136159-84-7Relevant articles and documents
Degradation of cyanoacrylic acid-based organic sensitizers in dye-sensitized solar cells
Chen, Cheng,Yang, Xichuan,Cheng, Ming,Zhang, Fuguo,Sun, Licheng
, p. 1270 - 1275 (2013)
Organic dyes have become widely used in dye-sensitized solar cells (DSSCs) because of their good performance, flexible structural modifications, and low costs. To increase the photostability of organic dye-based DSSCs, we conducted a full study on the degradation mechanism of cyanoacrylic acid-based organic sensitizers in DSSCs. The results showed that with the synergy between water and UV light, the sensitizer could desorb from the TiO2 surface and the cyanoacrylic acid unit of the sensitizer was transformed into the aldehyde group. It was also observed that the water content had a great effect on the degradation process. Our experiments conducted using 18O-labeled water demonstrated that the oxygen atom of the aldehyde group identified in the degraded dye came from the solvent water in the DSSCs. Therefore, controlling the water content during DSSC fabrication, good sealing of cells, and filtering the UV light are crucial to produce DSSCs that are more durable and robust. Dye-ing to degrade: The degradation mechanism of cyanoacrylic acid-based organic sensitizers in dye-sensitized solar cells (DSSCs) has been studied. With the synergy of water and UV light, the sensitizer desorbs from the TiO2 surface and the cyanoacrylic acid unit of sensitizer is converted into an aldehyde group. It is also observed that the oxygen atom of the aldehyde comes from the solvent water in DSSCs. Copyright
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.
