10.1021/am403668d.s001
Huiyang Li
Huiyang
Li
Yingqin Hou
Yingqin
Hou
Yizhou Yang
Yizhou
Yang
Runli Tang
Runli
Tang
Junnian Chen
Junnian
Chen
Heng Wang
Heng
Wang
Hongwei Han
Hongwei
Han
Tianyou Peng
Tianyou
Peng
Qianqian Li
Qianqian
Li
Zhen Li
Zhen
Li
Attempt
to Improve the Performance of Pyrrole-Containing Dyes in Dye Sensitized Solar Cells by Adjusting
Isolation Groups
American Chemical Society
2013
sensitizer
chromophore
dye
efficiency
DSC
FF
isolation groups
Dye Sensitized Solar Cells
conversion
isolation group
LI
performance
2013-12-11 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Attempt_to_Improve_the_Performance_of_Pyrrole_Containing_Dyes_in_Dye_Sensitized_Solar_Cells_by_Adjusting_Isolation_Groups/2343079
Four new pyrrole-based organic sensitizers
with different isolation groups were conveniently synthesized and
applied to dye sensitized solar cells (DSCs). The introduction of
isolation group in the side chain could both suppress the formation
of dye aggregates and electron recombination. Especially, when two
pieces of D-π-A chromophore moieties shared one isolation group
to construct the “H” type dye, the performance was further
improved. Consequently, in the corresponding solar cell of <b>LI-57</b>, a short-circuit photocurrent density (<i>J</i><sub>sc</sub>) was tested to be 13.85 mA cm<sup>–2</sup>, while 0.72 V
for the open-circuit photovoltage (<i>V</i><sub>oc</sub>), 0.64 for the fill factor (FF), and 6.43% for the overall conversion
efficiency (η), exceeding its analogue <b>LI-55</b> (5.94%)
with the same isolation group. The results demonstrated that both
the size (bulk and shape) and the linkage mode between the D-π-A
chromophores and the isolation groups, could affect the performance
of sensitizers in DSCs in a large degree, providing a new approach
to optimize the chemical structure of dyes to achieve high conversion
efficiencies.