Electrophoretic deposition of Pt nanoparticles on plastic substrates as counter electrode for flexible dye-sensitized solar cells

Yin, Xiuli; Xue, Zhaosheng; Liu, Bin

doi:10.1016/j.jpowsour.2010.09.047

Cited by 86 publications

(61 citation statements)

References 21 publications

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“…Two semicircles are observed for all electrodes. According to previous reports [7,10,15,[35][36][37], the left semicircle (high frequency arc) is attributed to the charge transfer resistance (RCT) at the interface of electrode/electrolyte interface, which reflects the catalytic activity of electrodes on triiodide reduction; the right semicircle (low frequency arc) is ascribed to the Nernst diffusion impedance (ZN) of redox couple within the electrolyte. Additionally, the intercept on the real axis in the high-frequency region is attributed to the series resistance of the device, RS.…”

Section: Resultsmentioning

confidence: 90%

Hydrothermal growth of MoS2/Co3S4 composites as efficient Pt-free counter electrodes for dye-sensitized solar cells

Dong

Guo

et al. 2017

Sci. China Mater.

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MoS2/Co3S4 composite films were prepared via a facile one-step hydrothermal method, and used as efficient and low-cost Pt-free counter electrodes (CEs) for dye-sensitized solar cells (DSSCs). Characterizations revealed that Co3S4 and MoS2 were obtained simultaneously during the facile hydrothermal process. The composites afforded a promising synergistic effect on the catalyzing of triiodide reduction. Enhanced electrocatalytic performance of the resultant composite films was confirmed through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) analyses. DSSCs using MoS2/Co3S4 composite CEs outperform the devices with pristine MoS2 or Co3S4 CEs in power conversion efficiency (PCE). Furthermore, a PCE of 6.77% is obtained for the optimized devices using MoS2/Co3S4 composite CEs measured under standard 1 sun illumination (100 mW cm −2 , AM 1.5G), which is comparable to that of the devices fabricated under the same conditions with conventional thermally deposited Pt CEs (7.14%). The results demonstrate that MoS2/Co3S4 composites are promising alternatives to Pt to be applied as CEs for DSSCs.

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Section: Resultsmentioning

confidence: 90%

Hydrothermal growth of MoS2/Co3S4 composites as efficient Pt-free counter electrodes for dye-sensitized solar cells

Dong

Guo

et al. 2017

Sci. China Mater.

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“…In addition, the response at frequencies between 0.05 and 1 Hz is related to the diffusion process of I -/I 3 -in the electrolyte (Z N ) [29,34]. Z N is virtually overlapped by R CT2 due to the liquid electrolyte and thin spacer film used in the experiment [14,29,34]. It is obvious that the EIS arcs are significantly decreased after the compression posttreatment.…”

Section: Photovoltaic Performance Of Zno-based Dscsmentioning

confidence: 96%

“…The applied bias voltage was set at the open-circuit voltage of the DSC and the corresponding ac amplitude was 10 mV. The impedance spectra were analyzed using an equivalent circuit model [14,29]. Nano Res.…”

Section: Characterizationmentioning

confidence: 99%

“…A typical DSC consists of a dye-sensitized photoanode, a Pt-loaded counter counter electrode materials [11][12][13][14]. The nanoporous film of the photoanode is a crucial part of the DSCs as far as achieving high power conversion efficiency is concerned, because it provides a large surface area for adsorbing sufficient dye for photon capture and electron-hole pair generation.…”

Section: Introductionmentioning

confidence: 99%

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Facile synthesis of ZnO nanocrystals via a solid state reaction for high performance plastic dye-sensitized solar cells

Yin

Wang

et al. 2011

Nano Res.

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We report the facile synthesis of ZnO nanocrystals via a one-step solid state reaction at room temperature and their application as the photoanode in plastic dye-sensitized solar cells (DSCs). ZnO nanoparticles were prepared utilizing zinc acetate dihydrate and sodium hydroxide with a short grinding time and without a sintering process. The as-prepared samples with the polycrystalline hexagonal wurtzite structure were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The obtained ZnO nanoparticles exhibited high crystallinity even without a high temperature sintering treatment during the preparation process. The effects of compression post-treatment on the photovoltaic performance of DSCs were also investigated using intensity modulated photocurrent spectroscopy (IMPS), incident photo-to-current conversion efficiency (IPCE), and electrochemical impedance spectroscopy (EIS). The results indicate that the improvement of power conversion efficiency after compression post-treatment of ZnO photoelectrode can be attributed to its high photoelectron collection efficiency and effective electron transport. Under the optimized conditions, a full plastic D149-sensitized ZnO solar cell measured under illumination of 100 mW·cm -2 (AM 1.5G) presents an energy conversion efficiency of 3.76% with open-circuit voltage of 0.688 V, short-circuit current density of 8.55 mA·cm -2 , and fill factor of 0.64. These results demonstrate that the one-step solid state reaction is a convenient and effective method for the synthesis of ZnO nanocrystals for use in plastic DSCs.

