期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 250, 期 -, 页码 234-241出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2019.03.028
关键词
Nanoplatelets; SnSe; Cation exchange; Hydrogen generation; Optoelectronic technologies
资金
- Natural Science Foundation of Shandong Province [ZR2018MB001]
- Qingdao University
- National Basic Research Program (973 Program) of China [2013CB933301]
- Natural Science Foundation of China [NSFC-51272038]
- Natural Science and Engineering Research Council of Canada (NSERC)
- Canada Foundation for Innovation (CFI)
- Fonds de recherche du Quebec - Nature et technologies (FRQNT)
- Canada Research Chairs program
- Sichuan 1000 talents
- government of China
Metal chalcogenide semiconducting nanoplatelets exhibit a broad absorption spectrum, as well as thickness dependent optical and electronic properties. As such, they may be used as building blocks in a variety of optoelectronic devices. The direct synthesis of heavy-metal-free ultra-small sized nanoplatelets is still challenging, due to the inherent limits in existing synthetic approaches. Here, we report an efficient template-assisted cation exchange route to synthesize heavy metal free metal chalcogenide nanoplatelets that are optically active in the near infrared. The SnSe nanoplatelets, whose lateral dimension is 6-10 mn, exhibit a quantum yield of 20%. The nanoplatelets are applied as light absorbers in a photoelectrochemical (PEC) system for hydrogen generation, leading to a saturated photocurrent density of 7.4 mA/cm(2), which is a record for PEC devices using heavy metal free colloidal quantum dots or nanoplatelets under identical measurement conditions. Our results indicate that quasi-zero-dimensional SnSe nanoplatelets hold great potential as efficient light absorbers for emerging optoelectronic technologies.
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