Journal
ADVANCED ENERGY MATERIALS
Volume 7, Issue 17, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201602728
Keywords
2D nanoplatelets; hydrogen generation; near infrared; quantum yield
Categories
Funding
- Natural Science and Engineering Research Council of Canada (NSERC)
- Canada Foundation for Innovation (CFI)
- Fonds de recherche du Quebec - Nature et technologies (FRQNT)
- NSERC
- Fondazione Cariplo [20120824]
- COST Action [MP1302]
- European Commission [GA 299490]
- Kempe Foundation
- LTU Lab fund program
- UNESCO Chair in Materials and Technologies for Energy Conversion, Saving and Storage (MATECSS)
- government of China
- Sichuan 1000 talents short term award
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2D semiconducting nanoplatelets (NPLs) are an emerging class of photo-active materials. They can be used as building blocks in optoelectronic devices thanks to their large absorption coefficient, high carrier mobility, and unique thickness-dependent optical transitions. The main drawback of NPLs is their large lateral size, which results in unfavorable band energy levels and low quantum yield (QY). Here, ultrasmall lead chalcogenide PbSe1-xSx NPLs are prepared, which exhibit an unprecedented QY of approximate to 60%, the highest ever reported for this structure. The NPLs are applied as light absorber in a photoelectrochemical system, leading to a saturated photocurrent density of approximate to 5.0 mA cm(-2) (44 mL cm(-2) d(-1)), which is a record for NPL-based photo-electrodes in solar-driven hydrogen generation. Ultrasmall NPLs hold the potential for breakthrough developments in the field of optically active nanomaterials.
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