Journal
ACS NANO
Volume 5, Issue 10, Pages 8175-8186Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn2033117
Keywords
quantum dots; nanocrystals; PbS; photothermal stability; solar cells
Categories
Funding
- Department of Energy [DE-SC0003904]
- NSF
- Center for Advanced Solar Photophysics (CASP)
- Energy Frontier Research Center
- U.S. Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES)
- U.S. Department of Energy (DOE) [DE-SC0003904] Funding Source: U.S. Department of Energy (DOE)
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We combine optical absorption spectroscopy, ex situ transmission electron microscopy (TEM) Imaging, and variable-temperature measurements to study the effect of ultraviolet (UV) light and heat treatments on ethanedithiol-treated PbS quantum dot (QD) films as a function of ambient atmosphere, temperature, and QD size. Film aging occurs mainly by oxidation or ripening and sintering depending on QD size and the presence of oxygen. We can stop QD oxidation and greatly suppress ripening by infilling the films with amorphous Al2O3 using room-temperature atomic layer deposition (ALD).
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