Oxygen vacancies promoting photoelectrochemical performance of In(2)O(3) nanocubes.
Oxygen vacancies promoting photoelectrochemical performance of In(2)O(3) nanocubes.
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DOI：
10.1038/srep01021
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发表时间：
2013
影响因子：
4.6
通讯作者：
Tong, Yexiang
中科院分区：
文献类型：
--
作者：
Gan, Jiayong;Lu, Xihong;Wu, Jingheng;Xie, Shilei;Zhai, Teng;Yu, Minghao;Zhang, Zishou;Mao, Yanchao;Wang, Shing Chi Ian;Shen, Yong;Tong, Yexiang
本工作报告了一种简便的方法，制备新的光敏氧化铟薄膜，以及它们的光电化学（PEC）应用的实施。首先研究了氧空位与光电转换性能的关系，揭示了它们之间的规律。我们发现，优化的In 2 O3 −n样品产生的光电流密度高达3.83 mA/cm 2的1 M Na 2SO 4溶液在太阳光照射下。 它也给出了效率高达75%以上的入射光子到电流转换效率（IPCE）的光谱，这是最好的值为In 2 O3光阳极报道超过400 nm。 此外，这些薄膜的PEC性能增强，随着VO增加，然后随着进一步增加VO下降。这种双面效应意味着VO既可以促进光电子的激活，也可以作为复合中心阻止光电流的产生。在这项工作中制造高光活性的In 2 O3纳米结构将在各个领域开辟新的机会。
This work reports a facile method for preparing the new photoactive In2O3 films as well as their implementation in photoelectrochemical (PEC) application. We firstly investigated the relationship between oxygen vacancies (VO) and PEC performance and revealed a rule between them. We found that the optimized In2O3−n sample yielded a photocurrent density up to 3.83 mA/cm2 in 1 M Na2SO4 solution under the solar illumination. It also gave efficiency as high as 75% over 400 nm in the incident-photon-to-current-conversion efficiency (IPCE) spectrum, which is the best value for an In2O3 photoanode reported. Moreover, the PEC performance of these films is enhanced as the VO increased and then decreased with further increasing VO. This two-side effect means VO can favor the photoelectron activation, or act as recombination centers to prohibit the generation of photocurrent. Making highly photoactive In2O3 nanostructures in this work will open up new opportunities in various areas.
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