Four polymers that contain alkyl chains branched at different positions on the polymer backbone are prepared. A with 4-decyltetradecyl gives an impressive mobility of 3.62 cm2 V−1 s−1. This may arise from tighter packing as well stacking conformation change induced by branching chains.

Two conjugated polymers, IIDDT and IIDT, based on an isoindigo core were developed for organic field-effect transisitors. Investigation of their performance indicated that exhibited air-stable mobility up to 0.79 cm(2) V(-1) s(-1), which is quite high among polymer FET materials. The facile preparation such polymers make isoindigo-based very promising application as solution-processable semiconductors optoelectronic devices.

In the past couple of years, remarkable progress has been made in solution-processable organic semiconducting materials for optoelectronics. The development novel π-conjugated backbones always central issue this field. contrast, flexible side chains are less developed and usually used only as solubilizing groups. Perspective, we highlight effects semiconductors, including influences length, odd–even effect, substitution position, terminal groups, branching chirality alkyl chains, well some...

Novel spiro-functionalized polyfluorene derivatives (see Figure) are synthesized here. The absorbance and photoluminescence properties of these compounds investigated pure blue electroluminescence is demonstrated in single-layered double-layered devices. Spiro-functionalization concluded to be a promising approach addressing the issues color impurity poor spectral stability polyfluorenes.

Replacement of C=C unit with its isoelectronic B-N in aromatics provides a new class molecules appealing properties, which have attracted great attention recently. In this Concept, we focus on BN-substituted polycyclic fused structures, and review their synthesis, photophysical, redox as well applications organic electronics. We also present challenging synthetic targets, large BN- substituted aromatics, such regioregular BN heterosuperbenzenes, can be viewed BN-doped nanographenes. Finally,...

Conjugated polymers have developed rapidly due to their promising applications in low-cost, lightweight, and flexible electronics. The development of the third-generation donor-acceptor (D-A) greatly improved device performance organic solar cells (OSCs) field-effect transistors (FETs). However, for further improvement performance, scientists need develop new building blocks, particular electron-deficient aromatics, gain an in-depth understanding structure-property relationships. Recently,...

Three n-type polymers BDPPV, ClBDPPV, and FBDPPV which exhibit outstanding electrical conductivities when mixed with an dopant, N-DMBI ((4-(1,3-dimethyl-2,3-dihydro-1H-benzoimidazol-2-yl)phenyl)dimethylamine), in solution. High electron mobility efficient doping process endow the highest of 14 S cm(-1) power factors up to 28 μW m(-1) K(-2), is thermoelectric (TE) factor that has been reported for solution processable conjugated polymers. Our investigations reveal introduction halogen atoms...

Ambipolar transport behavior in isoindigo-based conjugated polymers is observed for the first time. Fluorination on isoindigo unit effectively lowers LUMO level of polymer and significantly increases electron mobility from 10(-2) to 0.43 cm(2) V(-1) s(-1) while maintaining high hole up 1.85 FET devices fabricated ambient. Further investigation indicates that fluorination also affects interchain interactions backbones, thus leading different packing thin films.

The charge carrier mobility of p-type and ambipolar polymer field-effect transistors (FETs) has been improved substantially. Nonetheless, high-mobility n-type polymers are rare, few can be operated under ambient conditions. This situation is mainly caused by the scarcity strong electron-deficient building blocks. Herein, we present two novel blocks, FBDOPV-1 FBDOPV-2, with low LUMO levels down to -4.38 eV. On basis both develop poly(p-phenylene vinylene) derivatives (PPVs), FBDPPV-1...

Poly(p-phenylene vinylene) derivatives (PPVs) are one of the most widely investigated p-type polymers in organic electronics. PPVs generally exhibit electron mobilities lower than 10–4 cm2 V–1 s–1, thus hindering their applications high-performance polymer field-effect transistors and photovoltaics. Herein, we design synthesize a novel electron-deficient PPV derivative, benzodifurandione-based (BDPPV). This new derivative displays high up to 1.1 s–1 under ambient conditions (4 orders...

Ten isoindigo-based polymers were synthesized, and their photophysical electrochemical properties device performances systematically investigated. The HOMO levels of the tuned by introducing different donor units, yet all exhibited p-type semiconducting properties. hole mobilities these with centrosymmetric units exceeded 0.3 cm2 V–1 s–1, maximum reached 1.06 s–1. Because low-lying levels, copolymers also showed good stability upon moisture. AFM GIXD analyses revealed that symmetry backbone...

