Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 4, Issue 3, Pages 581-588Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5tc04019a
Keywords
-
Funding
- National Natural Science Foundation of China (NSFC) [61106066]
- Zhejiang Provincial Science Foundation [LY14F040001]
- Ningbo Municipal Natural Science Foundation [2015A610241]
Ask authors/readers for more resources
Recently, Cu-doped ternary chalcogenide quantum dots (QDs) have attracted extensive attention due to their large Stokes shift and tunable photoluminescence (PL) behavior in the visible and near-infrared (NIR) spectral range, and particularly for their remarkably lower toxicity than their Cd-based counterparts. However, there still remain material-and fabrication-related obstacles in realizing high-performance Cu-doped QDs, which limit their promising applications in light-emitting devices and bio-labeling. In the present study, we report the facile synthesis of high-qualified Cu-doped Zn-In-Se QDs via a hot injection approach, using a heterogeneous dispersion of Se in octadecene (ODE) as a green Se precursor. With variation of the ratios of Zn to In, the obtained Cu-doped Zn-In-Se QDs exhibited composition-tunable PL emissions over the most visible spectral window (ca. 565-710 nm) with a PL quantum yield (QY) up to 38% after coating ZnSe shells, which is the highest one ever reported in this system. Furthermore, we report, for the first time, the exploration of QD light-emitting diodes (QD-LEDs) based on the Cu-doped Zn-In-Se QDs as the active layer, which had a maximum luminance of 320 cd m(-2) and a luminous efficiency (LE) of 0.97 cd A(-1) (at 98 cd m(-2)), suggesting their promising potential for application in optoelectronic devices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available