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Issue 45, 2018
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Improved conversion efficiency of 10% for solid-state dye-sensitized solar cells utilizing P-type semiconducting CuI and multi-dye consisting of novel porphyrin dimer and organic dyes

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Abstract

To realize highly efficient solid-state dye-sensitized solar cells (SDSCs), the absorption range of the dye should be extended to the near-IR range to increase short-circuit current density (Jsc); a high Jsc in turn requires a highly conductive p-type semiconductor. A newly developed dye (DIPDAB2) with a porphyrin dimer structure provided higher absorption coefficients than the conventional dye with a similar framework (DTBC) in the long wavelength range of 700–800 nm, leading to higher incident photon-to-current conversion efficiencies. The dip in the absorption spectrum of DIPDAB2 located at 500–700 nm between the Soret band and Q band was filled by combining with two kinds of organic dyes (D131 and D358). The multi-dye consisting of the three dyes realized a high Jsc over 20 mA cm−2. The use of copper iodide that has a higher conductivity than p-type organic semiconductors and copper complexes secured a high filling factor. Introduction of Li ions into the TiO2 photoelectrodes improved the open-circuit voltage (Voc) along with a slight increase in Jsc. Light soaking also contributed to a higher Voc. The conversion efficiency of the present SDSC was as high as 10%.

Graphical abstract: Improved conversion efficiency of 10% for solid-state dye-sensitized solar cells utilizing P-type semiconducting CuI and multi-dye consisting of novel porphyrin dimer and organic dyes

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Publication details

The article was received on 04 Jul 2018, accepted on 31 Oct 2018 and first published on 01 Nov 2018


Article type: Communication
DOI: 10.1039/C8TA06418K
Citation: J. Mater. Chem. A, 2018,6, 22508-22512
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    Improved conversion efficiency of 10% for solid-state dye-sensitized solar cells utilizing P-type semiconducting CuI and multi-dye consisting of novel porphyrin dimer and organic dyes

    N. Kato, S. Moribe, M. Shiozawa, R. Suzuki, K. Higuchi, A. Suzuki, M. Sreenivasu, K. Tsuchimoto, K. Tatematsu, K. Mizumoto, S. Doi and T. Toyoda, J. Mater. Chem. A, 2018, 6, 22508
    DOI: 10.1039/C8TA06418K

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