TY - JOUR
T1 - Synthesis and photovoltaic properties of organic dyes containing N-fluoren-2-yl dithieno[3,2-b:2′,3′-d]pyrrole and different donors
AU - Kumar, Sunil
AU - Justin Thomas, K. R.
AU - Li, Chun Ting
AU - Ho, Kuo Chuan
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/7/18
Y1 - 2015/7/18
N2 - Abstract New organic dyes containing fluorene appended dithienopyrrole as electron rich linker, different arylamine/heterocyclic units as conjugating donors and cyanoacrylic acid as acceptor have been synthesized and characterized as sensitizers for dye-sensitized solar cells. The effect of different conjugated donors such as triarylamine, carbazole and phenothiazine on the photophysical, electrochemical and photovoltaic properties is investigated. The optical and electrochemical properties of the dyes are strongly influenced by conjugating donors. The dye containing phenothiazine donor exhibited longer wavelength absorption and low oxidation potential. The time dependent density functional calculations performed on the dye models reveal charge transfer character for the longer wavelength absorption. The dye-sensitized solar cells fabricated using a dye containing fluorenyldiphenylamine donor displayed highest power conversion efficiency (6.81%) in the series originating from the high short circuit current density (JSC = 14.01 mA cm-2) and high open circuit voltage (VOC = 738 mV).
AB - Abstract New organic dyes containing fluorene appended dithienopyrrole as electron rich linker, different arylamine/heterocyclic units as conjugating donors and cyanoacrylic acid as acceptor have been synthesized and characterized as sensitizers for dye-sensitized solar cells. The effect of different conjugated donors such as triarylamine, carbazole and phenothiazine on the photophysical, electrochemical and photovoltaic properties is investigated. The optical and electrochemical properties of the dyes are strongly influenced by conjugating donors. The dye containing phenothiazine donor exhibited longer wavelength absorption and low oxidation potential. The time dependent density functional calculations performed on the dye models reveal charge transfer character for the longer wavelength absorption. The dye-sensitized solar cells fabricated using a dye containing fluorenyldiphenylamine donor displayed highest power conversion efficiency (6.81%) in the series originating from the high short circuit current density (JSC = 14.01 mA cm-2) and high open circuit voltage (VOC = 738 mV).
KW - Dithienopyrrole
KW - Dye-sensitized solar cells
KW - Fluorene
KW - Optical spectra
KW - Organic dyes
KW - Theoretical calculations
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U2 - 10.1016/j.orgel.2015.07.019
DO - 10.1016/j.orgel.2015.07.019
M3 - Article
AN - SCOPUS:84937215249
VL - 26
SP - 109
EP - 116
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
SN - 1566-1199
M1 - 3181
ER -