Due to their structure features, 10H-phenothiazine-based dyes show high photovoltaic performance and have great potential for future technical applications in dye-sensitized solar cells (DSSCs). The recent significant scientific progress of the dyes and their DSSCs is reviewed, and the relationship between the molecular structure and the photoelectric conversion properties is especially discussed.

Extensive attention has been concentrated toward the development of superhydrophobic coatings with unique structures and properties due to their extended applications in our daily life. However, the poor durability and...

Four novel D-p-A metal-free organic dyes DTP1-4 containing a dithienopyrrolobenzothiadiazole (DTPBT) unit were synthesized and applied in dye-sensitized solar cells, where DTPBT was employed as a p-spacer for the first time. The photophysical, electrochemical and photovoltaic properties of the dyes were systematically investigated. The dyes DTP1-4 showed broad absorption spectra and high molar extinction coefficient, resulting in high light harvesting efficiency. In addition, the impacts of donors and the thiophene unit as an additional p-spacer were also studied. The results showed that the dye DTP4 with triphenylamine as the donor exhibited better photovoltaic performance than DTP1-3 with phenothiazine as the donor. The linking position of the thiophene unit to the DTPBT unit significantly influenced the photovoltaic performance. A power conversion efficiency of 7.55% with 1 mM CDCA as the co-adsorbent under simulated AM 1.5 G illumination was reached by the DSSC sensitized by the dye DTP4. These results indicate that the DTPBT-based organic dye is a promising candidate for efficient DSSCs.

Advantages of the double branched dyes: better fixing, higher loading density, lower aggregation tendency, longer S1 lifetime on the TiO2 surface