Bismuth sulfide (Bi₂S₃); is a non-toxic metal chalcogenide and a promising semiconductor in energy storage devices, but it has not received much attention in the regime of dye sensitized solar cells (DSSCs). The present research describes the synthesis of highly electro-catalytic active counter electrode (CE) material for quasi-solid state dye sensitized solar cells (QDSSCs), namely carbonous metallic heterostructure composite (CMHC), composed of solution processed bismuth sulfide nanorods and modified Multi walled carbon nanotubes (MWCNTs). Due to the positive synergistic effect of conductive MWCNT network and rod-like morphology of bismuth sulfide, the composite exhibits multifunctional characteristics of high conductivity, superior electro-catalytic activity and optimal porosity. The carbonous composite with a dominant oxygen rich surface shows enhanced electro-catalytic activity, low charge transfer resistance (R_CT), and exceptional cyclic stability as compared with pristine bismuth sulfide. The as-synthesized composite exhibit a very low charge transfer resistance of 0.9 Ω which signifies a fast electron transport mechanism. The suggested composite CE with 3% polymer gel electrolyte achieves a high efficiency of 8.24% comparable to Pt (8.47%). Based on the facile synthesis of composites and excellent performance of CE, the designed quasi-solid state dye sensitized solar cells stand out as an efficient next generation solar cells.

硫化铋（Bi ₂ S ₃）; 硫是一种无毒的金属硫属元素化物，是能量存储设备中有希望的半导体，但在染料敏化太阳能电池（DSSC）的研究中并未引起足够的重视。本研究描述了用于准固态染料敏化太阳能电池（QDSSCs）的高电催化活性对电极（CE）材料的合成，即含碳金属异质结构复合材料（CMHC），该材料由溶液加工的硫化铋纳米棒和改性的Multi壁碳纳米管（MWCNT）。由于导电MWCNT网络的积极协同作用和硫化铋的棒状形态，该复合材料具有高导电性，优异的电催化活性和最佳孔隙率的多功能特性。_CT），并且与原始硫化铋相比具有出色的循环稳定性。合成后的复合材料的电荷转移电阻非常低，仅为0.9Ω，这表明电子传输机制很快。所建议的具有3％聚合物凝胶电解质的复合材料CE可实现与Pt（8.47％）相当的8.24％的高效率。基于复合材料的简便合成和出色的CE性能，设计的准固态染料敏化太阳能电池脱颖而出，成为高效的下一代太阳能电池。