Author/Authors :
Adineh, Maryam Department of Chemistry - Shahid Beheshti University, Tehran, Iran , Tahay, Pooya Department of Chemistry - Shahid Beheshti University, Tehran, Iran , Shahrjerdi, Akram Department of Chemistry - Shahid Beheshti University, Tehran, Iran , Hoseini Davarani, Saeed Department of Chemistry - Shahid Beheshti University, Tehran, Iran , Safari, Nasser Department of Chemistry - Shahid Beheshti University, Tehran, Iran
Abstract :
The applications of electrochemically functionalized porphyrin have been considered in dye-sensitized solar cells (DSSCs). A porphyrin-catechol derivative has been electrochemically functionalized with a sulfur-contained, 2-mercaptobenzothiazole moiety and was tested as dye. Catechol moiety acts as the anchoring group in these types of dyes. The IPCE result confirmed that photocurrents for DSSCs based on porphyrin-catechol dyes are mainly generated by an indirect electron injection pathway (Type I mechanism).The cells made with this porphyrin were stable and showed no significant desorption of dye from the TiO2 surface after days. Electrochemically functionalized porphyrin-catechol showed almost 100 % enhancement in efficiency compared to bare porphyrin-catechol. The effect of different additives on cell performance was also tested. Electrochemically functionalized porphyrin catechol, in the presence of chenodeoxycholic acid had a record performance with a conversion efficiency of 0.6 % under AM 1.5 irradiation.
Keywords :
Dye-sensitized solar cells , Porphyrin-catechol , Electrochemically functionalized porphyrin , Indirect electron injection pathway
