Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 27, Issue 17, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201700051
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Funding
- National Natural Science Foundation of China [91622125, 51572023, 61405040, 51622205, 61675027]
- Natural Science Foundations of Beijing [2172036]
- Fundamental Research Funds for the Central Universities [FRF-TP-16-002A3]
- National Key R & D project, China [2016YFA0202703]
- National Postdoctoral Program for Innovative Talents [BX201600040]
- China Postdoctoral Science Foundation [2016M600976]
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The development of new luminescent materials for anticounterfeiting is of great importance, owing to their unique physical, chemical, and optical properties. The authors report the use of color-tunable colloidal CdS/ZnS/ZnS:Mn2+/ZnS core/multishell quantum dots (QDs)-functionalized luminescent polydimethylsiloxane film (LPF) for anticounterfeiting applications. Both luminescent QDs and as-fabricated, stretchable, and transparent LPF show blue and orange emission simultaneously, which are ascribed to CdS band-edge emission and the T-4(1) -> (6)A(1) transition of Mn2+, respectively; their emission intensity ratios are dependent on the power-density of a single-wavelength excitation source. Additionally, photoluminescence tuning of CdS/ZnS/ZnS:Mn2+/ZnS QDs in hexane or embedded in LPF can also be realized under fixed excitation power due to a resonance energy transfer effect. Tunable photoluminescence of these flexible LPF grafted doped core/shell QDs can be finely controlled and easily realized, depending on outer excitation power and intrinsic QD concentration, which is intriguing and inspires the fabrication of many novel applications.
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