期刊
NANOTECHNOLOGY
卷 29, 期 14, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aaac01
关键词
photoelectrochemical; homojunction; nanocomposite; cuprous oxide
资金
- National Natural Science Foundation of China [51572239, 51372224, 91333203]
- Program for Innovative Research Team in University of Ministry of Education of China [IRT13037]
- National Science and Technology Support Program [2012BAC08B08]
- Major Project of Zhejiang Natural Science Foundation of China [LD18E020002]
As it is expected to be one of the most promising materials for utilizing solar energy, Cu2O has attracted considerable attention with respect to the achievement of solar energy conversion. Until now, the photocurrent densities of all planar structure of the Cu2O photocathode have not even come close to the theoretical value of -14.7 mA cm(-2) due to the incompatible light absorption and charge carrier diffusion lengths. Here, we have fabricated p-n Cu2O homojunction nanocomposite by multiple steps of electrochemical deposition processing with the optimization of deposition periods. The p-Cu2O/n-Cu2O nanocomposite fabricated by optimized pH (4.9) and deposition time (4 min) exhibited double the photocurrent density of that of the bare p-Cu2O photocathode. And the highest photocurrent density of nanostructured p-n Cu2O nanorod homojunction photocathode with a p-Cu2O blocking layer reached -10.0 mA cm(-2) at 0 V versus the reversible hydrogen electrode under simulated AM 1.5G illumination (100 mW cm(-2)).
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