화학공학소재연구정보센터
Journal of the Korean Industrial and Engineering Chemistry, Vol.15, No.3, 265-277, May, 2004
염료감응 태양전지
Dye-Sensitized Solar Cell
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초록
빛에너지를 전기에너지로 직접 변환 시키는 태양전지는 구성하는 물질에 따라 무기물 태양전지와 유기물 태양전지로 나눌 수 있다. 무기물 태양전지는 실리콘, 화합물반도체 등의 소재가 pn 접합으로 구성되어 있으며, 유기물 태양전지는 염료분자가 나노결정 입자 표면에 흡착되어 있는 것을 특징으로 하는 염료감응형과 donor-acceptor 특성의 유기(고)분자형으로 나눌 수 있다. 특히 염료감응형 유기태양전지는 높은 에너지변환 효율(약 11%)과 매우 낮은 제조가격 때문에 차세대 태양전지로 각광받고 있다. 본 총설에서는 염료감응 태양전지의 구조 및 작동원리를 설명하고, 최근의 연구개발 및 산업동향을 소개하였다.
Solar cells, converting directly light into electricity, can be categorized by materials comprising solar cells: inorganic-type and organic-type solar cells. Inorganic solar cells are composed of inorganic n-type and p-type materials such as silicon and compound semiconductors, where the structure of inorganic solar cell is typically built by pn junction. For the organic solar cells, there are two types; dye-sensitized solar cell and organic donor-acceptor solar cell. Dye-sensitized solar cell, consisting if nanocrystalline oxide film sensitized with dye molecule, redox electrolyte and metal counter electrode, is considered as alternative to conventional solar cells due to its high solar-to-electricity conversion efficiency (ca. 11%) and low cost. In this article, the structure, the operation principle and the recent R&D and industrial trends of dye-sensitized solar cells are discussed.
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