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“…The material used as counter electrode is dependent on the redox couple used. A thin film of platinum (Pt) deposited on conducting glass is currently used as standard counter electrode for DSSCs, due to its outstanding electrocatalytic properties in the reduction of I À 3 species and exchange current density [2][3][4][5]. The incident photons cause the promotion of excited electron from highest occupied molecular orbital (HOMO) to lowest unoccupied molecular orbital (LUMO) levels of dye molecules.…”

Section: Introductionmentioning

confidence: 99%

Pulsed-laser-ablation based nanodecoration of multi-wall-carbon nanotubes by Co–Ni nanoparticles for dye-sensitized solar cell counter electrode applications

Imbrogno

Pandiyan

Barberio

et al. 2017

Mater Renew Sustain Energy

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We report here on the use of pulsed KrF-laser deposition technique (PLD) for the decoration of Multiwall carbon nanotubes (MWCNTs) by Co-Ni nanoparticles (NPs) to form highly efficient counter electrodes (CEs) for use in Dye-sensitized solar cells (DSSC). By varying the number of laser ablation pulses (N LP = 500-60,000) of the KrF laser, we were able to control the average size of the Co-Ni NPs and the surface coverage of the MWCNTs by the nanoparticles. The PLD-based decoration of MWCNTs by Co-Ni NPs is shown to form novel counter electrodes, which significantly enhance the power conversion efficiency (PCE) of the DSSCs. Indeed, the DSSCs based on the PLD-decorated Co-Ni counter electrodes (obtained at the optimal N LP = 40,000) are shown to exhibit a PCE value as high as 6.68%, with high short circuit current (J sc = 14.68 mA/cm2 ) and open circuit voltage (V oc = 0.63 V). This represents a PCE improvement of *190% in comparison to the DSSCs with pristine MWCNTs (PCE = 2.3%) and *7.4% PCE increase than that of the conventional DSSC made with a sputtered Platinum-based counter electrode. By systematically investigating the local nanostructure of the Co-Ni decorated CEs, we found that the Co-Ni NPs layer exhibits a porous cauliflower-like morphology, of which surface roughness (RMS) is N LP dependent. Interestingly, both PCE and roughness of the Co-Ni NPs layer are found to exhibit the same N LP dependence, with a maximum located around the optimal N LP value of 40,000. This enabled us to establish, for the first time, a linear correlation between the achieved PCE of DSSCs and the local roughness of their CEs decorated by Co-Ni NPs. Such a correlation highlights the importance of maximizing the surface area of the CoNi coated MWCNTs on the CEs to enhance the PCE of the DSSCs. Finally, Ultra-violet Photoelectron Spectroscopy (UPS) measurements revealed a significant decrease in the local work function (U) of Co-Ni NPs decorated MWCNTs based CEs (at N LP = 40,000, U = 3.9 eV) with respect to that of either pristine MWCNTs (U = 4.8 eV) or sputtered-Pt (U = 4.3 eV) counter-electrodes. This U lowering of the Co-Ni/MWCNTs based CEs is an additional advantage to enhance the catalytic reaction of the redox couple of the electrolyte solution, and improve thereby the PCE of the DSSCs.

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Electrophoretic deposition of Pt nanoparticles on plastic substrates as counter electrode for flexible dye-sensitized solar cells

Cited by 86 publications

References 21 publications

Hydrothermal growth of MoS2/Co3S4 composites as efficient Pt-free counter electrodes for dye-sensitized solar cells

Hydrothermal growth of MoS2/Co3S4 composites as efficient Pt-free counter electrodes for dye-sensitized solar cells

Facile synthesis of ZnO nanocrystals via a solid state reaction for high performance plastic dye-sensitized solar cells

Pulsed-laser-ablation based nanodecoration of multi-wall-carbon nanotubes by Co–Ni nanoparticles for dye-sensitized solar cell counter electrode applications

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