Correlation of structure and photovoltaic performance of benzo[1,2-b:4,5-b′]dithiophene copolymers alternating with different acceptors

Yu, Jiangsheng; Zhao, Baofeng; Nie, Xuemei; Zhou, Baojin; Yang, Li; Hai, Jiefeng; Zhu, Enwei; Bian, Linyi; Wu, Hongbin; Tang, Weihua

doi:10.1039/c4nj02192d

Cited by 19 publications

(14 citation statements)

References 55 publications

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“…To obtain the TBCs, PDPP‐TT [ 34 ] and modified PDMS were synthesized and subsequently coupled. All monomers used for the PDPP‐TT synthesis are either commercially available or were synthesized after literature protocols [ 34 ] and characterized (Figures S1–S4, Supporting Information). For the reference polymer, the PSC block was endcapped with 4‐bromotoluene to fix the average MW and prevent further reactions (Figure S5, Supporting Information).…”

Section: Figurementioning

confidence: 99%

Ultrasoft and High‐Mobility Block Copolymers for Skin‐Compatible Electronics

et al. 2020

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Polymer semiconductors (PSCs) are an essential component of organic field‐effect transistors (OFETs), but their potential for stretchable electronics is limited by their brittleness and failure susceptibility upon strain. Herein, a covalent connection of two state‐of‐the‐art polymers—semiconducting poly‐diketo‐pyrrolopyrrole‐thienothiophene (PDPP‐TT) and elastomeric poly(dimethylsiloxane) (PDMS)—in a single triblock copolymer (TBC) chain is reported, which enables high charge carrier mobility and low modulus in one system. Three TBCs containing up to 65 wt% PDMS were obtained, and the TBC with 65 wt% PDMS content exhibits mobilities up to 0.1 cm2 V−1 s−1, in the range of the fully conjugated reference polymer PDPP‐TT (0.7 cm2 V−1 s−1). The TBC is ultrasoft with a low elastic modulus (5 MPa) in the range of mammalian tissue. The TBC exhibits an excellent stretchability and extraordinary durability, fully maintaining the initial electric conductivity in a doped state after 1500 cycles to 50% strain.

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Section: Figurementioning

confidence: 99%

Ultrasoft and High‐Mobility Block Copolymers for Skin‐Compatible Electronics

et al. 2020

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“…On the other hand, the TDPP unit was first monoalkylated with (S)‐ 1‐iodo‐3,7‐dimethyloctane and subsequently dialkylated with (R)‐ 1‐iodo‐3,7‐dimethyloctane to afford the (S),(R)‐ TDPP. The BDT based monomer carrying branched alkyl chain (for providing substantial solubility to the polymers) was synthesized by previously reported procedures 26 …”

Section: Resultsmentioning

confidence: 99%

Side‐chain induced chirality in diketopyrrolopyrrole based polymers

Maity

Bedi

Patil

2021

Journal of Polymer Science

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Chiral all‐π‐conjugated conducting polymers are of significant importance because of their promising aspects ranging from organic electronics, organic spin filters, efficient water splitting materials, magneto‐optic materials to circularly polarized light emitters. Here, we report the synthesis and characterization of the first series of diketopyrrolopyrrole based chiral low band‐gap alternating copolymers. Alongside characterizations by UV and CD spectroscopy, AFM and FESEM were further performed to understand the morphology of the optically active polymers. The stereochemistry of the side‐chains on TDPP unit played a pivotal role in determining chiroptical properties and supramolecular self‐assembly of the copolymers in solution which lead to layer‐by‐layer helical morphology in solid‐state. Interestingly, D‐A intramolecular charge transfer transition showed Cotton effect with bimodal nature, which is remarkably stronger than the π‐π* transition.

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“…To provide further insight into the fundamental of molecular structure, theoretical calculations were carried out using density functional theory (DFT) methods at Becke’s three-parameter gradient-corrected functional (B3LYP)/6-31G (d,p) level with the Gaussian 09 program. 41 To simplify the calculations, two repetition units of the polymer backbones were employed for the simulations; long alkyl or alkoxy side chains were replaced by methyl or methoxy, respectively. The optimized geometries and electronic structures of polymers with the calculated HOMO and LUMO energy levels are shown in Figure 6.…”

Section: Resultsmentioning

confidence: 99%

Effect of carbon hybridization in 9H-fluorene unit on the photovoltaic properties of different fluorene-based conjugated polymers

Lin

Wang

et al. 2017

High Performance Polymers

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To investigate the effect of different carbon hybridization in 9H-fluorene on the resultant polymers, a series of donor–acceptor conjugated polymers have been synthesized by copolymerizing substituted 9H-fluorenes with triazoloquinoxaline. All polymers exhibit good solution-processability and broad absorption in 350–1000 nm region with narrow optical bandgaps ranging from 1.27 eV to 1.55 eV. The results indicate that fluorene functionalization via different carbon hybridization on 9-position could be an effective strategy to fine-tune the absorption, energy levels, and photovoltaic performance of the polymers. 9-Position sp2-hybridized carbon in fluorene could enhance absorption of ultraviolet-visible and form good morphology of blending layers, through its planar rigid structure. All polymer solar cells devices exhibited moderate performance with the best power conversion efficiency of 3.02% achieved based on P2. Compared to ladder-type multifused fluorene, carbon-hybridized 9H-fluorene units can be a very useful building block for constructing narrow bandgap polymers with facile synthesis, and even interesting optoelectronic properties.

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Correlation of structure and photovoltaic performance of benzo[1,2-b:4,5-b′]dithiophene copolymers alternating with different acceptors

Abstract: The PBDTT–TTz/PC61BM (1 : 2) devices with PFN as the cathode interfacial layer delivered a power conversion efficiency of 2.60% for polymer solar cells.

Cited by 19 publications

References 55 publications

Ultrasoft and High‐Mobility Block Copolymers for Skin‐Compatible Electronics

Ultrasoft and High‐Mobility Block Copolymers for Skin‐Compatible Electronics

Side‐chain induced chirality in diketopyrrolopyrrole based polymers

Effect of carbon hybridization in 9H-fluorene unit on the photovoltaic properties of different fluorene-based conjugated polymers

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