Design of NIR-absorbing simple asymmetric squaraine dyes carrying indoline moieties for use in dye-sensitized solar cells with Pt-free electrodes |
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Authors: | Funabiki Kazumasa Mase Hiroyoshi Saito Yasuteru Otsuka Atsuhiro Hibino Atsuhiko Tanaka Nagisa Miura Hidetoshi Himori Yosuke Yoshida Tsukasa Kubota Yasuhiro Matsui Masaki |
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Affiliation: | Department of Materials Science and Technology Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, Japan. funabiki@gifu-u.ac.jp |
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Abstract: | Novel near-infrared (NIR)-sensitizing (up to 800 nm) simple asymmetric squaraine dyes (Sq 31 and Sq 33) carrying indoline moieties that did not require the introduction of any linker groups were developed. DSSCs fabricated with Sq 33 exhibited remarkable characteristics in the long-wavelength visible and NIR region (up to 800 nm), such as a conversion efficiency of 3.75% (AM 1.5G) with an incident photon-to-current conversion efficiency of 63% (650 nm), a short-circuit photocurrent density of 13.64 mA, an open-circuit photovoltage of 0.48, and a fill factor of 0.57. |
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