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Dipicolinic acid: a strong anchoring group with tunable redox and spectral behavior for stable dye-sensitized solar cells

DOI: 10.1039/C4CC06432A DOI Help

Authors: Erik Gabrielsson (KTH Royal Institute of Technology) , Haining Tian (KTH Royal Institute of Technology) , Susanna K. Eriksson (Uppsala University) , Jiajia Gao (KTH Royal Institute of Technology) , Hong Chen (Stockholm University) , Fusheng Li (KTH Royal Institute of Technology) , Johan Oscarsson (Uppsala University) , Junliang Sun (Stockholm University) , HÃ¥kan Rensmo (Uppsala University) , Lars Kloo (KTH Royal Institute of Technology) , Anders Hagfeldt (Uppsala University) , Licheng Sun (KTH Royal Institute of Technology)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chem. Commun. , VOL 51 , PAGES 3858 - 3861

State: Published (Approved)
Published: January 2015
Diamond Proposal Number(s): 10379

Abstract: Dipicolinic acid was investigated as a new anchoring group for DSSCs. A pilot dye (PD2) bearing this new anchoring group was found to adsorb significantly stronger to TiO2 than its cyanoacrylic acid analogue. The electrolyte composition was found to have a strong effect on the photoelectrochemical properties of the adsorbed dye in the device, allowing the dye LUMO energy to be tuned by 0.5 eV. Using a pyridine-free electrolyte, panchromatic absorption of the dye on TiO2 extending to 900 nm has been achieved. Solar cells using PD2 and a Co(bpy)3 based electrolyte showed unique stability under simulated sunlight and elevated temperatures.

Subject Areas: Chemistry

Instruments: I19-Small Molecule Single Crystal Diffraction

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