Superior Catalytic Activity of Sub‐5 μm‐Thick Pt/SiC Films as Counter Electrodes for Dye‐Sensitized Solar Cells

Yun, Sining; Hagfeldt, Anders; Ma, Tingli

doi:10.1002/cctc.201402003

Cited by 57 publications

(13 citation statements)

References 40 publications

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“…It is should be noted that many transition‐metal compounds (oxides, nitrides, carbides, sulfides, selenides, phosphide, etc.) have been applied as counter electrodes in dye‐sensitized solar cells (DSSCs) . Superior conductivity is highly desired for counter electrodes in DSSCs.…”

Section: Resultsmentioning

confidence: 99%

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III‐Nitride Polymorphs: XN (X=Al, Ga, In) in the Pnma Phase

Fan

Zhang

Yun

et al. 2018

Chemistry A European J

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The structural, mechanical, elastic anisotropy, and electronic properties, together with the stability, effective mass of holes and electrons for XN (X=Al, Ga, In) in the Pnma phase are investigated by using density functional theory calculations. The elastic constants and the phonon spectra all manifest III-nitride polymorphs: XN (X=Al, Ga, In) in the Pnma phase in this work are mechanically and dynamically stable at ambient pressure. Al atoms, Ga atoms, and In atoms lead to new electrical and band-gap properties: XN (X=Al, Ga, In) in the Pnma phase are all semiconductor materials with direct band gaps of 4.76 eV, 2.80 eV, and 0.66 eV, respectively, which present great application potentials in the new generation electronic devices such as ultraviolet detectors, visible light detectors, infrared detectors, violet-light diodes, and light-emitting diodes.

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Section: Resultsmentioning

confidence: 99%

“…have been applied as counter electrodes in dye-sensitized solar cells (DSSCs). [43][44][45][46][47][48][49][50] Superior conductivity is highly desired for counter electrodes in DSSCs. Transition metal nitrides as counter electrodes have been successfully applied in DSSCs.…”

Section: Resultsmentioning

confidence: 99%

III‐Nitride Polymorphs: XN (X=Al, Ga, In) in the Pnma Phase

Fan

Zhang

Yun

et al. 2018

Chemistry A European J

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“…4a), the CE catalyst promotes the electron transfer from the external circuit back into the electrolyte, and catalyzes I 3 À reduction at the CE/electrolyte interface, which has been extensively reviewed. 25,82,83,[94][95][96][97][98][99][100] The Pt electrode, which is so far the most optimized component matching the I-based DSSCs, is the preferred CE material owing to its superior catalytic activity and electrical conductivity. However, the Pt electrode faces the following serious challenges: (i) the high cost and the limited supply worldwide cannot meet the increasing demands for a broad range of applications in different fields involving catalysis; 101 (ii) the Pt electrode is easily corroded by the I-based electrolyte in liquid-state DSSCs; 102 (iii) Pt as a CE in DSSCs is Energy & Environmental Science Review not effective for the I-free redox couple (such as Co 3+ /Co 2+ and T 2 /T À ) electrolyte and polysulfide electrolytes used in quantum dot solar cells; [103][104][105] (iv) the Pt electrode can be poisoned by air components; 106 carbides, sulfides, selenides, tellurides and phosphides, conducting polymers (PEDOT, PEDOT:PSS, PANI, PProDOT, PProDOT-Et 2 , PPy, etc.…”

Section: Pt Challengementioning

confidence: 99%

Stability assessment of alternative platinum free counter electrodes for dye-sensitized solar cells

Yun

Lund

Hinsch

2015

Energy Environ. Sci.

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110

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Platinum (Pt)-free counter electrodes (CEs) are economical alternative components of dye-sensitized solar cells (DSSCs) that have attracted much interest and become the focus of research, with an increasingly large number of scientific papers published in the last two decades. The development of these CE materials was driven mainly by desires to overcome the disadvantages of Pt, as follows: high cost, scarcity, corrosion by the I3\u7f/I\u7f redox couple electrolyte, and mismatch or non-effectivity in the I-free redox couple electrolyte. Although much more is now known about the principal physicochemical processes that occur during CE operation of the DSSC, the stability issues associated with CEs have not been matched by the exponential increase in CE research effort. This raises questions regarding the stability of the CEs whether the present research is sufficiently addressing the stability issues that limit DSSC performance. This review attempts to identify some of the key techniques that evaluate CE stability in DSSCs through a selective presentation of recent research highlights. Classical approaches could effectively assess the probability of using alternative Pt-free CE materials for commercial application, which offer strategies to overcome the current stability stalemate

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“…Typically, Pt catalyst is preferred as a CE due to its super‐electrocatalytic activity towards triiodide reduction and high electrical conductivity . However, the economic perspective (ie, one of the rare elements in the earth) and low chemical stability (ie, corrosion by I − /I 3 − redox couple under light illumination) of the Pt‐based devices remain as challenges . Besides, compatibility of Pt with various kinds of electrolytes and dyes is another factor that still needed to be overcome.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of low‐cost low‐temperature carbon‐based counter electrode with an outstanding fill factor of 73% for dye‐sensitized solar cells

et al. 2020

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Summary Developing chemically inert, electrically conductive, and catalytically active counter electrodes (CEs) to replace conventional Pt‐based ones is highly desirable for dye‐sensitized solar cells. Herein, we reported a facile, cost‐effective, and low‐temperature synthesis pathway to develop carbon‐based CEs. The performance of homemade carbon paste (H‐CP)–based CE (H‐CE) was compared with that of commercial carbon paste (C‐CP)–based CE (C‐CE) and Pt‐based CE (Pt‐CE). The scanning electron microscope (SEM) results showed that H‐CE demonstrated a penetrable surface structure which facilitates the diffusion of electrolyte through the carbon electrode. This phenomenon enhanced the triiodide reduction with respect to C‐CE having a compact structure that limits the electrolyte diffusion. The charge transfer properties and catalytic activities of the investigated devices were explored using electrochemical impedance spectroscopy and Tafel polarization measurements; the obtained results indicated that the device based on H‐CE revealed relatively lower charge transfer resistance and higher exchange current density compared with C‐CE‐based device. The current‐voltage measurements showed that the device based on H‐CE has a power conversion efficiency of 2.70%, which was about 1.6 times higher than that of the device based on C‐CE (1.68%). Furthermore, a fill factor of 73% was achieved for the device based on H‐CE, which outperformed the Pt‐based device (69%) and was among one of the highest values obtained in the literature. Also, a tape adhesion test performed on H‐CP‐coated glass substrate displayed its excellent robustness.

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Superior Catalytic Activity of Sub‐5 μm‐Thick Pt/SiC Films as Counter Electrodes for Dye‐Sensitized Solar Cells

Cited by 57 publications

References 40 publications

III‐Nitride Polymorphs: XN (X=Al, Ga, In) in the Pnma Phase

III‐Nitride Polymorphs: XN (X=Al, Ga, In) in the Pnma Phase

Stability assessment of alternative platinum free counter electrodes for dye-sensitized solar cells

Facile fabrication of low‐cost low‐temperature carbon‐based counter electrode with an outstanding fill factor of 73% for dye‐sensitized solar cells

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