Role of Dyestuff in Improving Dye-Sensitized Solar Cell Performance

Abstract

-Dye-sensitized solar cells DSSCs have attracted great attention for their simple fabrication process, low production costs, relatively high conversion efficiency, and being environmental friendly.DSSC are a combination of materials, consisting of a transparent electrode coated with a dye-sensitized mesoporous film of nanocrystalline particles of TiO2, an electrolyte containing a suitable redox-couple and a electrode.DSSCs use organic dye assist to produce electricity in a wide range of light conditions, indoors and outdoors. The dye in the solar cell is the key element since it is responsible for light harvesting ability, photoelectron generation (the creation of free charges after injection of electrons into the nanostructured semi-conducting oxide) and electron transfer.For this reason, this paper gives a background of dyestuff, types and limitations. The motivation of this work is to design a simple, easy and prepare an efficient organic dye sensitizer. Also, this paper investigates the important criteria which are considered for selecting dye to enhance DSSC efficiency.

Utilising N‐glutaryl chitosan‐based film with butterfly pea flower anthocyanin as a freshness indicator of chicken breast

“…The absorption at 570 nm and 618 nm resulted in yellow‐green and red colours absorbed, and violet to blue and green colours observed. The absorption at 400 nm indicates the absorption of violet colour, resulting in yellow colour observed 50 . The spectra results validated BPA's possible application as a dye in pH‐sensitive indicator films, as BPA displayed distinct colour changes at different pH levels.…”

“…The absorption at 400 nm indicates the absorption of violet colour, resulting in yellow colour observed. 50 The spectra results validated BPA's possible application as a dye in pH-sensitive indicator films, as BPA displayed distinct colour changes at different pH levels.…”

The effect of LEDs on Galdieria sulphuraria cultivation at indoor and outdoor condition.

“…Since the pigment of G. sulphuraria appears in blue green [21] the respective color absorbed by the algal pigment is red. This can be understood by a complementary color scheme [12] as shown in Table 2. This also explains why red light is more favored by G. sulphuraria compared to other lights.…”

“…Generally, chlorophyll and carotenoid absorb the greatest amount of light in the red and blue wavelength regions [11]. Besides sunlight, light emitting diodes (LED) can also be a great source of light; LEDs have already been shown to improve algae growth [12]. When compared fluorescent lights, LEDs are more cost effective due to its lowwattage irradiance, less heat energy, longer shell life, and higher conversion [13][14][15].…”