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Xi Fan Chaohua Cui Guojia Fang Jinzhao Wang Songzhan Li Fei Cheng Hao Long Yongfang Li 《Advanced functional materials》2012,22(3):585-590
Polymer solar cells (PSCs) with poly(3‐hexylthiophene) (P3HT) as a donor, an indene‐C70 bisadduct (IC70BA) as an acceptor, a layer of indium tin oxide modified by MoO3 as a positive electrode, and Ca/Al as a negative electrode are presented. The photovoltaic performance of the PSCs was optimized by controlling spin‐coating time (solvent annealing time) and thermal annealing, and the effect of the spin‐coating times on absorption spectra, X‐ray diffraction patterns, and transmission electron microscopy images of P3HT/IC70BA blend films were systematically investigated. Optimized PSCs were obtained from P3HT/IC70BA (1:1, w/w), which exhibited a high power conversion efficiency of 6.68%. The excellent performance of the PSCs is attributed to the higher crystallinity of P3HT and better a donor–acceptor interpenetrating network of the active layer prepared under the optimized conditions. In addition, PSCs with a poly(3,4‐ethylenedioxy‐thiophene):poly(styrenesulfonate) (PEDOT:PSS) buffer layer under the same optimized conditions showed a PCE of 6.20%. The results indicate that the MoO3 buffer layer in the PSCs based on P3HT/IC70BA is superior to that of the PEDOT:PSS buffer layer, not only showing a higher device stability but also resulting in a better photovoltaic performance of the PSCs. 相似文献
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采用三维激光扫描技术,结合逆向软件Geomagic Studio和三维设计软件CATIA对汽车座椅进行逆向设计.首先介绍了汽车座椅的三维扫描、数据采集和点云处理过程,然后进行曲面设计和数字化建模,获取汽车座椅的三维和二维图形,最后探讨了两种3D打印模式在汽车座椅快速成型上的应用,证实了三维扫描和3D打印在汽车座椅逆向设计及制造中的可行性. 相似文献
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Xi Fan Guojia Fang Shishang Guo Nishuang Liu Huimin Gao Pingli Qin Songzhan Li Hao Long Qiao Zheng Xingzhong Zhao 《Nanoscale research letters》2011,6(1):546
Flake-like Al-doped ZnO (AZO) nanostructures including dense AZO nanorods were obtained via a low-temperature (100°C) hydrothermal process. By doping and varying Al concentrations, the electrical conductivity (σ) and morphology of the AZO nanostructures can be readily controlled. The effect of σ and morphology of the AZO nanostructures on the performance of the inverted organic solar cells (IOSCs) was studied. It presents that the optimized power conversion efficiency of the AZO-based IOSCs is improved by approximately 58.7% compared with that of un-doped ZnO-based IOSCs. This is attributed to that the flake-like AZO nanostructures of high σ and tunable morphology not only provide a high-conduction pathway to facilitate electron transport but also lead to a large interfacial area for exciton dissociation and charge collection by electrodes. 相似文献
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Liu Kan Xiang Jianzhen Ai Zhao Zhang Shoukun Fang Yi Chen Ting Zhou Qiongwei Li Songzhan Wang Shengxiang Zhang Nangang 《Microsystem Technologies》2017,23(6):1937-1942
A new PMMA microfluidic chip fabrication method by combining laser ablation technology with low-temperature bonding using optically clear adhesive (OCA) film and liquid optically clear adhesive (LOCA) was presented in this paper. The deformation and clogging issues of the microfluidic channel were well solved. The effective bonding area ratio of microfluidic chips could be greatly improved by adjusting bonding temperature and bonding time. The crevices around the microchannels were effectively eliminated by coating treatment of LOCA. The bonding strength and waterproof of PMMA microfluidic chips coating with/without LOCA were also evaluated in this paper.
相似文献6.
