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 π conjugation. The cells based on this dye exhibited a spectral response in the near-infrared region over 750nm in addition to the visible region with a light absorption edge at 900nm. The cells showed 1.1% efficiency and Incident Photon Current Efficiency (IPCE) of 36% at 800nm.
Near-infrared Absorbing Squaraine Dye with extended π conjugation for Dye-sensitized Solar Cells
MAGISTRIS, CLAUDIO;BARBERO, Nadia;PARK, JINHYUNG;BAROLO, CLAUDIA;
2013-01-01
Abstract
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 π conjugation. The cells based on this dye exhibited a spectral response in the near-infrared region over 750nm in addition to the visible region with a light absorption edge at 900nm. The cells showed 1.1% efficiency and Incident Photon Current Efficiency (IPCE) of 36% at 800nm.
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