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

IF 2.7 3区化学 Q3 BIOCHEMISTRY & MOLECULAR BIOLOGY

Photochemical & Photobiological Sciences Pub Date : 2025-04-01 Epub Date: 2025-04-16 DOI:10.1007/s43630-025-00713-y

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

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Abstract

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 (V_OC) of 645.3 mV and highest efficiency (η) of 4.33% since it has the highest short-circuit current density (J_SC) of 9.8 mA cm^-2, in contrast to MB-K₂K₁ dye which displayed V_OC = 613.4 mV, J_SC = 7.6 mA cm^-2, FF = 0.63, η = 3.10%.

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D-π-A和D-D-π-A结构光敏剂的功率转换效率及其比较。

本文对吲哚基D-π-A和D-D-π-A结构染料的性质及其光伏性能进行了讨论和比较。考察了已报道的D-π-A和D-D-π-A结构吲哚染料的光物理性质和电化学性质，以确定染料作为光敏剂的热力学可行性。此外，将这些染料用于制备染料敏化太阳能电池（DSSCs），并对其光伏活性进行了评估。利用电化学阻抗分析（EIS）对DSSCs的界面电荷转移进行了表征。CB-K2K1S染料基DSSC器件的填充因子（FF）为0.65，最高开路电压（VOC）为645.3 mV，最高效率（η）为4.33%，因为其最高短路电流密度（JSC）为9.8 mA cm-2，而MB-K2K1染料的短路电流密度为613.4 mV, JSC = 7.6 mA cm-2, FF = 0.63, η = 3.10%。

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