Tuning the HOMO and LUMO Energy Levels of Organic Chromophores for Dye Sensitized Solar Cells

Hagberg, Daniel P.; Marinado, Tannia; Karlsson, Karl Martin; Nonomura, Kazuteru; Qin, Peng; Boschloo, Gerrit; Brinck, Tore; Hagfeldt, Anders; Sun, Licheng

doi:10.1021/jo701592x

Cited by 594 publications

(455 citation statements)

References 26 publications

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“…Tuning the HOMO and LUMO energy levels of organic dyes for DSSCs is a good method for improving the performance of DSSCs [17]. Tian et al [10,18] reported that the excited-state oxidation potentials of TH301 and TH305 are À1.17 and À1.28 V, respectively.…”

Section: Resultsmentioning

confidence: 99%

Photo-induced intramolecular charge transfer from antenna to anchor groups in phenoxazine dyes

Yang

Liu

Zhou

et al. 2011

Chemical Physics Letters

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Section: Resultsmentioning

confidence: 99%

Photo-induced intramolecular charge transfer from antenna to anchor groups in phenoxazine dyes

Yang

Liu

Zhou

et al. 2011

Chemical Physics Letters

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“…Among the donor moieties, N, N-dimethylaniline group, 9,10 coumarins, [11][12][13][14][15][16][17] tetrahydroquinolines, 18,19 pyrrolidine, 20 carbazoles, 21 diphenylamine, 22 triphenylamine, [23][24][25][26] etc have been widely used for the dye synthesis. A linker moiety is a spacer added between the donor and acceptor moieties.…”

Section: Introductionmentioning

confidence: 99%

A TD-DFT study of the effects of structural variations on the photochemistry of polyenedyes

et al. 2012

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We report a TD-DFT study of three polyene dyes namely: NKX-2553, NKX-2554 and NKX-2569 in isolation as well as upon their adsorption on TiO 2 nanoparticles. By choosing closely related dyes we wish to focus on the effects of structural variations on the absorption and charge-transfer properties of these systems. These three dyes show a non-intuitive trend in their respective efficiencies and therefore, were chosen to shed light on the structural components that contribute to this behaviour. Although, NKX-2554 has an additional donor group, it is less efficient compared to the simpler NKX-2553 dye that contains only one donor group. When NKX-2554 structure is slightly modified by lengthening the linker-group, one obtains the most efficient dye among this set, namely, NKX-2569. In this work, we show that the changes in the donor moiety has very little or no effect on the efficiency of these dyes as can be seen in the case of NKX-2553 and NKX-2554. On the other hand, the improved performance of NKX-2569-titania complex can be understood to be a result of the longer linker group. A better understanding of these properties within different dye-titania complexes is important for the continual improvement of DSSCs. In this regards, this study will serve to provide guidelines to improve efficiencies of novel organic dyes.

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“…Therefore, 7 was treated with nBuLi, followed by addition of anhydrous DMF, to give trialdehyde 8 in 86 % yield. [20] Scheme 2 illustrates the synthetic approach to G0-4-2. The key component, the "masked" AB 2 building block 10, bears one unprotected thiophene group for further modification and two thiophene groups with hexyl chains.…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

Solution‐Processed Bulk Heterojunction Photovoltaic Cells from Gradient π‐Conjugated Thienylene Vinylene Dendrimers

Wang

Zhong

Tang

et al. 2009

Chemistry An Asian Journal

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A series of gradient π‐conjugated dendrimers and their corresponding models based on 5,5,10,10,15,15‐hexahexyltruxene moieties as nodes and oligo(thienylene vinylene) (OTVs) units with different lengths as branching arms are synthesized in good yields through Wittig–Horner reactions. All new compounds are fully characterized by 1H and 13C NMR spectroscopy, elemental analysis, and MALDI‐TOF MS or ESI‐MS. Investigation of their photophysical properties reveals that the gradient dendritic scaffold not only results in a higher molar absorption coefficient and broader absorption region than those of their corresponding model compounds, but also improves the PL quantum yields relative to the corresponding OTVs. The suitable HOMO and LUMO levels as well as excellent film forming properties make these molecules potential candidates for organic solar cells. Solution‐processed bulk heterojunction solar cells using these dendrimers as donor and [6,6]‐phenyl‐C61 butyric acid methyl ester as acceptor are prepared and tested. The power conversion efficiency of the devices based on G0-4-2 is 0.40 % under illumination of air mass 1.5 and 100 mW cm−2. This is the highest record value for OTV‐based materials to date. Although the absorption band of dendrimer G0-4-2 is much narrower than that of poly(3‐hexylthienylene vinylene) (P3HTV), the efficiency of its solar cell device is almost twice that of the device based on P3HTV. This result shows clearly the advantage of gradient dendritic structures as active materials for photovoltaic cells.

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Tuning the HOMO and LUMO Energy Levels of Organic Chromophores for Dye Sensitized Solar Cells

Cited by 594 publications

References 26 publications

Photo-induced intramolecular charge transfer from antenna to anchor groups in phenoxazine dyes

Photo-induced intramolecular charge transfer from antenna to anchor groups in phenoxazine dyes

A TD-DFT study of the effects of structural variations on the photochemistry of polyenedyes

Solution‐Processed Bulk Heterojunction Photovoltaic Cells from Gradient π‐Conjugated Thienylene Vinylene Dendrimers

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