1380313-55-2Relevant academic research and scientific papers
New D-A-π-A organic sensitizers for efficient dye-sensitized solar cells
Li, Xiangguang,Zheng, Zhiwei,Jiang, Wei,Wu, Wenjun,Wang, Zhaohui,Tian, He
supporting information, p. 3590 - 3592 (2015/04/13)
Four novel metal-free D-A-π-A organic sensitizers (ND01-ND04) based on N-annulated perylene (NP) derivatives as efficient electron donors for dye-sensitized solar cells (DSSCs) are designed. Among them, ND02 featuring bulky 4-methoxyphenyl as the additional electron-donating substituents on the NP unit shows a power conversion efficiency as high as 8.30%. This journal is
Diketopyrrolopyrrole-porphyrin conjugates as broadly absorbing sensitizers for dye-sensitized solar cells
Warnan, Julien,Favereau, Ludovic,Meslin, Frédéric,Severac, Marjorie,Blart, Errol,Pellegrin, Yann,Jacquemin, Denis,Odobel, Fabrice
scheme or table, p. 1568 - 1577 (2012/10/07)
A series of four new push-pull zinc porphyrin-based dyes was synthesised for hybrid photovoltaic solar cells with a view to enhancing the light-harvesting efficiency at approximately 550 nm with a diketopyrrolopyrrole (DPP) unit. The strength of the donor side of the push-pull porphyrin was tuned by affixing the electron-rich 4,4'-dimethoxydiphenylamine group at the meso position of the macrocycle, and the influence of the distance between the semiconductor surface and the porphyrin chromophore was assessed by introducing different π-conjugated spacers. Charge-transfer transitions over great distances were characterised by electronic absorption spectroscopy and DFT calculations. The absorption and photoactivity spectra of the new bichromophoric dyes spans the whole visible spectrum to the red, implying a better light-harvesting efficiency than regular porphyrin as the absorption spectra of DPP and porphyrin complement one another. Photovoltaic conversion efficiencies accordingly increase from 2.40 to 5.19%. Interestingly, the best overall efficiency was reached with dye 3, which lacks the powerful donating group in the meso position of the porphyrin core. Optical and electrochemical measurements coupled to time dependent (TD)-DFT calculations give insight into the deleterious effect of the 4,4'-dimethoxydiphenylamine unit on the photovoltaic performances, paving the way towards the design of efficient push-pull porphyrin-based sensitizers. Copyright
A compact diketopyrrolopyrrole dye as efficient sensitizer in titanium dioxide dye-sensitized solar cells
Warnan, Julien,Favereau, Ludovic,Pellegrin, Yann,Blart, Errol,Jacquemin, Denis,Odobel, Fabrice
, p. 9 - 15 (2012/04/10)
Two novel TiO2 sensitizers, based on the highly stable diketopyrrolopyrrole (DPP) skeleton, have been synthesized for application in the field of dye sensitized solar cells. The obtained dyes, DPP1 and DPP2 bear respectively a cyanoacrylic acid and a rhodanine acid anchoring groups, thus tuning the extent of the electronic communication with the semi-conducting oxide. The two chromophores were characterized by solution phase spectroscopy and electrochemistry. DFT calculations gave deeper insight into the electronic structure of both dyes, through the disclosure of their frontier orbitals. Photovoltaic performances unravelled the undisputable advantage of DPP1 over DPP2, owing to the combination of a favourable dipolar moment interaction with TiO2, and more intimate orbital blending between the chemisorbed dye and the conduction band. Chenodeoxycholic acid proved to be useful in limiting the formation of dye aggregates, improving to a great extent the performances of DPP1 based DSSCs, reaching in our conditions a 4.47% yield and 57% IPCE at 500 nm.
