Infrared light-emitting diodes based on colloidal PbSe/PbS core/shell nanocrystals

Hyun，Byung Ryool1; Marus，Mikita1; Zhong，Huaying1; Li，Depeng1; Liu，Haochen1; Xie，Yue1; Koh，Weon Kyu2; Xu，Bing1,3; Liu，Yanjun1; Sun，Xiao Wei1,3

2020

10.1088/1674-1056/ab5fb7

Chinese Physics B   影响因子和分区

1674-1056

2058-3834

Colloidal PbSe nanocrystals (NCs) have gained considerable attention due to their efficient carrier multiplication and emissions across near-infrared and short-wavelength infrared spectral ranges. However, the fast degradation of colloidal PbSe NCs in ambient conditions hampers their widespread applications in infrared optoelectronics. It is well-known that the inorganic thick-shell over core improves the stability of NCs. Here, we present the synthesis of PbSe/PbS core/shell NCs showing wide spectral tunability, in which the molar ratio of lead (Pb) and sulfur (S) precursors, and the concentration of sulfur and PbSe NCs in solvent have a significant effect on the efficient PbS shell growth. The infrared light-emitting diodes (IR-LEDs) fabricated with the PbSe/PbS core/shell NCs exhibit an external quantum efficiency (EQE) of 1.3 % at 1280 nm. The ligand exchange to optimize the distance between NCs and chloride treatment are important processes for achieving high performance on PbSe/PbS NC-LEDs. Our results provide evidence for the promising potential of PbSe/PbS NCs over the wide range of infrared optoelectronic applications.

external quantum efficiency infrared light-emitting diodes ligand exchange PbSe/PbS core/shell nanocrystal

SCI ; EI

英语

第一 ; 通讯

Distinguished Young Scholar of National Natural Science Foundation of Guangdong, China[2017B030306010]

Physics

Physics, Multidisciplinary

WOS:000508560100001

Institute of Physics Publishing

20200808187630

Chlorine compounds ; Diodes ; Efficiency ; Infrared devices ; Infrared radiation ; IV-VI semiconductors ; Ligands ; Light emitting diodes ; Molar concentration ; Molar ratio ; Nanocrystals ; Quantum efficiency ; Selenium compounds ; Sols ; Sulfur

Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Physical Chemistry:801.4 ; Chemical Products Generally:804 ; Production Engineering:913.1 ; Quantum Theory; Quantum Mechanics:931.4

2-s2.0-85079409734

Scopus

1.Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting,Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting,Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.School of Electrical and Electronic Engineering,Nanyang Technological University,Singapore
3.Shenzhen Planck Innovation Technologies Co. Ltd,Shenzhen,518112,China

Hyun，Byung Ryool,Marus，Mikita,Zhong，Huaying,et al. Infrared light-emitting diodes based on colloidal PbSe/PbS core/shell nanocrystals[J]. Chinese Physics B,2020,29(1).

Hyun，Byung Ryool.,Marus，Mikita.,Zhong，Huaying.,Li，Depeng.,Liu，Haochen.,...&Sun，Xiao Wei.(2020).Infrared light-emitting diodes based on colloidal PbSe/PbS core/shell nanocrystals.Chinese Physics B,29(1).

Hyun，Byung Ryool,et al."Infrared light-emitting diodes based on colloidal PbSe/PbS core/shell nanocrystals".Chinese Physics B 29.1(2020).