Oxidative coupling of α-bromoarylacetonitriles and oxidative decyanation of diarylacetonitriles are efficiently realized by solid-liquid phase transfer catalysis using anhydrous K 3 PO 4 as base and TBAB as catalyst ...Oxidative coupling of α-bromoarylacetonitriles and oxidative decyanation of diarylacetonitriles are efficiently realized by solid-liquid phase transfer catalysis using anhydrous K 3 PO 4 as base and TBAB as catalyst in acetone at room temperature. In this mild and convenient method, α,β-dicyanostilbenes and diarylketones were prepared in good to excellent yields.展开更多
Photovoltaic performance of the organic solar cells (OSCs) based on 2-((5'-(4-((4-((E)-2-(5'-(2,2-dicyanovinyl)-3',4-dihexyl- 2,2'-bithiophen-5-yl)vinyl) phenyl)(phenyl)amino)styryl)-4~4'-dihe...Photovoltaic performance of the organic solar cells (OSCs) based on 2-((5'-(4-((4-((E)-2-(5'-(2,2-dicyanovinyl)-3',4-dihexyl- 2,2'-bithiophen-5-yl)vinyl) phenyl)(phenyl)amino)styryl)-4~4'-dihexyl-2,2'-bithiophen-5-yl)methylene)malononitrile (L(TPA- bTV-DCN)) as donor and PC70BM as acceptor was optimized using 0.25 vol% high boiling point solvent additive of 1-chloronaphthalene (CN), 1,6-hexanedithiol (HDT), or 1,8-diodooctane (DIO). The optimized OSC based on L(TPA-bTV- DCN)-PC70BM (1:2, w/w) with 0.25 vol% CN exhibits an enhanced power conversion efficiency (PCE) of 2.61%, with Voc of 0.87 V, Jsc of 6.95 mA/cm2, and FF of 43.2%, under the illumination of 100 mW/cm2 AM 1.5 G simulated solar light, whereas the PCE of the OSC based on the same active layer without additive is only 1.79%. The effect of the additive on absorption spectra and the atomic force microscopy images of L(TPA-bTV-DCN)-PCv0BM blend films were further investigated. The improved efficiency of the device could be ascribed to the enhanced absorption and optimized domain size in the L(TPA-bTV-DCN)-PC70BM blend film.展开更多
Iridium complexes with dicyanovinyl-grafted phenylpyridine/l-phenylisoquinoline as ligands are synthesized and their photo- physical, electrochemical, and sensitization properties in DSSCs are investigated. The iridiu...Iridium complexes with dicyanovinyl-grafted phenylpyridine/l-phenylisoquinoline as ligands are synthesized and their photo- physical, electrochemical, and sensitization properties in DSSCs are investigated. The iridium complexes present significantly enhanced absorption from 400 to 525 nm. The 1-phenylisoquinoline-based iridium complex show bathochromic-shift emission in DMSO solution compared with their phenylpyridine-based counterpart, while their absorption response and photoluminescence peak in solid show little difference despite extension of the conjugated system. Using DSSCs, the conversion efficiency of 0.62% and open-circuit current of 1.4 mA/cm2 is achieved. The poor performance is attributed to the excited-state properties of iridium complexes according to the TD-DFT calculation.展开更多
基金Natural Science Foundation of China (Grant No.NSFC 20672009)
文摘Oxidative coupling of α-bromoarylacetonitriles and oxidative decyanation of diarylacetonitriles are efficiently realized by solid-liquid phase transfer catalysis using anhydrous K 3 PO 4 as base and TBAB as catalyst in acetone at room temperature. In this mild and convenient method, α,β-dicyanostilbenes and diarylketones were prepared in good to excellent yields.
基金supported by the National Basic Research Program of China(2014CB643501)the National Natural Science Foundation of China(91333204)the support from Ministry of Education and Jiangsu Province(20100092120037,XNY-48-037)
文摘Photovoltaic performance of the organic solar cells (OSCs) based on 2-((5'-(4-((4-((E)-2-(5'-(2,2-dicyanovinyl)-3',4-dihexyl- 2,2'-bithiophen-5-yl)vinyl) phenyl)(phenyl)amino)styryl)-4~4'-dihexyl-2,2'-bithiophen-5-yl)methylene)malononitrile (L(TPA- bTV-DCN)) as donor and PC70BM as acceptor was optimized using 0.25 vol% high boiling point solvent additive of 1-chloronaphthalene (CN), 1,6-hexanedithiol (HDT), or 1,8-diodooctane (DIO). The optimized OSC based on L(TPA-bTV- DCN)-PC70BM (1:2, w/w) with 0.25 vol% CN exhibits an enhanced power conversion efficiency (PCE) of 2.61%, with Voc of 0.87 V, Jsc of 6.95 mA/cm2, and FF of 43.2%, under the illumination of 100 mW/cm2 AM 1.5 G simulated solar light, whereas the PCE of the OSC based on the same active layer without additive is only 1.79%. The effect of the additive on absorption spectra and the atomic force microscopy images of L(TPA-bTV-DCN)-PCv0BM blend films were further investigated. The improved efficiency of the device could be ascribed to the enhanced absorption and optimized domain size in the L(TPA-bTV-DCN)-PC70BM blend film.
基金supported by the Fundamental Research Funds for the Central Universities(08143034)the National Basic Research Program of China(2013CB328705,2013CB328706)the National Natural Science Foundation of China(61275034,61106123)
文摘Iridium complexes with dicyanovinyl-grafted phenylpyridine/l-phenylisoquinoline as ligands are synthesized and their photo- physical, electrochemical, and sensitization properties in DSSCs are investigated. The iridium complexes present significantly enhanced absorption from 400 to 525 nm. The 1-phenylisoquinoline-based iridium complex show bathochromic-shift emission in DMSO solution compared with their phenylpyridine-based counterpart, while their absorption response and photoluminescence peak in solid show little difference despite extension of the conjugated system. Using DSSCs, the conversion efficiency of 0.62% and open-circuit current of 1.4 mA/cm2 is achieved. The poor performance is attributed to the excited-state properties of iridium complexes according to the TD-DFT calculation.