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

被引：174

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

页码：1437 / 1442

页数：6

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