Poly(3-hexylthiophene) bearing pendant fullerenes: aggregation vs. self-organization

Gholamkhass, Bobak; Peckham, Timothy J.; Holdcroft, Steven

doi:10.1039/b9py00384c

Cited by 49 publications

(37 citation statements)

References 50 publications

(21 reference statements)

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“…Compared with the p-type block copolymers, relatively few results are available for n-type block copolymers, possibly due to the difficulty of the synthetic method based on n-type conjugated backbones. [143][144][145][146][147][148][149][150][151][152][153][154][155][156][157][158][159][160][161] However, a study on donor-acceptor rod-coil diblock copolymers of P3HT and poly(2-phenyl-5-(4-vinylphenyl)-1,3,4-oxadiazole) (POXD) showed that the incorporation of the POXD acceptor would reduce the degree of order of P3HT leading to lower field-effect mobilities. [137,[142][143][144] Huettner et al synthesized a diblock copolymer consisting of poly(perylene bisimide acrylate) and PS.…”

Section: Wileyonlinelibrarycommentioning

confidence: 99%

Effective Use of Electrically Insulating Units in Organic Semiconductor Thin Films for High‐Performance Organic Transistors

Kang

Qiu

et al. 2016

Adv Elect Materials

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The electrical properties of organic semiconductors (OSCs), whether they are conjugated small molecules or polymers, can be tailored by incorporating electrically insulating units (EIUs), which are organic moieties consisting of nonconjugated units. EIUs can be introduced to a thin film by synthetically connecting them to the otherwise conjugated OSC molecules or by blending them in as separate EIU molecules with the OSCs during the thin‐film fabrication process. The engineered EIUs are capable of imparting various additional functions to the OSC thin film and improving their electrical properties. In this review article, a comprehensive overview of various effects of EIUs on OSC thin films and their consequent electrical performance when used as active layers in organic field‐effect transistors (OFETs) is provided. A broad range of studies of the synthetic approaches of incorporating EIUs, such as those using side chains, block copolymers, and conjugation‐break spacers, and of the blending approaches with organic insulators is discussed. Finally, a brief summary and perspectives for future research in this field are presented.

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Section: Wileyonlinelibrarycommentioning

confidence: 99%

Effective Use of Electrically Insulating Units in Organic Semiconductor Thin Films for High‐Performance Organic Transistors

Kang

Qiu

et al. 2016

Adv Elect Materials

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“…82 To rectify one of the problems with PCBM (namely its tendency to undergo excessive crystallization), research has effectively demonstrated the use of cross-linking groups. 83,84 Of similar interest are polymers carrying pendent fullerenes, 85 although they tend to suffer from aggregative effects of C 60 rather than self-assembly, 86 or linear main-chain polymers based on C 60 as a monomer, which seem to have displayed morphologies more appropriate to charge collection and transfer. 87 Further work on other acceptors such as perylene, notably perylene tetracarboxydiimide (PDI), 88,89 the poly(benzimidazobenzophenanthroline) ladder (BBL), 90 and units based on 9,9'-bifluorenylidene, 91 conversely, have shown that fullerene may not be necessary.…”

Section: Figurementioning

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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“…In the past, fullerene (C 60 ) and PCBM were incorporated into macromolecules as pendent moieties. 20 While this remains one route, it can let the fullerene sphere continue to form aggregates, 21 possibly because of the high degrees of freedom. Nevertheless, pendent fullerenes have been preferred because it is generally easier to control the chemistry; as soon as conditions such as concentration and temperature are increased to force more than one addition, multi-additions can occur at any of 30 available [6,6]-double bonds.…”

Section: Introductionmentioning

confidence: 99%

Increased thermal stabilization of polymer photovoltaic cells with oligomeric PCBM

Ramanitra

Dowland

Bregadiolli³

et al. 2016

J. Mater. Chem. C

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The first oligomerisation of phenyl-C 61 -butyric acid methyl ester (PCBM) using a facile atom transfer radical addition polymerization (ATRAP) and its exploitation for organic photovoltaic devices is described.Oligo{(phenyl-C 61 -butyric acid methyl ester)-alt-[1,4-bis(bromomethyl)-2,5-bis(octyloxy)benzene]} (OPCBMMB) shows opto-electronic properties equivalent to those of PCBM but has a higher glass transition temperature. When mixed with various band gap semiconducting polymers, OPCBMMB delivers performances similar to PCBM but with an enhanced stabilization of the bulk heterojunction in photovoltaic devices on plastic substrates under thermal stress, regardless of the degree of crystallinity of the polymer and without changing opto-electronic properties.

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Poly(3-hexylthiophene) bearing pendant fullerenes: aggregation vs. self-organization

Cited by 49 publications

References 50 publications

Effective Use of Electrically Insulating Units in Organic Semiconductor Thin Films for High‐Performance Organic Transistors

Effective Use of Electrically Insulating Units in Organic Semiconductor Thin Films for High‐Performance Organic Transistors

Block copolymer strategies for solar cell technology

Increased thermal stabilization of polymer photovoltaic cells with oligomeric PCBM

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