Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA.
Adv Mater. 2015 Feb 25;27(8):1437-42. doi: 10.1002/adma.201404636. Epub 2015 Jan 8.
Core-shell PbS-CdS quantum dots enhance the peak external quantum efficiency of shortwave-infrared light-emitting devices by up to 50-100-fold (compared with core-only PbS devices). This is more than double the efficiency of previous quantum-dot light-emitting devices operating at wavelengths beyond 1 μm, and results from the passivation of the PbS cores by the CdS shells against in situ photoluminescence quenching.
核壳型 PbS-CdS 量子点将短波近红外发光器件的峰值外量子效率提高了 50-100 倍（与仅含核的 PbS 器件相比）。这比之前在 1 μm 以上波长下运行的量子点发光器件的效率提高了一倍以上，这是由于 CdS 壳对 PbS 核的原位光致荧光猝灭的钝化作用所致。
