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Analyses of structurally modified quasi‐solid‐state electrolytes using electrochemical impedance spectroscopy for dye‐sensitized solar cells 下载免费PDF全文
Seok‐Jun Seo Andreas Hinsch Welmoed Veurman Henning Brandt Moon‐Sung Kang Sung‐Hee Shin Seung‐Hyeon Moon 《应用聚合物科学杂志》2014,131(1)
Electrochemical properties of structurally modified quasi‐solid‐state electrolytes were examined using porous substrates (PSs). The PS was prepared into two categories by a phase inversion method with a brominated poly(phenylene oxide) (BPPO): the sponge and finger types. Effects of the humidification and cosolvent compositions on the morphology of the PS were analyzed by scanning electron microscopy. In all cases of the PSs, a higher VOC was observed of about 0.1 V than that of a liquid electrolyte owing to a suppressed back electron charge transfer. In addition, the PS prepared by the polymer solution of 1 : 4 : 1 (BPPO : N‐methyl‐2‐pyrrolidone : butyl alcohol) with the humidification process showed better photovoltaic properties in terms of the current density and conversion efficiency owing to the appropriate combinations of pore size, tortuosity, and interconnectivity. Effects of the pore structures were intensively examined using electrochemical impedance spectroscopy. The impedance results revealed that large pores at the surface layers are advantageous for a lower RS and RTiO2. Meanwhile, the straight inner structure is beneficial for the facile I?/I3? diffusion, thus lowering RPt. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131, 39739. 相似文献
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Andreas Hinsch Henning Brandt Welmoed Veurman Simon Hemming Mathias Nittel Uli Würfel Piotr Putyra Claus Lang-Koetz Matthias Stabe Severin Beucker Klaus Fichter 《Solar Energy Materials & Solar Cells》2009,93(6-7):820-824
With respect to a first market introduction, one advantage of dye solar cell (DSC) modules is the combination of photovoltaic (PV) solar electricity with decorative aspects. We report on the recent results achieved in the frame of the German project ColorSol. The project focuses on the application field of building-integrated PVs (facades, PV-glazing, etc.). Design concepts, as well as scenarios for the application of the DSC technology in architecture and facade planning are developed and the application potential is quantified in cooperation with potential users. Prototypes of glass facade elements (70 cm×200 cm) have been developed which consist of several serially interconnected DSC modules each with a size of 30 cm×30 cm. The results of module characteristics under various outdoor illumination conditions and under partial shading are reported. Visual impressions of the DSC facade elements are presented. 相似文献
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M. M. Mandoc W. Veurman L. J. A. Koster B. de Boer P. W. M. Blom 《Advanced functional materials》2007,17(13):2167-2173
The photogeneration mechanism in blends of poly[2‐methoxy‐5‐(3′,7′‐dimethyloctyloxy)‐1,4‐phenylene vinylene] (MDMO‐PPV) and poly[oxa‐1,4‐phenylene‐(1‐cyano‐1,2‐vinylene)‐(2‐methoxy‐5‐(3′,7′‐dimethyloctyloxy)‐1,4‐phenylene)‐1,2‐(2‐cyanovinylene)‐1,4‐phenylene] (PCNEPV) is investigated. The photocurrent in the MDMO‐PPV:PCNEPV blends is strongly dependent on the applied voltage as a result of a low dissociation efficiency of the bound electron–hole pairs. The dissociation efficiency is limited by low carrier mobilities, low dielectric constant, and the strong intermixing of the polymers, leading to a low fill factor and a reduced photocurrent at operating conditions. Additionally, electrons trapped in the PCNEPV phase recombine with the mobile holes in the MDMO‐PPV phase at the interface between the two polymers, thereby affecting the open‐circuit voltage and increasing the recombination losses. At an intensity of one sun, Langevin recombination of mobile carriers dominates over trap‐assisted recombination. 相似文献
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Mateja Hočevar Urša Opara Krašovec Matevž Bokalič Marko Topič Welmoed Veurman Henning Brandt Andreas Hinsch 《Journal of Industrial and Engineering Chemistry》2013,19(5):1464-1469
A simple manufacturing process based on screen-printing is crucial for a successful commercialization of dye-sensitized solar cells (DSSCs). We developed the sol–gel based TiO2 paste in such a way that solely a single step deposition is sufficient to realize a sponge-like structure of the layer assuring its high activity in DSSCs. For the first time the sol–gel based TiO2 paste was screen printed and tested in DSSC masterplates and PV mini-modules. Electroluminescence imaging of the mini-module proved layer homogeneity and no manufacturing defects. The conversion efficiency of the PV mini-module with the active area of 75 cm2 reaches 5.7% at STC. 相似文献
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