Natural dye extract of lawsonia inermis seed as photo sensitizer for titanium dioxide based dye sensitized solar cells

Stability and efficiency of dye-sensitized solar cells based on papaya-leaf dye

“…Regarding the efficiency of the examined natural dye-based DSSCs, the present comparison study determined that the PL-based dye with pH 3.5 produced the most efficient solar cells (0.28%). The measured efficiencies (0.07-0.28%) are lower than several values reported in the literature: 0.09-1.47% with 20 natural dyes [13], 0.03-1.17% with Pomegranate leaves and Mulberry fruit dyes [1], 0.81% with zinc chlorophyll dyes [14], 0.88% with chlorophyllins dyes [15], 0.54-0.97% with Kerria japonica and Rosa chinensis flower dyes [4], and 1.47% with Lawsonia inermis seed dyes [16]. These differences could be influenced by factors like the type and shape of semiconductor, the electrical resistance property of the solar cells, and the molecular structure of the dyes.…”

Fe–tannic acid complex dye as photo sensitizer for different morphological ZnO based DSSCs

“…The natural dyes are promising alternative to organic dyes for DSSC application [15]. Natural dyes include several pigments such as cyanin, carotenoids, tannins, chlophyll, anthocyanins, betanins [2,5,14]. They are environmental friendly, cheap and have easy preparation methods.…”

“…Tannins are watersoluble compounds and their modified forms are used as adsorbent for metals from wastewater [16][17][18]. Tannins are divided in four major groups: Gallotannins, ellagitannins, complex, and A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT 5 condensed tannins [16]. Tannic acid is a specific commercial form of gallotannin which are esters of glucose and gallic acid.…”

A novel dual mechanism in dye-sensitized solar cells

“…Particularly, in some cases, sugar appears in high concentrations and has a negative effect on the electric conduction . Fortunately, some vegetable and seeds (grains) contain pigments in the appropriated concentration as to be used in the DSSC fabrication, with the additional advantage of their low content of sugars, thus representing an additional attractive technological advantage for it reduces the cost for the DSSC fabrication .…”