Dye-Sensitized Solar Cell (Grätzel Cell)

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

Tổng quan

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.

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

DSSCs are commercialized for indoor energy harvesting in IoT devices and decorative solar panels. They work well under low-light conditions.

Tính chất

Loại: Photochemical
Thuận nghịch: Có
Năng lượng: Thu nhiệt
Chất xúc tác: Ruthenium bipyridyl dye

Phản ứng liên quan

Cis-Trans Isomerization of Retinal Silver Chloride Photodecomposition Luminol Chemiluminescence Firefly Bioluminescence (Luciferin Oxidation) Photolysis of Water (Vacuum UV) Photochemical Smog Formation (NO₂ Photolysis) Photodegradation of Methylene Blue by TiO₂ Photodissociation of Chlorine Gas Silver Bromide Photodecomposition Chlorophyll Fluorescence

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).