a dramatic decrease in the internal quantum efficiency. Finally, by analyzing the photovoltaic behavior of the nanostructures under different circuit conditions, we demonstrate that charge injection significantly determines the impact of the defects on the solar cell performance.

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Nanostructures of n-Type Organic Semiconductor in a p-Type Matrix via Self-Assembly of Block Copolymers

Cited by 151 publications

References 18 publications

Block copolymer strategies for solar cell technology

Block copolymer strategies for solar cell technology

Transport and Electro‐Optical Properties in Polymeric Self‐Assembled Systems

A new multiscale modeling method for simulating the loss processes in polymer solar cell nanodevices

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