Electrodeposited Heterogeneous Nickel-Based Catalysts on Silicon for Efficient Sunlight-Assisted Water Splitting

Sol A. Lee, Ik Jae Park, Jin Wook Yang, Jaemin Park, Tae Hyung Lee, Changyeon Kim, Jooho Moon, Jin Young Kim, Ho Won Jang

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Selecting moderate semiconducting materials for photoelectrochemical (PEC) cells is essential to achieve high solar-energy conversion. Despite the advantageous features of silicon, such as earth abundance and narrow band gap, silicon suffers from severe photocorrosion. Here, heterogeneous nickel-based catalysts produced via electrodeposition are investigated to expedite water oxidation and protect the silicon from corrosion. The morphology of the catalysts and their PEC performances are demonstrated in detail. Synergistic Ni nanoparticles (NPs)/Ni(OH)2/n-Si photoanode shows a high photocurrent density of 29.6 mA cm−2 at 1.23 V versus RHE and operates over 140 h. Owing to the insufficient photovoltage generated by a single photoanode, we introduce a perovskite/Si tandem solar cell as a voltage supplier. The fabricated wired tandem device shows a photocurrent density of 9.8 mA cm−2, corresponding to a solar-to-hydrogen (STH) conversion efficiency of 12% without external bias. Our work may present a promising pathway toward a design of spontaneous energy conversion devices.

Original languageEnglish
Article number100219
JournalCell Reports Physical Science
Issue number10
Publication statusPublished - 2020 Oct 21

Bibliographical note

Publisher Copyright:
© 2020 The Author(s)

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • General Materials Science
  • General Chemistry
  • General Energy
  • General Engineering


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