Rational Construction of Hollow Core‐Branch CoSe2 Nanoarrays for High‐Performance Asymmetric Supercapacitor and Efficient Oxygen Evolution
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Tian Chen Songzhan Li Jian Wen Pengbin Gui Yaxiong Guo Cao Guan Jinping Liu Guojia Fang 《Small (Weinheim an der Bergstrasse, Germany)》2018,14(5)
Metal selenides have great potential for electrochemical energy storage, but are relatively scarce investigated. Herein, a novel hollow core‐branch CoSe2 nanoarray on carbon cloth is designed by a facile selenization reaction of predesigned CoO nanocones. And the electrochemical reaction mechanism of CoSe2 in supercapacitor is studied in detail for the first time. Compared with CoO, the hollow core‐branch CoSe2 has both larger specific surface area and higher electrical conductivity. When tested as a supercapacitor positive electrode, the CoSe2 delivers a high specific capacitance of 759.5 F g?1 at 1 mA cm?2, which is much larger than that of CoO nanocones (319.5 F g?1). In addition, the CoSe2 electrode exhibits excellent cycling stability in that a capacitance retention of 94.5% can be maintained after 5000 charge–discharge cycles at 5 mA cm?2. An asymmetric supercapacitor using the CoSe2 as cathode and an N‐doped carbon nanowall as anode is further assembled, which show a high energy density of 32.2 Wh kg?1 at a power density of 1914.7 W kg?1, and maintains 24.9 Wh kg?1 when power density increased to 7354.8 W kg?1. Moreover, the CoSe2 electrode also exhibits better oxygen evolution reaction activity than that of CoO. 相似文献
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Fully High‐Temperature‐Processed SnO2 as Blocking Layer and Scaffold for Efficient,Stable, and Hysteresis‐Free Mesoporous Perovskite Solar Cells
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Liangbin Xiong Minchao Qin Cong Chen Jian Wen Guang Yang Yaxiong Guo Junjie Ma Qi Zhang Pingli Qin Songzhan Li Guojia Fang 《Advanced functional materials》2018,28(10)
Planar perovskite solar cells (PSCs) based on low‐temperature‐processed (LTP) SnO2 have demonstrated excellent photovoltaic properties duo to the high electron mobility, wide bandgap, and suitable band energy alignment of LTP SnO2. However, planar PSCs or mesoporous (mp) PSCs based on high‐temperature‐processed (HTP) SnO2 show much degraded performance. Here, a new strategy with fully HTP Mg‐doped quantum dot SnO2 as blocking layer (bl) and a quite thin SnO2 nanoparticle as mp layer are developed. The performances of both planar and mp PSCs has been greatly improved. The use of Mg‐SnO2 in planar PSCs yields a high‐stabilized power conversion efficiency (PCE) of close to 17%. The champion of mp cells exhibits hysteresis free and stable performance with a high‐stabilized PCE of 19.12%. The inclusion of thin mp SnO2 in PSCs not only plays a role of an energy bridge, facilitating electrons transfer from perovskite to SnO2 bl, but also enhances the contact area of SnO2 with perovskite absorber. Impedance analysis suggests that the thin mp layer is an “active scaffold” selectively collecting electrons from perovskite and can eliminate hysteresis and effectively suppress recombination. This is an inspiring advance toward high‐performance PSCs with HTP mp SnO2. 相似文献
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Influence of deposition parameters on preferred orientation of RF magnetron sputtered BST thin films
Songzhan Li Yanqin Yang L. Liu T. J. Zhang W. H. Huang 《Journal of Materials Science: Materials in Electronics》2008,19(3):223-226
Ba0.65Sr0.35TiO3 (BST) thin films have been deposited by radio frequency magnetron sputtering. The effects of the deposition parameters on
the crystallization and microstructure of BST thin films were investigated by X-ray diffraction and field emission scanning
electron microscopy, respectively. The crystallization behavior of these films was apparently affected by the substrate temperature,
annealing temperature and sputtering pressure. The as-deposited thin films at room temperature were amorphous. However, the
improved crystallization is observed for BST thin films deposited at higher temperature. As the annealing temperature increased,
the dominant X-ray diffraction peaks became sharper and more intense. The dominant diffraction peaks increased with the sputtering
pressures increasing as the films deposited at 0.37–1.2 Pa. With increasing the sputtering pressure up to 3.9 Pa, BST thin
films had the (110) + (200) preferred orientation. Possible correlations of the crystallization with changes in the sputtering
pressure were discussed. The SEM morphologies indicated the film was small grains, smooth, and the interface between the film
and the substrate was sharp and clear. 相似文献
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