Dye-Sensitized Solar Cell (Grätzel Cell)

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

概要

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.

日常の例

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

産業上の重要性

DSSCはIoTデバイスや装飾用太陽パネルの屋内エネルギーハーベスティングに商業化されている。建物一体型光電変換（BIPV）や携帯電子機器への応用研究が進んでいる。

特性

タイプ
Photochemical
可逆的
はい
エネルギー
吸熱性
触媒
Ruthenium bipyridyl dye

関連する反応

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).