Nickel oxide nanostructured electrodes towards perylenediimide-based dye-sensitized solar cells

Feihl, Sebastian; Costa, Rubén D.; Pflock, Stephan; Schmidt, Cordula D.; Schönamsgruber, Jörg; Backes, Susanne; Hirsch, Andreas; Guldi, Dirk M.

doi:10.1039/c2ra22206j

Cited by 23 publications

(16 citation statements)

References 64 publications

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“…Finally a conclusive proof of our concept is borrowed from DSSCs employing NiO electrodes, which is an p‐type semiconductor and, in turn, acts as an electron donor material rather than an electron acceptor material 25. In stark contrast to what was observed in ZnO DSSCs, NiO DSSCs prepared with TPrPc‐OH outperform those in which NG/TPrPc‐OH is integrated.…”

Section: Methodsmentioning

confidence: 93%

Electron Accepting Porphycenes on Graphene

et al. 2013

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Section: Methodsmentioning

confidence: 93%

Electron Accepting Porphycenes on Graphene

et al. 2013

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“…The obtained solution was stirred until a transparent green precursor was obtained. After 3 days of resting at 30 °C the solution was centrifuged to remove any remaining crystallites before being used for doctor blading . For the preparation of the TiO 2 electrodes for the application in t‐DSSCs the standard paste from Solaronix (Ti‐Nanoxide T/SP), which was diluted with ethanol to obtain thinner films, was used.…”

Section: Methodsmentioning

confidence: 99%

“…After 3days of resting at 30 8Ct he solution was centrifuged to remove any remaining crystallites before being used for doctor blading. [50][51][52] For the preparation of the TiO 2 electrodes for the application in t-DSSCs the standard paste from Solaronix (Ti-Nanoxide T/SP), which was diluted with ethanol to obtain thinner films, was used. As substrates for the NiO and TiO 2 electrodes fluoride doped tin oxide glass slides (FTO, 8 W/square, Pilkington, XOP Glass) were used, which were washed by ultrasonication in solutions of acetone, tenside solution (Deconex OP 163), water,a nd isopropanol for 15 min each.…”

Section: Preparation and Characterization Of P-type Dsscs And T-dsscsmentioning

confidence: 99%

Designing Squaraines to Control Charge Injection and Recombination Processes in NiO‐based Dye‐Sensitized Solar Cells

et al. 2017

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Herein, the synthesis of a new family of squaraines (SQs) and their application in p-type dye-sensitized solar cells (DSSCs) is presented. In particular, two sets of SQs were designed featuring either two or four anchoring carboxylic groups combined with either oxygen or dicyanovinyl central groups. The SQs were characterized by using a joint theoretical, photophysical, and electrochemical approach. Importantly, the presence of different central groups forces a frozen cis (dicyanovinyl group) or a trans (oxygen group) SQ conformation. Based on the latter, the current work enables a direct comparison between cis and trans isomers as well as the impact of a different number of anchors. Considering their electron-accepting and light-harvesting character, they were tested in NiO-based DSSCs. Photocurrent-voltage, incident photon-to-current conversion efficiency (IPCE), and electrochemical impedance spectroscopy measurements were performed. By virtue of their different symmetry, stereochemistry, and number of carboxylic groups, altered adsorption behavior onto NiO electrodes as well as diverse charge injection and charge recombination dynamics were noted under operation conditions. SQs with four linkers in a frozen cis isomerism show the best charge collection properties among the investigated SQs, providing a valuable guideline for the molecular design of future SQs for p-type DSSCs. In addition, we assembled tandem DSSCs featuring SQ/NiO photocathodes and N719/TiO photoanodes. The IPCE of the resulting tandem DSSCs implies light harvesting throughout most of the visible part of the solar spectrum owing to the complementary absorption features of SQ and N719.

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“…[9][10][11][12] Semiconductor nickel oxide (NiO) stands out as an electrode material for p-type DSSCs. 7,[13][14][15] This has triggered the design of novel light-harvesting and electron-accepting chromophores. 13 We have focused on porphycenes because of their similarity to porphyrins and phthalocyanines.…”

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confidence: 99%

“…The systems calculated consisted of P1 and P2 linked to an Ni 14 O 13 2+ cluster. The molecular structures of P1 and P2 and the linker/NiO hybrid were optimized, and then joined for the PECI calculations.…”

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confidence: 99%

Integrating metalloporphycenes into p-type NiO-based dye-sensitized solar cells

Feihl

Costa

Brenner³

et al. 2014

Chem. Commun.

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In the current work, we have explored a novel synthetic route towards metalated porphycenes and their use in p-type NiO-based dye-sensitized solar cells. Particular emphasis is placed on the influence that the relative positioning of the anchoring group exerts on the DSSC performance.Factors that favor dye-sensitized solar cells (DSSCs) as a key technology in solar-energy conversion schemes include low purity requirements and easy accessibility, low costs, fast processing, and simple up-scaling. DSSCs have been rendered even more attractive by recent progress in solid-state and flexible devices. 1,2 To date, record efficiencies as high as 13% have been reported for n-type DSSCs. 3 However, efficient p-type DSSCs, which complement n-type DSSCs in, for example, tandem configurations, are necessary for obtaining values beyond 13%, and are therefore the subject of intensive investigation. 4 Regardless of whether the semiconductor materials are n-or p-type, the chromophore attached to the semiconductor electrode is decisive in terms of light harvesting, charge transfer, and charge transport. Diverse organic or inorganic chromophores have recently been tested in both types of DSSCs. [5][6][7][8] Fine tuning synthetic parameters such as the metalation of the chromophore, the nature of the anchor, and the bridge that links the chromophore to the anchor, have made control over important characteristics like highly effective charge separation, reduced charge recombination, and long term stability possible. [9][10][11][12] Semiconductor nickel oxide (NiO) stands out as an electrode material for p-type DSSCs. 7,[13][14][15] This has triggered the design of novel light-harvesting and electron-accepting chromophores. 13 We have focused on porphycenes because of their similarity to porphyrins and phthalocyanines. 16,17 In contrast to the electrondonating features of porphyrins and phthalocyanines, which are widely used in n-type DSSCs, 8,18 porphycenes are strong electron acceptors, making them more suitable building blocks for p-type DSSCs. Only a few examples of the use of free-base porphycenes in solar energy devices are known to date. 19,20 We now report two major achievements. The first is the development of a new synthetic route to nickel porphycenes, which have barely been investigated previously. We have characterized the novel nickel porphycenes by physicochemical and computational techniques. Secondly, we have used these nickel porphycenes in p-type NiO-based DSSCs. We have been able to rationalize the overall performances in terms of the position and the nature of the anchor groups and, in turn, to establish new guidelines to designing novel electron acceptors.Three different nickel porphycenes were prepared -Scheme 1 -see ESI. † To obtain the target porphycenes, the 2,7,12,17-tetra-npropylporphycenato nickel (1) was chosen as starting material. Firstly, the peripheral alkyl chains ensure solubility in a wide variety of solvents. Secondly, the established chemistry of 1 allows the target featuring a vinyl group as a...

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Nickel oxide nanostructured electrodes towards perylenediimide-based dye-sensitized solar cells

Cited by 23 publications

References 64 publications

Electron Accepting Porphycenes on Graphene

Electron Accepting Porphycenes on Graphene

Designing Squaraines to Control Charge Injection and Recombination Processes in NiO‐based Dye‐Sensitized Solar Cells

Integrating metalloporphycenes into p-type NiO-based dye-sensitized solar cells

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