Porphyrin-Sensitized Solar Cells with Cobalt (II/III)–Based Redox Electrolyte Exceed 12 Percent Efficiency

  title={Porphyrin-Sensitized Solar Cells with Cobalt (II/III)–Based Redox Electrolyte Exceed 12 Percent Efficiency},
  author={Aswani Yella and Hsuan‐Wei Lee and Hoi Nok Tsao and Chenyi Yi and Aravind Kumar Chandiran and Md. K. Nazeeruddin and Eric Wei‐Guang Diau and Chen‐Yu Yeh and Shaik Mohammed Zakeeruddin and Michael Gr{\"a}tzel},
  pages={629 - 634}
Simultaneous modification of the dye and redox shuttle boosts the efficiency of a dye-sensitized solar cell. The iodide/triiodide redox shuttle has limited the efficiencies accessible in dye-sensitized solar cells. Here, we report 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 (designated YD2-o-C8). The specific molecular design of YD2-o-C8 greatly… 

High-Performance Porphyrin-Based Dye-Sensitized Solar Cells with Iodine and Cobalt Redox Shuttles.

High-performance DSSCs are reported based on a new donor-π-acceptor sensitizer FW-1, 7H-dibenzo-substituted and fused zinc porphyrin, co-sensitized with a benzotriazole-containing dye in iodine and cobalt redox systems and high PCEs of 10.21 and 10.42% were obtained.

Photovoltaic Performance of Triphenylamine Dyes‐sensitized Solar Cells Employing Cobalt Redox Shuttle and Influence of π‐conjugated Spacers

Developing photosensitizers suitable for the cobalt electrolyte and understanding the structure‐property relationship of organic dyes is warranted for the dye‐sensitized solar cells (DSSCs). The

Cobalt Redox Electrolytes in Dye-Sensitized Solar Cells : Overview and Perspectives

Dye-sensitized solar cells (DSSCs), developed two decades ago, are considered to be an attractive technology among various photovoltaic devices because of their low cost, accessible dye chemistry,

Aqueous dye-sensitized solar cell electrolytes based on the cobalt(II)/(III) tris(bipyridine) redox couple

In this study, we report the first application of a cobalt(II)/(III) tris(2,2′-bipyridine) based aqueous electrolyte in the fabrication of dye-sensitized solar cells. An improvement in short circuit

Porphyrin Dye-Sensitized Zinc Oxide Aggregated Anodes for Use in Solar Cells

The short-circuit current density (Jsc) and efficiency of the YD2-o-C8-TBA-sensitized ZnO DSSC are enhanced due to the improvement of the incident-photon-to-current efficiency (IPCE) values in the wavelength range of 400–450 nm.

Introducing manganese complexes as redox mediators for dye-sensitized solar cells.

The development of a DSC electrolyte based on the tris(acetylacetonato)manganese(iii)/(iv), [Mn(acac)3](0/1+), redox couple is reported, which exhibits higher incident photon to current conversion efficiencies (IPCEs) than K4.

Efficient Dye-Sensitized Solar Cells with Voltages Exceeding 1 V through Exploring Tris(4-alkoxyphenyl)amine Mediators in Combination with the Tris(bipyridine) Cobalt Redox System

Tandem redox electrolytes, prepared by the addition of a tris(p-anisyl)amine mediator into classic tris(bipyridine)cobalt-based electrolytes, demonstrate favorable electron transfer and reduced

Dual Functional Polymer Interlayer for Facilitating Ion Transport and Reducing Charge Recombination in Dye-Sensitized Solar Cells.

A new DSSC architecture with a novel dual-functional polymer interlayer that prevents charge recombination and facilitates ionic conduction, as well as maintaining dye loading and regeneration is proposed and is a promising candidate for improving the performance of DSSCs.

Conformational engineering of co-sensitizers to retard back charge transfer for high-efficiency dye-sensitized solar cells

We demonstrate that the post-adsorption of small molecules (a phenothiazine-based dye) on the porphyrin-sensitized TiO2 anode surface plays dual roles: (1) to greatly retard the back reaction between



Characteristics of the iodide/triiodide redox mediator in dye-sensitized solar cells.

The iodide/triiodide redox couple has good solubility, does not absorb too much light, has a suitable redox potential, and provides rapid dye regeneration, and it is expected that overall efficiencies above 15% might be achieved if half of this internal potential loss could be gained.

Design of organic dyes and cobalt polypyridine redox mediators for high-efficiency dye-sensitized solar cells.

Dye-sensitized solar cells (DSCs) with cobalt-based mediators with efficiencies surpassing the record for DSCs with iodide-free electrolytes were developed by selecting a suitable combination of a

Efficient Light‐Harvesting Layers of Homeotropically Aligned Porphyrin Derivatives

The dye-sensitized solar cell, based on a wide-bandgap semiconductor photosensitized with an organic dye, is an attractive low-cost alternative to conventional silicon-based solar cells. Absorption

An alternative efficient redox couple for the dye-sensitized solar cell system.

A series of new cobalt complexes synthesized and evaluated as redox mediators for dye-sensitized nanocrystalline TiO(2) solar cells yielded incident photon-to-current conversion efficiencies (IPCE) of up to 80% and the one-electron-transfer redoxmediator performed best among the compounds investigated.

CoII(dbbip)22+ Complex Rivals Tri-iodide/Iodide Redox Mediator in Dye-Sensitized Photovoltaic Cells

Transient absorption spectroscopy was employed to study charge-transfer dynamics in dye-sensitized nanocrystalline solar cells (DSSC) containing a new one-electron redox mediator,

High-efficiency dye-sensitized solar cells with ferrocene-based electrolytes.

Dye-sensitized solar cells based on iodide/triiodide (I(-)/I(3)(-)) electrolytes are viable low-cost alternatives to conventional silicon solar cells. However, as well as providing record

An organic redox electrolyte to rival triiodide/iodide in dye-sensitized solar cells.

A novel, iodide-free redox electrolyte in conjunction with a sensitized heterojunction that has negligible absorption in the visible spectral range is presented, a very attractive feature for flexible DSCs that use transparent conductors as current collectors.

Substituted polypyridine complexes of cobalt(II/III) as efficient electron-transfer mediators in dye-sensitized solar cells.

The best mediator, based on tris(4,4'-di-tert-butyl-2,2'-dipyridyl)cobalt(II/III) perchlorate, resulted in DSSCs exhibiting efficiencies within 80% of that of a comparable iodide/triiodide-mediated DSSC, representing a nonvolatile, noncorrosive, and practical alternative as an efficient electron-transfer mediator in D SSCs.

Efficient Dye-Sensitized Solar Cells with an Organic Photosensitizer Featuring Orderly Conjugated Ethylenedioxythiophene and Dithienosilole Blocks

In view of the limited ruthenium resource, metal-free organic dyes may play a prominent role in the coming large-scale application of cost-effective dye-sensitized solar cells, if their efficiency

Sensitizer molecular structure-device efficiency relationship in dye sensitized solar cells.

In the Dye Sensitized Solar Cell the dye sensitizer carries out the light harvesting function and is therefore crucial in determining overall cell efficiency and the latest work focusing on the design of dyes for efficient DSSCs is revised.