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<p>In this article as an extension of our prior research investigations, we discuss and compare the properties of indole-based D-π-A and D-D-π-A structured dyes and their photovoltaic performances. The photophysical aspects and electrochemical attributes of the previously reported D-π-A and D-D-π-A structured indole dyes were examined to figure out the thermodynamic feasibility of the dyes to perform as photosensitizers. Furthermore, these dyes were used to&#xa0;fabricate&#xa0;dye-sensitized solar cells (DSSCs) and their photovoltaic activity was assessed. The interfacial charge transfer in the DSSCs was identified using electrochemical impedance analysis (EIS). CB-K<sub>2</sub>K<sub>1</sub>S dye-based DSSC device expressed the fill factor (FF) of 0.65, contributing to the highest open-circuit voltage (V<sub>OC</sub>) of 645.3&#xa0;mV and highest efficiency (η) of 4.33% since it has the highest short-circuit current density (J<sub>SC</sub>) of 9.8&#xa0;mA&#xa0;cm<sup>−2</sup>, in contrast to MB-K<sub>2</sub>K<sub>1</sub> dye which displayed V<sub>OC</sub> = 613.4&#xa0;mV, J<sub>SC</sub> = 7.6&#xa0;mA&#xa0;cm<sup>−2</sup>, FF = 0.63, η = 3.10%.</p>

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Power conversion efficiency and its comparison of D-π-A and D-D-π-A structured photo-sensitizers

  • 期刊论文

  • 发表日期：

    2025年4月16日

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  • Krupa Elsa Roys,
  • S. L. Manju,
  • Mohamed Siddiq,
  • Anandan Sambandam

摘要

In this article as an extension of our prior research investigations, we discuss and compare the properties of indole-based D-π-A and D-D-π-A structured dyes and their photovoltaic performances. The photophysical aspects and electrochemical attributes of the previously reported D-π-A and D-D-π-A structured indole dyes were examined to figure out the thermodynamic feasibility of the dyes to perform as photosensitizers. Furthermore, these dyes were used to fabricate dye-sensitized solar cells (DSSCs) and their photovoltaic activity was assessed. The interfacial charge transfer in the DSSCs was identified using electrochemical impedance analysis (EIS). CB-K2K1S dye-based DSSC device expressed the fill factor (FF) of 0.65, contributing to the highest open-circuit voltage (VOC) of 645.3 mV and highest efficiency (η) of 4.33% since it has the highest short-circuit current density (JSC) of 9.8 mA cm−2, in contrast to MB-K2K1 dye which displayed VOC = 613.4 mV, JSC = 7.6 mA cm−2, FF = 0.63, η = 3.10%.