Imaging Techniques for the Study of Photodegradation of Dye Sensitization Cells*

Turrión, María Belén; Macht, B.; Salvador, P.; Tributsch, H.

doi:10.1524/zpch.1999.212.part_1.051

Cited by 22 publications

(28 citation statements)

References 7 publications

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“…12 Images of photocurrent and photovoltage showed obvious degradation of dye within 24 h after the preparation of DSSCs. 52 It is clear that further improvements in DSSC efficiency and stability are still needed to realize commercial applications in the future. Here we describe DSSCs composed of PAs with N719 dye covalently attached by silanization of TiO 2 with aminopropyltriethoxysilane (APTES) and then attachment of dye through a covalent amide bond between the COOH/ COO − groups of the dye and the NH 2 group of APTES.…”

Section: ■ Introductionmentioning

confidence: 99%

Covalent Modification of Photoanodes for Stable Dye-Sensitized Solar Cells

Luitel

2013

Langmuir

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This paper describes the surface modification of TiO 2 with 3-aminopropyltriethoxysilane (APTES) followed by covalent attachment of Ru-based N719 dye molecules to TiO 2 through an amide linkage for use as photoanodes (PAs) in dyesensitized solar cells (DSSCs). Attenuated total reflectance− Fourier transform infrared spectroscopy (ATR-FTIR) confirms the surface chemistry between the TiO 2 and dye. The photovoltaic efficiency of DSSCs with covalently linked dye is very similar (6−7%) to that of traditionally prepared DSSCs prepared by direct immersion when both have similar dye coverage. Importantly, the efficiency of PAs with covalently linked dye did not change after storage for more than 60 days in air, whereas the traditionally prepared PAs decreased dramatically after 1 day and lost most of their efficiency after a week. FTIR and UV−vis characterization of the dye suggests that covalent linkage improves stability by preventing the loss of the thiocyanato ligands and/or tetrabutylammonium cations on the dye. PAs with covalently linked dye are also more stable toward water, acid, heat, and UV light compared to traditionally prepared PAs and are more stable compared to other modified PAs with dye attached through electrostatic or hydrogen-bonding interactions.

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Section: ■ Introductionmentioning

confidence: 99%

Covalent Modification of Photoanodes for Stable Dye-Sensitized Solar Cells

Luitel

2013

Langmuir

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“…Weak photocurrent degradation, without a significant change in the pattern of photocurrent gen- ) the photocurrent degraded within 72 h by more than 90%. The observed degradation is much faster than that of electrochemical dye-sensitized cells [34]. The dye cisdithiocyanate-bis(2,2′-bipyridyl-4-4′-dicarboxylate) ruthenium (II) exhibits an extended stability for several months to years under comparable conditions in wet type solar cells.…”

Section: Absorption Enhancement Of Visible Lightmentioning

confidence: 96%

Progress in dye‐sensitized solid state solar cells

Sirimanne

Perera

2008

Physica Status Solidi (b)

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Recently, dye sensitized solid‐state solar cells with the configuration of n‐semiconductor | sensitizer | hole‐conductor (NDP) have been demonstrated. The maximum power conversion efficiency of this type of solar cells reaches only one third compared to that of dye sensitized photo‐electrochemical cells. The properties of different types of solid‐state dye‐sensitized solar cells are discussed with the aim to understand the mechanisms of operation of these devices. Here we present an overview and the current state of NDP type solar cells based on copper iodide (or copper thiocyanate) as a hole‐conductor. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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“…In the present work, the influence of physical and chemical parameters on photocurrent and the stability of TiO 2 jdyejCuI solar cells is visualized by space resolved photocurrent-imaging techniques [10,11] that provide a broad range of information by giving amplitude or/and patterns of photocurrent, photovoltage and fill-factor down to microscopic dimensions and additionally permit combinatorial approaches.…”

Section: Introductionmentioning

confidence: 99%