Optimization and stabilization of electrodeposited Cu2ZnSnS4 photocathodes for solar water reduction.
Optimization and stabilization of electrodeposited Cu2ZnSnS4 photocathodes for solar water reduction.
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DOI：
10.1021/am402096r
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发表时间：
2013-08
影响因子：
9.5
通讯作者：
L. Rovelli;S. Tilley;K. Sivula
中科院分区：
文献类型：
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作者：
L. Rovelli;S. Tilley;K. Sivula
Cu2ZnSnS4 （CZTS）是一种很有前途的p型半导体，但尚未被广泛研究用于水裂解太阳能燃料生产。在这里，我们优化和比较了两种不同的电沉积路线（同步和顺序）来制备CZTS电极。同时路径观察到更一致的结果。此外，还研究了蚀刻和CdS缓冲层的存在对光电流的影响。最后，我们首次展示了利用原子层沉积（ALD）沉积的保护层来稳定这些电极。我们的最佳保护电极（Mo/CZTS/CdS/AZO/TiO2/Pt）在标准太阳光照条件下表现出超过1 mA cm（-2）的光电流，并且比未保护电极的稳定性显着提高。
Cu2ZnSnS4 (CZTS) is a promising p-type semiconductor that has not yet been extensively investigated for solar fuel production via water splitting. Here, we optimize and compare two different electrodeposition routes (simultaneous and sequential) for preparing CZTS electrodes. More consistent results are observed with the simultaneous route. In addition, the effect of etching and the presence of a CdS buffer layer on the photocurrent are investigated. Finally, we demonstrate for the first time the stabilization of these electrodes using protecting overlayers deposited by atomic layer deposition (ALD). Our best performing protected electrodes (Mo/CZTS/CdS/AZO/TiO2/Pt) exhibited a photocurrent of over 1 mA cm(-2) under standard one sun illumination conditions and a significant improvement in stability over unprotected electrodes.