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Highly Efficient Near-Infrared Light-Emitting Diodes Based on Chloride Treated CdTe/CdSe Type-II Quantum Dots by Feng, Huwei; Song, Jiaojiao; Song, Bin; Lin, Qingli; Shen, Huaibin; Li, Lin Song; Wang, Hongzhe; Du, Zuliang is a Engineering article available to read on EtoBox.

What is Highly Efficient Near-Infrared Light-Emitting Diodes Based on Chloride Treated CdTe/CdSe Type-II Quantum Dots about?

Quantum dot light-emitting diodes (QLEDs) have been considered as the most promising candidate of light sources for the new generation display and solid-state lighting applications. Especially, the performance of visible QLEDs based on II-VI quantum dots (QDs) has satisfied the requirements of the above applications. However, the optoelectronic properties of the corresponding near-infrared (NIR) QLEDs still lag far behind the visible ones. Here, we demonstrated the highly efficient NIR QLEDs based on chloride treated CdTe/CdSe type-II QDs. The maximum radiant emittance and peak external quantum efficiency (EQE) increased by 24.5 and 26.3%, up to 66 mW/cm^2^ and 7.2% for the corresponding devices based on the chloride treated CdTe/CdSe QDs with the PL peak located at 788 nm, respectively, compared with those of devices before chloride treatment. Remarkably, the EQE of > 5% can be sustained at the current density of 0.3–250 mA/cm^2^ after the chloride treatment. Compared with NIR LEDs based on transition metal complex, the efficiency roll-off has been suppressed to some extent for chloride treated CdTe/CdSe based NIR QLEDs. Based on the optimized conditions, the peak EQE of 7.4, 5.0,

Who reads Highly Efficient Near-Infrared Light-Emitting Diodes Based on Chloride Treated CdTe/CdSe Type-II Quantum Dots?

Author

Feng, Huwei; Song, Jiaojiao; Song, Bin; Lin, Qingli; Shen, Huaibin; Li, Lin Song; Wang, Hongzhe; Du, Zuliang

Publisher

Frontiers Media SA; Frontiers Media S.A.; Lausanne: Frontiers Media S.A., 2013- (ISSN 2296-2646)

Published

2020

Language

EN

Field

Engineering (Physical Sciences)