302965-24-8Relevant academic research and scientific papers
Enhanced electro-optic activity from the triarylaminophenyl-based chromophores by introducing heteroatoms to the donor
Yang, Yuhui,Liu, Fenggang,Wang, Haoran,Bo, Shuhui,Liu, Jialei,Qiu, Ling,Zhen, Zhen,Liu, Xinhou
, p. 5297 - 5306 (2015/05/27)
A series of chromophores T1-T3 based on the same thiophene π-conjugation and tricyanofuran acceptor (TCF) but with different heteroatoms in the triarylaminophenyl (TAA) donors have been synthesized and systematically investigated in this study. Density functional theory (DFT) was used to calculate the HOMO-LUMO energy gaps and first-order hyperpolarizability (β) of these chromophores. Moreover, to determine the redox properties of these chromophores, cyclic voltammetry (CV) experiments were performed. After introducing the heteroatom to the benzene ring of the TAA donor, reduced energy gaps of 1.28 and 0.84 eV were obtained for chromophores T2 and T3, respectively, which was much lower than for chromophore T1 (ΔE = 1.46 eV). These chromophores showed excellent thermal stability with their decomposition temperatures all above 280 °C. Compared with results obtained from the chromophore without the heteroatom (T1), these new chromophores show better intramolecular charge-transfer (ICT) absorption. Most importantly, the high molecular hyperpolarizability (β) of these chromophores can be effectively translated into large electro-optic (EO) coefficients (r33) in the poled polymers. The electro-optic coefficient of poled films containing 25 wt% of these new chromophores doped in amorphous polycarbonate (APC) afforded values of 16, 58 and 95 pm V-1 at 1310 nm for chromophores T1-T3, respectively. High r33 values indicated that introducing heteroatom to the benzene ring of the TAA donor can efficiently improve the electron-donating ability, which improves the hyperpolarizability (β). The long-chain on the benzene ring of the TAA donor, acting as the isolation group, may reduce intermolecular electrostatic interactions, thus enhancing the macroscopic EO activity. These properties, together with the good solubility, suggest the potential use of these new chromophores as advanced material devices. This journal is
Rationalization of dye uptake on titania slides for dye-sensitized solar cells by a combined chemometric and structural approach
Gianotti, Valentina,Favaro, Giada,Bonandini, Luca,Palin, Luca,Croce, Gianluca,Boccaleri, Enrico,Artuso, Emma,Van Beek, Wouter,Barolo, Claudia,Milanesio, Marco
, p. 3039 - 3052 (2015/09/28)
A model photosensitizer (D5) for application in dye-sensitized solar cells has been studied by a combination of XRD, theoretical calculations, and spectroscopic/chemometric methods. The conformational stability and flexibility of D5 and molecular interactions between adjacent molecules were characterized to obtain the driving forces that govern D5 uptake and grafting and to infer the most likely arrangement of the molecules on the surface of TiO2. A spectroscopic/chemometric approach was then used to yield information about the correlations between three variables that govern the uptake itself: D5 concentration, dispersant (chenodeoxycholic acid; CDCA) concentration, and contact time. The obtained regression model shows that large uptakes can be obtained at high D5 concentrations in the presence of CDCA with a long contact time, or in absence of CDCA if the contact time is short, which suggests how dye uptake and photovoltaic device preparation can be optimized.
Assessment of new gem-silanediols as suitable sensitizers for dye-sensitized solar cells
Barozzino Consiglio, Gabriella,Pedna, Fabio,Fornaciari, Cosimo,Fabrizi De Biani, Fabrizia,Marotta, Gabriele,Salvatori, Paolo,Basosi, Riccardo,De Angelis, Filippo,Mordini, Alessandro,Parisi, Maria Laura,Peruzzini, Maurizio,Reginato, Gianna,Taddei, Maurizio,Zani, Lorenzo
, p. 198 - 206 (2013/02/25)
Four novel gem-silanediol-containing organic dyes featuring a highly conjugated backbone have been synthesized in order to investigate their potential as active materials for photovoltaics. After spectroscopic characterization, the compounds showing the b
NANOENGINEERED ORGANIC NONLINEAR OPTICAL GLASSES
-
Page/Page column 10-11; sheet 12, (2009/05/28)
Nonlinear optically active compounds having film-forming properties, films including the compounds, methods for making the compounds and films, and electro-optic devices including the films and compounds.
