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首页> 外文期刊>RSC Advances >New aspects of improving the performance of WO3 thin films for photoelectrochemical water splitting by tuning the ultrathin depletion region
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New aspects of improving the performance of WO3 thin films for photoelectrochemical water splitting by tuning the ultrathin depletion region

机译：通过调整超薄耗尽区来改善WO3薄膜在光电化学水分解中的性能的新方面

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In this work, we explored a facile, scalable and effective method for substantially enhancing photocurrent and incident-photon-to-current efficiency of WO _(3) thin-film photoanodes by a mild reduction treatment under low oxygen pressure. Experimental data from photoelectrochemical and electrochemical impedance spectroscopies have shown that such treatment can increase the charge carrier density on WO _(3) photoanode surfaces resulting in improvements in hole collection efficiency and reduction in charge recombination. Despite a much thinner layer of WO _(3) (about 500 nm) compared to those in other published studies, the electrodes exhibited an ultra-high photocurrent density of 1.81 mA cm ~(?2) at 1.23 V vs. RHE. This current density is one of the highest ones among WO _(3) -based photoanodes described in literature. The proposed surface modulation approach offers an effective and scalable method to prepare high-performance thin film photoanodes for photoelectrochemical water splitting.
机译：在这项工作中，我们探索了一种简便，可扩展且有效的方法，该方法通过在低氧气压力下进行温和的还原处理来显着提高WO_（3）薄膜光阳极的光电流和入射光子-电流效率。来自光电化学和电化学阻抗谱的实验数据表明，这种处理可以增加WO_（3）光阳极表面上的载流子密度，从而提高空穴收集效率并减少电荷复合。尽管与其他已发表的研究相比，WO_（3）的层薄得多（约500 nm），但电极在1.23 V vs. RHE的条件下仍具有1.81 mA cm〜（？2）的超高光电流密度。该电流密度是文献中描述的基于WO_（3）的光阳极中最高的电流密度之一。提出的表面调制方法提供了一种有效且可扩展的方法来制备用于光电电化学水分解的高性能薄膜光电阳极。

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