High‐Surface‐Area Porous Platinum Electrodes for Enhanced Charge Transfer
Yelin Hu,Yelin Hu,Aswani Yella,Stefan Guldin,Marcel Schreier,Francesco Stellacci,Michael Grätzel,Morgan Stefik +7 more
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TLDR
In this article, a host-guest architecture is developed that uses an ultrathin layer of platinum deposited upon an electrically conductive scaffold, niobium-doped tin oxide (NTO), which enhances the counter electrode performance of dye-sensitized solar cells.Abstract:
Cobalt-based electrolytes are highly tunable and have pushed the limits of dye-sensitized solar cells, enabling higher open-circuit voltages and new record efficiencies. However, the performance of these electrolytes and a range of other electrolytes suffer from slow electron transfer at platinum counter electrodes. High surface area platinum would enhance catalysis, but pure platinum structures are too expensive in practice. Here, a material-efficient host-guest architecture is developed that uses an ultrathin layer of platinum deposited upon an electrically conductive scaffold, niobium-doped tin oxide (NTO). This nanostructured composite enhances the counter electrode performance of dye-sensitized solar cells (DSCs) using a (CoBPY3)-B-(II/III) electrolyte with an increased fill factor and power conversion efficiency (11.26%), compared to analogous flat films. The modular strategy is elaborated by integrating a light scattering layer onto the counter electrode to reflect unabsorbed light back to the photoanode to improve the short-circuit current density and power conversion efficiency.read more
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Recent advances in alloy counter electrodes for dye-sensitized solar cells. A critical review
TL;DR: In this article, the authors outline the advances of alloy CEs in comparison with other alternatives such as carbonaceous materials and conductive polymers and their hybrids including design concepts, fabrication approaches, and properties.
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Double-Deck Inverse Opal Photoanodes: Efficient Light Absorption and Charge Separation in Heterojunction
TL;DR: In this article, double-deck WO3/BiVO4 inverse opal photoanodes were used for photoelectrochemical cells under simulated solar light and achieved an outstanding photocurrent density of ∼3.3 mA/cm2 at a bias of 1.23 V vs RHE.
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Nitrogen and phosphorus dual-doped graphene as a metal-free high-efficiency electrocatalyst for triiodide reduction
TL;DR: The present results demonstrate that the NPG as a low-cost and high-efficiency electrocatalyst for reduction of I3- will be one of the promising CE materials in DSSCs.
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Construction of efficient counter electrodes for dye-sensitized solar cells: Fe2O3 nanoparticles anchored onto graphene frameworks
TL;DR: In this article, the authors proposed an alternative design for the fabrication of low-cost and Pt-free counter electrodes (CEs) by constructing fast electron transport network and creating highly active sites on the electron pathway using graphene and Fe2O3 nanoparticles.
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SnX (X = S, Se) thin films as cost-effective and highly efficient counter electrodes for dye-sensitized solar cells
TL;DR: Solution-deposited SnSe and SnS thin films demonstrate excellent electrocatalytic activity toward the triiodide reduction in dye-sensitized solar cells (DSCs), even better than that of the conventional noble Pt electrode used in DSCs.
References
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Journal ArticleDOI
Dye-Sensitized Solar Cells
TL;DR: Dye-sensitized solar cells (DSCs) offer the possibilities to design solar cells with a large flexibility in shape, color, and transparency as mentioned in this paper, and many DSC research groups have been established around the world.
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Materials for fuel-cell technologies
TL;DR: Recent progress in the search and development of innovative alternative materials in the development of fuel-cell stack is summarized.
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Porphyrin-Sensitized Solar Cells with Cobalt (II/III)–Based Redox Electrolyte Exceed 12 Percent Efficiency
Aswani Yella,Hsuan-Wei Lee,Hoi Nok Tsao,Chenyi Yi,Aravind Kumar Chandiran,Md. K. Nazeeruddin,Eric Wei-Guang Diau,Chen-Yu Yeh,Shaik M. Zakeeruddin,Michael Grätzel +9 more
TL;DR: In this article, a Co(II/III)tris(bipyridyl)-based redox electrolyte was used in conjunction with a custom synthesized donor-π-bridge-acceptor zinc porphyrin dye as sensitizer (designated YD2-o-C8).
Journal Article
Porphyrin-sensitized solar cells with cobalt (II/III)-based redox electrolyte exceed 12 percent efficiency (vol 334, pg 629, 2011)
TL;DR: Mesoscopic solar cells that incorporate a Co(II/III)tris(bipyridyl)–based redox electrolyte in conjunction with a custom synthesized donor-π-bridge-acceptor zinc porphyrin dye as sensitizer are reported, enabling attainment of strikingly high photovoltages approaching 1 volt.