کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1647711 | 1007544 | 2012 | 4 صفحه PDF | دانلود رایگان |
CdS host nanocrystals (4.2–5.5 nm in diameter) have been prepared by a low-cost synthetic chemical route using air stable precursors and doped with rare earth (RE) ions, terbium (Tb3+) and ytterbium (Yb3+). The resulting RE3+-doped nanocrystals show a complete broadband absorption below their band edge (400–460 nm) to the deep UV region. CdS host nanocrystals act as an energy receptor and sensitizer for the RE3+-ions. A broadband emission in the visible region is observed for the RE3+-doped CdS nanocrystals by room temperature photoluminescence (PL) measurements. Our results show that these novel RE3+-doped nanocrystals can be used as an optical down-conversion material for solar spectral matching in solar cells or as a wavelength shifting down-converter for nanoscale optoelectronic applications.
► RE3+-doped CdS nanocrystals (4.2-5.5 nm in diameter) have been synthesized.
► Doped nanocrystals were characterized by XRD, TEM, and optical measurements.
► RE3+-doped nanocrystals showed optical down-conversion properties.
► These wavelength shifting materials can be used for solar spectral matching.
Journal: Materials Letters - Volume 66, Issue 1, 1 January 2012, Pages 46–49