High-Performance Shortwave-Infrared Light-Emitting Devices Using Core-Shell (PbS-CdS) Colloidal Quantum Dots

被引：173
作者：
Supran, Geoffrey J. [1 ]
Song, Katherine W. [2 ]
Hwang, Gyu Weon [1 ]
Correa, Raoul E. [3 ]
Scherer, Jennifer [3 ]
Dauler, Eric A. [4 ]
Shirasaki, Yasuhiro [2 ]
Bawendi, Moungi G. [3 ]
Bulovic, Vladimir [2 ]
机构：
[1] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
[2] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
[3] MIT, Dept Chem, Cambridge, MA 02139 USA
[4] MIT, Lincoln Lab, Lexington, MA 02420 USA
来源：
ADVANCED MATERIALS | 2015年 / 27卷 / 08期
关键词：
WORK FUNCTION; DIODES; NANOCRYSTALS; EFFICIENT; EMISSION; ABSORPTION; MECHANISM; BRIGHT;
D O I：
10.1002/adma.201404636
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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 mu m, and results from the passivation of the PbS cores by the CdS shells against in situ photoluminescence quenching.
引用
收藏
页码：1437 / 1442
页数：6
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