期刊
SMALL
卷 15, 期 27, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201901462
关键词
colloidal quantum dots; copper indium sulfide; light emission; shell growth
类别
资金
- Department of Energy (DOE), Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG02-07ER46454]
- Department of Defense, Air Force Office of Scientific Research, National Defense Science and Engineering Graduate (NDSEG) Fellowship [32 CFR 168a]
- National Aeronautics and Space Administration (NASA) [NNX16AM70H]
- MRSEC Program of the National Science Foundation [DMR-1419807]
- National Science Foundation Graduate Fellowship
Copper indium sulfide (CIS) colloidal quantum dots (QDs) are a promising candidate for commercially viable QD-based optical applications, for example as colloidal photocatalysts or in luminescent solar concentrators (LSCs). CIS QDs with good photoluminescence quantum yields (PLQYs) and tunable emission wavelength via size and composition control are previously reported. However, developing an understanding and control over the growth of electronically passivating inorganic shells would enable further improvements of the photophysical properties of CIS QDs. To improve the optical properties of CIS QDs, the focus is on the growth of inorganic shells via the popular metal-carboxylate/alkane thiol decomposition reaction. 1) The role of Zn-carboxylate and Zn-thiolate on the formation of ZnS shells on Cu-deficient CIS (CDCIS) QDs is studied, 2) this knowledge is leveraged to yield >90% PLQY CDCIS/ZnS core/shell QDs, and 3) a mechanism for ZnS shells grown from zinc-carboxylate/alkane thiol decomposition is proposed.
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