Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 55, Issue 45, Pages 11700-11705Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.6b02698
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Funding
- National Natural Science Foundation of China [21474052]
- National Key Research and Development Program of China [2016YFB0401700]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Here, we report a facile and green route to prepare Cu-In-S (CIS)/ZnS core/shell quantum dots (QDs) embedded in polyvinylpyrrolidone (PVP) solids and their application as phosphors for white light-emitting diodes (WLEDs). CIS/ZnS core shell QDs were easily synthesized in the aqueous phase, assisted by microwave irradiation within 20 min at 95 degrees C. The emission wavelength of CIS/ZnS QDs could be tunable between a large range of 543-700 nm by adjusting the [Cu]/[In] ratios, and the photoluminescence (PL) quantum yield could be up to 43% by coating a ZnS layer. QD-embedded PVP solids then were facilely fabricated by mixing CIS/ZnS QDs and PVP in water, followed by drying, to show improved PL intensity, higher photostability, and higher thermostability. Finally, we demonstrated their potential application as a white light source by using green- and red emitting CIS/ZnS/PVP nanocomposite solids as color converters, in combination with a blue light-emitting diode (LED) chip.
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