Kan, Xiaonan; Xiao, Chengyi; Gao, Hanfei; Wang, Zhaohui; Wu, Yuchen; Su, Bin; Zhang, Jianqi; Wei, Zhixiang; Kong, Bin; Hu, Wenping; Sun, Yanming; Jiang, Lei; Heeger, Alan J.
Top-Pinning Controlled Dewetting for Fabrication of Large-Scaled Polymer Microwires and Applications in OFETs
A facile top-pining controlled dewetting strategy is developed to fabricate patterned polymeric 1D micro/nanostructures. Large-scaled polymer-polydithiophen-2-yl)-alt- pyridine] microwire arrays with mobility up to 29.0 cm2 V−1 s−1 are fabricated. The devices show excellent electrical stability in ambient conditions. This work paves the…
Toughening biodegradable polylactide with nanopores
Peng, Ningxing; Ju, Yunhui; Lv, Ruihua; Na, Bing; Liu, Qingxian; Wang, Bin
The inherent brittleness of biodegradable polylactide (PLA) limits its large-scale applications. A common route for toughening PLA is to incorporate other components by blending. In achieving good toughness, however, other properties such as strength and transparency are usually sacrificed to a large extent. Here we presented a facile approach to…
Toward surfactant-free and water-free microemulsions
Fischer, Veronika; Marcus, Julien; Touraud, Didier; Diat, Olivier; Kunz, Werner
It was recently demonstrated that a nano-clustering was present in the monophasic “pre-Ouzo” region of ternary liquid mixtures without surfactants. The goal of this work is to check if this nano-clustering is also present in the surfactant-free and water-free “green” microemulsions glycerol/ethanol/1-octanol and deep eutectic solvent/tetrahydrofurfuryl alcohol/diethyl adipate. The deep…
Triblock Copolymer Elastomers with Enhanced Mechanical Properties Synthesized by RAFT Polymerization and Subsequent Quaternization through Incorporation of a Comonomer with Imidazole Groups of about 2.0 Mass Percentage
Jiang, Feng; Fang, Chu; Zhang, Juan; Wang, Wentao; Wang, Zhigang
ABA triblock copolymer elastomers (TBCPEs) were first synthesized via reversible addition–fragmentation chain transfer (RAFT) polymerization, for which poly(isobornyl acrylate) (PIBA) was chosen as the dispersed hard microdomains, whereas poly(n-butyl acrylate)-co-poly(1-vinylimidazole) (P(BA-co-VI)) was chosen as the rubbery matrix. Two much distinct glass transition temperatures were found,…
Tunable Self-Assembly and Morphology-Dependent Photoconductivity of a Donor–Acceptor-Structured Diruthenium Complex
Sun, Meng-Jia; Zhang, Xinliang; Zhong, Yu-Wu; Zhan, Chuanlang; Yao, Jiannian
A donor–acceptor-structured diruthenium complex, 1(PF6)4, that contains an electron-deficient bridging ligand and electron-rich distal diarylamines modified with long aliphatic chains has been synthesized. By varying the solvent environments and assembly conditions, we obtained three different self-assembled nanostructures of 1(PF6)4, including zero-dimensional nanospheres, one-dimensional…
Tuning the morphology of functionalized silica using amphiphilic organosilanes
Besnard, Romain; Arrachart, Guilhem; Cambedouzou, Julien; Pellet-Rostaing, Stéphane
The co-condensation of tetraethoxysilane and an amphiphilic organosilane precursor containing an ammonium part is investigated in presence of different counter-ions. We highlight the morphological versatility offered by such “one pot” synthesis, resulting of the combinatory effects of the addition of tetraethoxysilane and of the nature of the counter-ion involved in…
Two-step cavitation in semi-crystalline polymer during stretching at temperature below glass transition
Chen, Ran; Lu, Ying; Zhao, Jiayi; Jiang, Zhiyong; Men, Yongfeng
Cavitation behavior in poly(4-methyl-1-pentene) upon stretching below glass transition temperature was investigated by in situ ultra-small angle X-ray scattering technique. Strong stress-whitening was observed indicating an extensive occurrence of cavitation in the material during tensile deformation below Tg. The X-ray scattering patterns suggest oriented disc-shaped cavities with normal mostly…
Understanding and controlling morphology evolution via DIO plasticization in PffBT4T-2OD/PC71BM devices
Zhang, Yiwei; Parnell, Andrew J.; Pontecchiani, Fabio; Cooper, Joshaniel F. K.; Thompson, Richard L.; Jones, Richard A. L.; King, Stephen M.; Lidzey, David G.; Bernardo, Gabriel
We demonstrate that the inclusion of a small amount of the co-solvent 1,8-diiodooctane in the preparation of a bulk-heterojunction photovoltaic device increases its power conversion efficiency by 20%, through a mechanism of transient plasticisation. We follow the removal of 1,8-diiodooctane directly after spin-coating using ellipsometry and ion beam analysis, while…
Understanding effects of two different acceptors in one small molecule for solution processable organic solar cells
Zhao, Yifan; Yuan, Liu; Zhang, Jianqi; Zhu, Lingyun; Lu, Kun; Yan, Wei; Wei, Zhixiang
Introducing two different electron-withdrawing groups into the molecular backbone is one of the effective methods to extend absorption and lower the highest occupied molecular orbital (HOMO) energy level for a high open-circuit voltage (Voc). However, examples of two-acceptor type small molecules are less studied. In order to understand the effect…
Understanding the Impact of Hierarchical Nanostructure in Ternary Organic Solar Cells
Fang, Jin; Wang, Zaiyu; Zhang, Jianqi; Zhang, Yajie; Deng, Dan; Wang, Zhen; Lu, Kun; Ma, Wei; Wei, Zhixiang
Ternary organic solar cells (OSCs), which blend two donors and fullerene derivatives with different absorption ranges, are a promising potential strategy for high-power conversion efficiencies (PCEs). In this study, inverted ternary OSCs are fabricated by blending a highly crystalline small molecule BDT-3T-CNCOO in a low band gap polymer PBDTTT-C-T:PC71BM. As…