Dye-Sensitized Solar Cell (Grätzel Cell)

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

개요

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.

일상 속 예시

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

산업적 중요성

저비용 태양에너지 변환 기술로, 유연하고 반투명한 태양전지 제조가 가능합니다. 건물 일체형 태양광(BIPV) 및 실내 조명 에너지 수확 분야에 응용됩니다.

성질

유형
Photochemical
가역 반응
예
에너지
흡열
촉매
Ruthenium bipyridyl dye

관련 반응

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).