Broadband solar harvesting in functional electrode on silicon for hydrogen generation

Mao Qugn Wei, Yu Sheng Lai, Po Hsien Tseng, Mei Yi Li, Shao Hui Hsu, Cheng Ming Huang, Shao Chin Tseng, Mau Tsu Tang, Fu-Hsiang Ko*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A three-dimensional functional silver electrode on silicon with a trench-like optical structure realizes both broadband light harvesting and spontaneous oxidation reaction in 1 M sodium chloride solution through the silver chloride examined during hydrogen preparation. A standard electrode potential (Eo) of -0.23 V in the complete electrochemical reaction benefits hydrogen preparation without external bias. The proposed solar harvester under no power operation achieves 10 to 100 times the photoresponsivity and broader solar harvesting of previous studies. This work also provides the open-circuit voltage of 0.35V under one sun (100mW cm-2) illumination to accelerate the electrochemical reaction. The actual demonstration of hydrogen preparation, relying only on outdoor solar power, confirms the effectiveness of the proposed strategy.

Original languageEnglish
Article number117001
Pages (from-to)1-5
Number of pages5
JournalApplied Physics Express
Issue number11
StatePublished - Nov 2021


Dive into the research topics of 'Broadband solar harvesting in functional electrode on silicon for hydrogen generation'. Together they form a unique fingerprint.

Cite this