The high cost and instability of platinum (Pt) counter electrodes (CEs) are two persistent issues in dye-sensitized solar cells (DSSCs). Here, ternary selenide NiCoSe and RuCoSe-nanostructured CEs are prepared by a simple one-step hydrothermal method. We mainly investigate the synergistic effect of ternary transition metals on the electrocatalytic properties. As a result, the photoelectric conversion efficiency (PCE) of NiCoSe CEs DSSCs with the enhanced efficiency up to 8.19% can be achieved. The excellent catalytic properties of the NiCoSe alloy selenide on I₃^– can be attributed to the expanded active sites, matched work function, redistributed electron structures, and reduced interface resistance. The facile preparation approach and outstanding catalytic behaviors offer applications of available DSSCs with low cost, superior stability, and promising performance.

中文翻译：

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无铂三元金属硒化物通过界面工程作为高效染料敏化太阳能电池的纳米结构对电极

铂（Pt）对电极（CE）的高成本和不稳定性是染料敏化太阳能电池（DSSC）中两个长期存在的问题。在这里，通过简单的一步水热法制备三元硒化物NiCoSe和RuCoSe纳米结构的CE。我们主要研究三元过渡金属对电催化性能的协同作用。结果，可以实现效率高达8.19％的NiCoSe CEs DSSC的光电转换效率（PCE）。在I的NiCoSe合金硒化物的优异的催化性能₃ ^-可以归因于扩展的活性位点，匹配的功函数，重新分布的电子结构以及降低的界面电阻。简便的制备方法和出色的催化性能为低成本的DSSC提供了低成本，优异的稳定性和良好的性能。