High performance H2 evolution realized in 20 mm- thin silicon nanostructured photocathodes
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- 2023년 8월 12일
- 1분 분량
Jin-Young Jung, Min-Joon Park, Xiaopeng Li, Jong-Ho Kim, Ralf B.Wehrspohn and Jung-Ho Lee
Abstract
Thickness reduction in high-purity silicon wafers is beneficial for cost-efficient hydrogen evolution utilizing silicon photocathodes. However, two major issues need to be resolved: insufficient light absorption by a thin Si absorber and poor charge transfer reaction by dominant surface recombination. Here, we present 20 μm-thin Si photocathodes employing Pt-nanoparticle-coated silicon nanoholes that realize a photocurrent of 23 mA cm−2 (at 0 V vs. RHE) corresponding to the amount typically achieved by a conventional wafer (∼200 μm-thick).
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