期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 7, 期 7, 页码 1315-1320出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.6b00177
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资金
- 3M Non-Tenured Faculty Award
- National Science Foundation [CHE-1552164]
- Department of Energy
- MRCAT member institutions
- DOE Office of Science [DE-AC02-06CH11357]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1552164] Funding Source: National Science Foundation
We demonstrate the ability of M2+ Lewis acids (M = Cd, Zn) to dramatically enhance the photoluminescence quantum yield (PL QY) of InP quantum dots. The addition of cadmium and zinc is additionally found to red- and blue-shift, respectively, the lowest energy absorption and emission of InP quantum dots while maintaining particle size. This treatment results in a facile strategy to post-synthetically tune the luminescence color in these materials. Optical and structural characterization (XRD, TEM, XAS, ICP) have led us to identify the primary mechanism of PL turn-on as surface passivation of phosphorus dangling bonds, affording PL QYs up to 49% without the growth of a type I shell or the addition of HF. This route to PL enhancement and color tuning may prove useful as a standalone treatment or as a complement to shelling strategies.
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