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Effects of lithium (Li) on lithium-cuprous-oxide (Li-Cu2O) composite films grown by using electrochemical deposition for a PEC photoelectrode

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Abstract

In this study, Li-Cu2O composite films were grown on fluorine-doped tin-oxide (FTO) substrates by using the electrochemical deposition method. Various amounts of lithium (Li) were added to grow the Li-Cu2O composite films. We analyzed the morphology, structure, photocurrent density and photo-stability of the Li-Cu2O composite films by using various measurements such as field-emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and potentiostat/galvanostat measurements, respectively. As a result, the highest XRD Cu2O (111)/ LiO (011) peak intensity ratio was obtained for the 10-wt% sample, which also had the highest photocurrent density value of -5.00 mA/cm2. The highest photocurrent density value for the 10-wt% sample was approximately 5 times greater than that of the 0-wt% sample. As shown by this result, we found that adding Li could improve the photocurrent values of Li-Cu2O composite films.

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Authors and Affiliations

  1. Department of Nano Science and Engineering, High Safety Vehicle Core Technology Research Center, Inje University, Gimhae, 50834, Korea

    Tae Gyoum Kim & Hyukhyun Ryu

  2. Department of Materials and Components Engineering, Dong-Eui University, Busan, 47340, Korea

    Won-Jae Lee

Authors
  1. Tae Gyoum Kim
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  2. Hyukhyun Ryu
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  3. Won-Jae Lee
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Correspondence to Hyukhyun Ryu.

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Kim, T.G., Ryu, H. & Lee, WJ. Effects of lithium (Li) on lithium-cuprous-oxide (Li-Cu2O) composite films grown by using electrochemical deposition for a PEC photoelectrode. Journal of the Korean Physical Society 68, 268–273 (2016). https://doi.org/10.3938/jkps.68.268

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  • DOI: https://doi.org/10.3938/jkps.68.268

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