Magnesium sulfate as a potential dye additive for chlorophyll-based organic sensitiser of the dye-sensitised solar cell (DSSC)

AA Khan, MYS Adilah, MH Mamat, SZ Yahaya… - … Acta Part A: Molecular …, 2022 - Elsevier
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2022Elsevier
In this work, a new chlorophyll dye-sensitiser derived from mitragyna speciosa (MS) leaves,
also known as Kratom, was employed for dye-sensitised solar cells (DSSCs). The influence
of magnesium sulfate (MgSO 4), a low-cost dye additive, and suitable extraction solvents on
the performance of DSSCs were examined. Here, the optical properties were investigated
using UV–Visible spectroscopy and the functional anchoring group were investigated by
FTIR spectroscopy. Meanwhile, the photovoltaic parameters were investigated by IV …
Abstract
In this work, a new chlorophyll dye-sensitiser derived from mitragyna speciosa (MS) leaves, also known as Kratom, was employed for dye-sensitised solar cells (DSSCs). The influence of magnesium sulfate (MgSO4), a low-cost dye additive, and suitable extraction solvents on the performance of DSSCs were examined. Here, the optical properties were investigated using UV–Visible spectroscopy and the functional anchoring group were investigated by FTIR spectroscopy. Meanwhile, the photovoltaic parameters were investigated by I-V measurements. The highest conversion efficiency is obtained when using a dye extracted from methanol solvent in combination with MgSO4 additive, namely methanolic magnesium sulfate (MMSO). This higher power conversion efficiency is mainly attributed to the enhancement of the hydroxyl group in the MMSO dye solutions, which promotes higher dye adsorption and provides an organic dye passivation layer that reduces back-recombination in the cell. Furthermore, MgSO4 aids in the replenishment of magnesium lost in the chlorophyll porphyrin ring during the degradation process. These combined effects have contributed to the overall conversion efficiency of the MMSO cell at 0.26 %, followed by 0.24 % for ethanolic magnesium sulfate (EMSO), respectively.
Elsevier
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