Dye-Sensitized Solar Cell (Grätzel Cell)

Dye + hν → Dye* → Dye⁺ + e⁻ (into TiO₂)

Visão geral

In a Grätzel cell, a ruthenium dye absorbs sunlight and injects an electron into the conduction band of nanocrystalline TiO₂. An iodide/triiodide electrolyte regenerates the dye. Invented by Michael Grätzel in 1991, these cells achieve 12–14% efficiency and can work in diffuse light and from flexible substrates.

Exemplo do cotidiano

Dye-sensitized solar cells can be made in colors and transparent forms, envisioned for building-integrated photovoltaics in windows.

Importância industrial

As células fotoeletroquímicas são comercializadas para colheita de energia interior em dispositivos IoT e aplicações decorativas. Oferecem vantagens de custo e flexibilidade em relação ao silício cristalino em aplicações específicas.

Propriedades

Tipo: Photochemical
Reversível: Sim
Energia: Endotérmico
Catalisador: Ruthenium bipyridyl dye

Reações relacionadas

Photochromism of Spiropyran Chlorophyll Fluorescence Photodegradation of Methylene Blue by TiO₂ Photodissociation of Chlorine Gas Silver Bromide Photodecomposition Cis-Trans Isomerization of Retinal Photosynthesis Ozone Formation by UV Light Silver Chloride Photodecomposition Photochemical Smog Formation (NO₂ Photolysis)

Frequently Asked Questions

What is the equation for Dye-Sensitized Solar Cell (Grätzel Cell)?

The balanced equation is: Dye + hν → Dye* → Dye⁺ + e⁻ (into TiO₂).

What type of reaction is Dye-Sensitized Solar Cell (Grätzel Cell)?

Dye-Sensitized Solar Cell (Grätzel Cell) is a photochemical reaction. It is reversible under certain conditions.

Is Dye-Sensitized Solar Cell (Grätzel Cell) exothermic or endothermic?

Dye-Sensitized Solar Cell (Grätzel Cell) is endothermic (absorbs energy).

What conditions are needed for Dye-Sensitized Solar Cell (Grätzel Cell)?

This reaction requires a catalyst (Ruthenium bipyridyl dye).