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Fabrication of TiOx/Sb2Se3/p-NiOxphotocathode for efficient photoelectrochemical water reduction
Applied Physics Letters ( IF 3.5 ) Pub Date : 2021-09-07 , DOI: 10.1063/5.0058093
Peiyuan Li 1 , Xiangbao Yuan 1 , Menglei Feng 1 , Feng Ran 1 , Dingke Zhang 2 , Shijian Chen 1
Affiliation  

Photoelectrochemical (PEC) water splitting directly converts solar energy into clean and sustainable hydrogen energy, representing a promising and effective technique for solving the world's energy crisis. A hole transfer layer (HTL) plays a vital role for extracting holes from a semiconductor layer to a back electrode in PEC cells for water splitting. In this work, a TiOx/Sb2Se3/NiOx photocathode was fabricated by using p-NiOx as HTL. We show that the electrical properties of NiOx films can be well adjusted by the pulsed laser deposition technique. By systematically adjusting the electrical properties of the NiOx HTL and passivating the surface defects through coating with the TiOx layer, we achieved a high photocurrent density of up to −18.08 mA cm−2 at 0 V vs a reversible hydrogen electrode (RHE), an onset potential of 0.43 V vs RHE, and a half-cell solar to hydrogen conversion efficiency of 1.01% for the TiOx/Sb2Se3/NiOx photocathode. This work demonstrated NiOx as a potential hole transport material for a cost-effective Sb2Se3 PEC cell.

中文翻译:

TiOx/Sb2Se3/p-NiOx光电阴极的制备用于高效光电化学减水

光电化学(PEC)水分解直接将太阳能转化为清洁和可持续的氢能,是解决世界能源危机的一种有前途和有效的技术。空穴传输层 (HTL) 在将空穴从半导体层提取到 PEC 电池的背电极以进行水分解方面起着至关重要的作用。在这项工作中,通过使用 p-NiO x作为 HTL制造了 TiO x /Sb 2 Se 3 /NiO x光电阴极。我们表明,可以通过脉冲激光沉积技术很好地调整NiO x薄膜的电性能。通过系统地调整 NiO x的电性能HTL 并通过涂覆 TiO x层钝化表面缺陷,我们在 0 V vs 可逆氢电极 (RHE) 下实现了高达 -18.08 mA cm -2的高光电流密度,0.43 V vs RHE 的起始电位, TiO x /Sb 2 Se 3 /NiO x光电阴极的半电池太阳能到氢的转换效率为1.01% 。这项工作证明了 NiO x作为具有成本效益的 Sb 2 Se 3 PEC 电池的潜在空穴传输材料。
更新日期:2021-09-10
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