Near-infrared absorbing squaraine dye with extended ¦Ð conjugation for dye-sensitized solar cells

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• 作者：Claudio Magistris ; Stefano Martiniani ; Nadia Barbero ; Jinhyung Park ; Caterina Benzi ; Assaf Anderson ; ChunHung Law ; Claudia Barolo ; Brian O'Regan
• 关键词：Dye-sensitized solar cell ; Near-infrared ; NIR squaraine ; DFT calculation
• 刊名：Renewable Energy
• 出版年：2013
• 出版时间：December, 2013
• 年：2013
• 卷：60
• 期：Complete
• 页码：672-678
• 全文大小：1364 K

文摘

A NIR absorbing squaraine dye has been synthesized as a sensitizer for use in dye-sensitized solar cells (DSCs). Following computational calculations, a benz[cd]indole moiety was selected as an electron-rich heterocyclic component and condensed with indole-based emisquaraine bearing a carboxyl group, as an anchor for their immobilization on TiO₂, to obtain an unsymmetrical squaraine with extended absorption due to its extensive ¦Ð conjugation. The cells based on this dye exhibited a spectral response in the near-infrared region over 750?nm in addition to the visible region with a light absorption edge at 900?nm. The cells showed 1.1 % efficiency and Incident Photon Current Efficiency (IPCE) of 36 % at 800?nm.