How do dye Sensitised solar cells work?

Sunlight passes through the transparent electrode into the dye layer where it can excite electrons that then flow into the conduction band of the n-type semiconductor, typically titanium dioxide. The electrons from titanium dioxide then flow toward the transparent electrode where they are collected for powering a load.

What dye is used in dye-sensitized solar cells?

Two natural dyes, carminic acid and santalin, were selected as potential sensitizers for dye-sensitized solar cells. The power conversion efficiency of natural dyes, about 0.5%, was poor compared to that of LEG4 under identical conditions (5.6%), due to both lower open circuit potentials and photocurrent densities.

How do you make dye-sensitized solar cells?

Materials – ITO(Indium doped Tin Oxide) glass (2 x 2 cm, 2 slides for 1 cell) – Dye (Eosin Y, Eosin B, etc.) – Ethanol – TiO2 paste ➢ Suspend 3.5g of TiO2 nano-powder P25 in 15ml of ethanol. ➢ Sonicate it at least for 30 min. ➢ Add 0.5ml of titanium(IV) tetraisopropoxide into the suspension.

Why dye-sensitized solar cells is important?

Introduction. Dye-sensitized solar cells (DSSCs) have arisen as a technically and economically credible alternative to the p-n junction photovoltaic devices. In the late 1960s, it was discovered that electricity can be generated through illuminated organic dyes in electrochemical cells.

Can dye-sensitized solar cells generate electricity in the dark?

Dye-sensitized solar cells that can generate electricity in the daytime and dark are fabricated by combining long persistence phosphors with mesoscopic TiO2 photoanodes.

What is the function of nanocrystalline TiO2 in a solar cell?

Background: This dye-sensitized solar cell, also known as a Grätzel cell, uses a thin film of titanium dioxide which has been ground to a fine powder (nanocrystalline) to increase its reactive surface area.

Is titanium dioxide used in solar panels?

The semiconductor of choice for making dye-sensitized solar cells (DSSCs) due to its good properties is titanium dioxide, TiO2, also known as titania.