A straightforward strategy has been used to construct large BN-embedded π-systems simply from azaacenes. BN heterosuperbenzene derivatives, the largest heteroaromatics date, have synthesized in three steps. The molecules exhibit curved π-surfaces, showing two different conformations which are self-organized into a sandwich structure and further packed π-stacking column. assembled microribbons good charge transport properties photoconductivity, representing an important step toward...

Because of their resolvable crystal structure, organic conjugated small molecules are intrinsically ideal for elucidating the relationship between microstructures and charge transport properties. It has been reported that properties depend on molecular structure packing. In solid state, π–π stacking is significant in process. Since influenced at different degrees by other intra- intermolecular interactions, as a result, further can be controlled or tuned engineering through precise chemical...

Boron–nitrogen units were incorporated into thiophene-fused polycyclic aromatic compounds. Organic field-effect transistors based on these azaborine compounds fabricated, demonstrating a novel engineering concept of organic semiconductors and providing opportunities broad class BN-containing for application in future electronic devices (see picture; μFET=hole mobility). As service to our authors readers, this journal provides supporting information supplied by the authors. Such materials are...

Molecular packing in organic single crystals greatly influences their charge transport properties but can hardly be predicted and designed because of the complex intermolecular interactions. In this work, we have realized systematic fine-tuning single-crystal molecular five benzodifurandione-based oligo(p-phenylenevinylene) (BDOPV)-based small molecules through incorporation electronegative fluorine atoms on BDOPV backbone. While these all exhibit similar column stacking configurations...

A series of PDI dimers featuring various arylene linkers are developed as electron acceptors in organic solar cells. Using P3HT the donor, power conversion efficiency up to 2.3% is achieved with two having spirobifluorene linkers. The results indicate that such non-planar, three-dimensional structures effectively suppress self-aggregation and crystallization units, which favourable for their cell performance.

Development of special organic materials that are able to absorb light energy in the second near-infrared window (NIR-II) is significantly important for treating deep-tissue-buried diseases or supplying power implantable electronic devices. Herein, a narrow bandgap donor–acceptor (D-A) conjugated polymer with thiophene-fused benzodifurandione-based oligo(p-phenylenevinylene) (TBDOPV) as acceptor part and 2,2′-bithiophene (DT) donor was developed exploited photothermal conversion material...

Photothermal conversion in the second near-infrared (NIR-II) window allows deeper penetration and higher exposure to lasers, but examples of NIR-II photothermal agents are mainly formulated by inorganic compounds. In view underlying influence materials, a novel nanoagent based on narrow band gap D-A conjugated polymer (TBDOPV-DT) with 2,2-bithiophene as donor thiophene-fused benzodifurandione-based oligo( p-phenylenevinylene) acceptor has been developed. More importantly, TBDOPV-DT...

Abstract Conjugated polymers with high thermoelectric performance enable the fabrication of low‐cost, large‐area, low‐toxicity, and highly flexible devices. However, compared to their p‐type counterparts, n‐type polymer materials show much lower performance, which is largely due inefficient doping a conductivity. Herein, it reported that development donor–acceptor (D–A) enhanced n‐doping efficiency through donor engineering backbone. Both electrical conductivity 1.30 S cm −1 an excellent...

In the past several decades, conducting polymers have achieved remarkable progress and been widely applied as active materials for optoelectronics. So far, p-type exhibit high conductivities over 1000 S cm–1 thermoelectric performance comparable to that of inorganic materials; however, only a few n-type showed 1 after doping. The low conductivity is considered major barrier further enhancing their performances. this perspective, we highlight scientific engineering challenges enhance polymer...

Planar backbone, locked conformation, and low lowest unoccupied molecular orbital level provide polymer F4BDOPV-2T with ultrahigh electron mobilities of up to 14.9 cm2 V−1 s−1 good air stability. It is found that the nonlinear transfer curves can be tuned near-ideal ones by changing fabrication conditions, indicating film morphology largely contributes in high-mobility conjugated polymers. As a service our authors readers, this journal provides supporting information supplied authors. Such...

Abstract Low n‐doping efficiency and inferior stability restrict the thermoelectric performance of n‐type conjugated polymers, making their lag far behind p ‐type counterparts. Reported here are two rigid coplanar poly( ‐phenylene vinylene) (PPV) derivatives, LPPV‐1 LPPV‐2 , which show nearly torsion‐free backbones. The fused electron‐deficient structures endow derivatives with less conformational disorder low‐lying lowest unoccupied molecular orbital (LUMO) levels, down to −4.49 eV. After...