TY - JOUR
T1 - Novel diyne-bridged dyes for efficient dye-sensitized solar cells
AU - Fang, Jing Kun
AU - Sun, Tengxiao
AU - Tian, Yi
AU - Zhang, Yingjun
AU - Jin, Chuanfei
AU - Xu, Zhimin
AU - Fang, Yu
AU - Hu, Xiangyu
AU - Wang, Haobin
N1 - Funding Information:
This work was supported by the Natural Science Foundation of Jiangsu Province (BK20140780).
PY - 2017/7/1
Y1 - 2017/7/1
N2 - Three new metal free organic dyes (FSD101-103) were synthesized to investigate the influence of diyne unit on dye molecules. FSD101 and FSD102 with diyne unit and FSD103 with monoyne unit were applied as sensitizers in the dye-sensitized solar cells (DSSCs). The optical and electrochemical properties, theoretical studies, and photovoltaic parameters of DSSCs sensitized by these dyes were systematically investigated. By replacing the monoyne unit with a diyne unit, FSD101 exhibited broader absorption spectrum, lower IP, higher EA, lower band gap energy, higher oscillator strength, more efficient electron injection ability, broader IPCE response range and higher τe in comparison with FSD103. Hence, DSSC sensitized by FSD101 showed higher Jsc and Voc values, and demonstrated a power conversion efficiency of 3.12%, about 2-fold as that of FSD103 (1.55%). FSD102 showed similar results as FSD101, with a power conversion efficiency of 2.98%, despite a stronger electron withdraw cyanoacrylic acid group was introduced. This may be due to the lower efficiency of the electron injection from dye to TiO2 and lower τe of FSD102 than that of FSD101. These results indicate that the performance of DSSCs can be significantly improved by introducing a diyne unit into this type of organic dyes.
AB - Three new metal free organic dyes (FSD101-103) were synthesized to investigate the influence of diyne unit on dye molecules. FSD101 and FSD102 with diyne unit and FSD103 with monoyne unit were applied as sensitizers in the dye-sensitized solar cells (DSSCs). The optical and electrochemical properties, theoretical studies, and photovoltaic parameters of DSSCs sensitized by these dyes were systematically investigated. By replacing the monoyne unit with a diyne unit, FSD101 exhibited broader absorption spectrum, lower IP, higher EA, lower band gap energy, higher oscillator strength, more efficient electron injection ability, broader IPCE response range and higher τe in comparison with FSD103. Hence, DSSC sensitized by FSD101 showed higher Jsc and Voc values, and demonstrated a power conversion efficiency of 3.12%, about 2-fold as that of FSD103 (1.55%). FSD102 showed similar results as FSD101, with a power conversion efficiency of 2.98%, despite a stronger electron withdraw cyanoacrylic acid group was introduced. This may be due to the lower efficiency of the electron injection from dye to TiO2 and lower τe of FSD102 than that of FSD101. These results indicate that the performance of DSSCs can be significantly improved by introducing a diyne unit into this type of organic dyes.
KW - Anthracene
KW - Diyne
KW - Dye-sensitized solar cells
KW - Organic dyes
KW - Photovoltaic performances
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U2 - 10.1016/j.matchemphys.2017.03.047
DO - 10.1016/j.matchemphys.2017.03.047
M3 - Article
AN - SCOPUS:85018258066
VL - 195
SP - 1
EP - 9
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
SN - 0254-0584
ER -
