Work

Charge Separation and Efficient Light Energy Conversion in Sensitized Mesoscopic Solar Cells Based on Binary Ionic Liquids

Year: 2005

Type: article

Abstract: A 7.4% power conversion efficiency at air mass (AM) 1.5 full sunlight was reached with a mesoscopic solar cell employing a new binary ionic liquid electrolyte composed of 1-propyl-3-methylimidazolium iodide and 1-ethyl-3-methylimidazolium tricyanomethanide in conjunction with the amphiphilic ruthenium complex NaRu(4-carboxylic acid-4'-carboxylate)(4,4'-dinonyl-2,2'-bipyridine)(NCS)(2), coded as Z-907Na. Ultramicroelectrode voltammetric, nanosecond laser transient absorbance, and photovoltaic measurements show that a high iodide concentration is required for dye regeneration to compete efficiently with charge recombination. A surprisingly fast reductive quenching process is turned on in pure iodide melts. This channel is unproductive, explaining the lower photocurrents observed under these conditions.

Source: Journal of the American Chemical Society

DOI: 10.1021/ja042232u

Authors: Peng Wang, Bernard Wenger, Robin Humphry-Baker, Jacques-E. Moser, Joël Teuscher, Willi Kantlehner, Jochen Mezger, Edmont V. Stoyanov, Shaik M. Zakeeruddin, Michael Grätzel

Institution: École Polytechnique Fédérale de Lausanne

Language: English

Topic: TiO2 Photocatalysis and Solar Cells

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: green

OpenAlex ID: W2028344502

FWCI: 20.81

Cites: 85

Cited by: 391

Related to: 9