Entity

Time filter

Source Type


Li Y.,Xian Modern Chemistry Research Institute | Tu D.-H.,Xian Modern Chemistry Research Institute | Gu Y.-J.,Xian Modern Chemistry Research Institute | Wang B.,Xian Modern Chemistry Research Institute | And 3 more authors.
European Journal of Organic Chemistry | Year: 2015

The palladium-catalyzed oxidative Heck reaction of 2,3,3,3-tetrafluoroprop-1-ene with various arylboronic acids was explored for the first time. This method provides a direct route to access (Z)-β-fluoro-β-(trifluoromethyl)styrenes with high stereoselectivity. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source


Guo J.,Key Laboratory of Applied Surface and Colloid Chemistry | Yu B.,Key Laboratory of Applied Surface and Colloid Chemistry | Wang Y.-N.,Key Laboratory of Applied Surface and Colloid Chemistry | Duan D.,Key Laboratory of Applied Surface and Colloid Chemistry | And 3 more authors.
Organic Letters | Year: 2014

A Lewis acid promoted cascade cycloaddition/ring-opening of 2-furylcarbinols with alkyl or aryl azides is described. The reaction features an initial formal [3 + 2] cycloaddition to form a trisubstitued triazole motif, followed by a ring opening of furan to generate the (E)-configuration of the enone. A wide range of highly functionalized triazoles is expediently and efficiently synthesized in a highly step-economical manner. © 2014 American Chemical Society. Source


Zhang Y.,Dalian National Laboratory for Clean Energy | Zhang Y.,Xiamen University | Yu W.,Dalian National Laboratory for Clean Energy | Yu W.,University of Chinese Academy of Sciences | And 11 more authors.
Nano Energy | Year: 2016

In the perovskite/polymer based parallel-like tandem solar cell, the distinctive absorption spectra between the organic-inorganic halide perovskite absorber (CH3NH3PbI3 (MAPI)) and poly-(diketopyrrolopyrrole-terthiophene) (PDPP3T) polymer absorber make it possible to investigate the electronic properties of charge carriers generated in either the perovskite or PDPP3T layer separately. The current density-voltage (J-V) curves of the device are measured under the monochromatic LED irradiation at significantly different wavelengths to confirm the charge carrier generated in MAPI offer higher Voc. The voltage biased external quantum efficiency (EQE) measurement is employed to understand the charge transport mechanism in the system. The J-V curves and EQE data confirm that charge carriers generated by the photons absorbed in the perovskite layer or in PDPP3T behave independently. Compared with the bulk heterojunction structure, this parallel-like tandem structure increases Voc while reducing thermalization loss, providing a possibility to break the traditional Shockley-Queisser (S-Q) limit set for single junction devices. © 2015 Elsevier Ltd. Source


Zhao W.,Key Laboratory of Applied Surface and Colloid Chemistry | Zhao W.,Ningxia Teachers University | Ma Q.,Key Laboratory of Applied Surface and Colloid Chemistry | Li L.,Key Laboratory of Applied Surface and Colloid Chemistry | And 2 more authors.
Journal of Adhesion Science and Technology | Year: 2014

Surface roughness of acrylonitrile-butadiene-styrene (ABS) resin prior to metallization is treated generally with sulphuric/chromic acid system. However, the presence of chrominum (VI) ion imposes serious environmental problems. In this work, TiO2 photocatalytic treatment was used to enhance the adhesion strength between the ABS surface and the electroless copper film. Effects of the TiO2 content, irradiation time and UV power upon the surface topography, surface characterization and the adhesion strength were investigated. The results indicated that the surface hydrophilicity of ABS resin and the adhesion strength between the electroless copper film and ABS surface increased with an increase in the UV power and a prolongation in irradiation time, and did not increase linearly with an increase of TiO2 content. Though the surface topography of ABS changed little, the adhesion strength reached 1.25 kN/m, which was higher than that in the optimal H 2SO4-MnO2colloid. The surface chemistry results indicated that -COOH and -OH groups formed with the photocatalytic treatment and the absorption strengths increased with the UV power. XPS analysis results further demonstrated that the contents of C=O and -COOH reached 6.4 and 4.9% with the photocatalytic treatment, which was much higher than that of the H 2SO4-MnO2 colloid (3.9 and 3.1%). The high contents of C=O and -COOH groups enhanced the surface hydrophilicity of the ABS resin and improved the adhesion strength between the electroless copper film and ABS resin. The results indicated that the photocatalytic treatment was an environment-friendly and effective method to replace the commercial wet chemical process for ABS surface modification. © 2013 Taylor & Francis. Source


Qin W.,CAS Dalian Institute of Chemical Physics | Qin W.,University of Chinese Academy of Sciences | Yu W.,CAS Dalian Institute of Chemical Physics | Yu W.,University of Chinese Academy of Sciences | And 13 more authors.
Journal of Materials Chemistry A | Year: 2014

Organic/amorphous silicon (a-Si) hybrid tandem solar cells have the potential to provide a highly efficient low-cost photovoltaic technology using abundant elements, and the technology is adaptable to large-scale processes. With their high open-circuit voltage (Voc) and adaptability to a broad solar spectrum, organic/a-Si tandem devices offer significantly improved performance. We have shown that organic/a-Si hybrid tandem solar cells with a complementary organic absorber can exhibit a power conversion efficiency (PCE) of up to 7.5%, with a fill factor (FF) of 72.3% and a Voc almost equivalent to the sum of the sub-cells under standard air mass (AM) 1.5 illumination. The high performance of the device results from the complementary absorption spectra of two sub-cells and well-matched energy levels of the intermediate layer. This study provides an effective design strategy for organic/a-Si hybrid tandem solar cells of improved efficiency. © the Partner Organisations 2014. Source

Discover hidden collaborations