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Molecular Engineering of D−π–A Type of Blue-Colored Dyes for Highly Efficient Solid-State Dye-Sensitized Solar Cells through Co-Sensitization
journal contribution
posted on 2018-09-27, 00:00 authored by Peng Liu, Linqin Wang, Karl Martin Karlsson, Yan Hao, Jiajia Gao, Bo Xu, Gerrit Boschloo, Licheng Sun, Lars KlooA novel
blue-colored organic donor-π-acceptor sensitizer,
the so-called MKA16 dye, has been employed to construct solid-state
dye-sensitized solar cells (ssDSSCs). Using 2,2′,7-,7′-tetrakis(N,N-di-p-methoxyphenyl-amine)
9,9′-spirobifuorene (Spiro-OMeTAD) as hole-transport material,
a good conversion efficiency of 5.8% was recorded for cells based
on the MKA16 dye and a high photovoltage of 840 mV in comparison with
5.6% efficiency using the known (Dyenamo Blue) dye. By co-sensitization
using the orange-colored D35 dye and MKA16 together, the solid-state
solar cells showed an excellent efficiency of 7.5%, with a high photocurrent
of 12.41 mA cm–2 and open-circuit voltage of 850
mV. The results show that the photocurrent of ssDSSCs can be significantly
improved by co-sensitization mainly attributed to the wider light
absorption range contributing to the photocurrent. In addition, results
from photo-induced absorption spectroscopy show that the dye regeneration
is efficient in co-sensitized solar cells. The current results possible
routes of improving the design of aesthetic and highly efficient ssDSSCs.
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MKA 16results showopen-circuit voltagehole-transport materialdye regenerationnovel blue-coloreddonor -π-acceptor sensitizerMKA 16 dye850 mVMolecular EngineeringDyenamo BluessDSSCBlue-Colored Dyeslight absorption rangeEfficient Solid-State Dye-Sensitized Solar Cellsconversion efficiencyphoto-induced absorption spectroscopy showphotocurrentco-sensitizationorange-colored D 35 dye840 mV
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