+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Cobalt(II/III) redox electrolyte in ZnO nanowire-based dye-sensitized solar cells

Cobalt(II/III) redox electrolyte in ZnO nanowire-based dye-sensitized solar cells

Acs Applied Materials and Interfaces 5(6): 1902-1906

In this work, we explore the use of cobalt complex redox shuttles in dye sensitized solar cells (DSCs) based on ZnO nanowires (NWs). Arrays of vertically aligned ZnO NWs produced by a low-cost hydrothermal method are used to fabricate DSCs with [Co(bpy)3](2+/3+) as electrolyte. A direct comparison of the performance of [Co(bpy)3](2+/3+)-based ZnO DSC with I(-)/I3(-)-based ones demonstrates the higher suitability of the cobalt complex, both in terms of a larger open circuit voltage (VOC) and a higher photocurrent. The [Co(bpy)3](2+/3+) electrolyte results in VOC enhancements above 200 mV. This VOC increase is associated to the better match between the cobalt complex redox potential and the oxidation potential of the dye. The incident photon-to-current efficiency (IPCE) enhancement is attributed to a less competitive visible light absorption of the cobalt redox couple. Thus the present study opens new opportunities to improve energy conversion efficiency in ZnO-based DSCs.

Please choose payment method:

(PDF emailed within 0-6 h: $19.90)

Accession: 052152681

Download citation: RISBibTeXText

PMID: 23448266

DOI: 10.1021/am400042s

Related references

Enhanced photovoltaic performance of nanowire dye-sensitized solar cells based on coaxial TiO2@TiO heterostructures with a cobalt(II/III) redox electrolyte. Acs Applied Materials and Interfaces 5(20): 9872-9877, 2014

A quasi-liquid polymer-based cobalt redox mediator electrolyte for dye-sensitized solar cells. Physical Chemistry Chemical Physics 15(40): 17419-17425, 2013

Porphyrin-sensitized solar cells with cobalt (II/III)-based redox electrolyte exceed 12 percent efficiency. Science 334(6056): 629-634, 2011

Transparent Conductive Oxide-Less Dye-Sensitized Solar Cells Consisting of Dye-Cocktail and Cobalt Based Redox Electrolyte. Journal of Nanoscience and Nanotechnology 17(7): 4748-4754, 2017

Effects of TiO2 and TiC Nanofillers on the Performance of Dye Sensitized Solar Cells Based on the Polymer Gel Electrolyte of a Cobalt Redox System. Acs Applied Materials and Interfaces 8(37): 24559-24566, 2016

Iron pyrite thin film counter electrodes for dye-sensitized solar cells: high efficiency for iodine and cobalt redox electrolyte cells. Acs Nano 8(10): 10597-10605, 2014

The effect of dye coverage on the performance of dye-sensitized solar cells with a cobalt-based electrolyte. Physical Chemistry Chemical Physics 16(18): 8503-8508, 2014

Stable high efficiency dye-sensitized solar cells based on a cobalt polymer gel electrolyte. Chemical Communications 49(79): 8997-8999, 2013

Dye-sensitized solar cells based on N719 and cobalt gel electrolyte obtained through a room temperature process. Journal of Photochemistry and Photobiology A: Chemistry 330: 8-14, 2016

Long-term stability for cobalt-based dye-sensitized solar cells obtained by electrolyte optimization. Chemical Communications 50(47): 6249-6251, 2014

The Effect of the Scattering Layer in Dye-Sensitized Solar Cells Employing a Cobalt-Based Aqueous Gel Electrolyte. Chemsuschem 8(21): 3704-3711, 2016

Reducing mass-transport limitations in cobalt-electrolyte-based dye-sensitized solar cells by photoanode modification. Chemphyschem 15(6): 1216-1221, 2014

Eosin Yellowish Dye-Sensitized ZnO Nanostructure-Based Solar Cells Employing Solid PEO Redox Couple Electrolyte. International Journal of Photoenergy 2012: 1-8, 2012

High-Performance Porphyrin-Based Dye-Sensitized Solar Cells with Iodine and Cobalt Redox Shuttles. Chemsuschem 10(5): 938-945, 2016

Thiocyanate-free ruthenium(II) sensitizers for dye-sensitized solar cells based on the cobalt redox couple. Chemsuschem 7(10): 2930-2938, 2015