globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2020.08.025
论文题名:
Perovskite QLED with an external quantum efficiency of over 21% by modulating electronic transport
作者: Fang T.; Wang T.; Li X.; Dong Y.; Bai S.; Song J.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期:1
起始页码: 36
结束页码: 43
语种: 英语
中文关键词: Charge balance ; Electron transport ; Light-emitting diodes ; Perovskite ; Quantum dots
英文关键词: Balancing ; Display devices ; Efficiency ; Electron transport properties ; Organic light emitting diodes (OLED) ; Perovskite ; Quantum chemistry ; Semiconductor quantum dots ; Charge accumulation ; Electronic transport ; External quantum efficiency ; High definition display ; Low turn-on voltages ; Luminescence quenching ; Operational lifetime ; Solid state lighting ; Quantum efficiency
英文摘要: Perovskite quantum-dot-based light-emitting diodes (QLEDs) are highly promising for future solid-state lightings and high-definition displays due to their excellent color purity. However, their device performance is easily affected by charge accumulation induced luminescence quenching due to imbalanced charge injection in the devices. Here we report green perovskite QLEDs with simultaneously improved efficiency and operational lifetime through balancing the charge injection with the employment of a bilayered electron transport structure. The charge-balanced QLEDs exhibit a color-saturated green emission with a full-width at half-maximum (FWHM) of 18 nm and a peak at 520 nm, a low turn-on voltage of 2.0 V and a champion external quantum efficiency (EQE) of 21.63%, representing one of the most efficient perovskite QLEDs so far. In addition, the devices with modulated charge balance demonstrate a nearly 20-fold improvement in the operational lifetime compared to the control device. Our results demonstrate the great potential of further improving the device performance of perovskite QLEDs toward practical applications in lightings and displays via rational device engineering. © 2020 Science China Press
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170240
Appears in Collections:气候变化与战略

Files in This Item:

There are no files associated with this item.


作者单位: School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China; MIIT Key Laboratory of Advanced Display Materials and Devices, Institute of Optoelectronics & Nanomaterials, Nanjing, 210094, China; Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, 58183, Sweden

Recommended Citation:
Fang T.,Wang T.,Li X.,et al. Perovskite QLED with an external quantum efficiency of over 21% by modulating electronic transport[J]. Science Bulletin,2021-01-01,66(1)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Fang T.]'s Articles
[Wang T.]'s Articles
[Li X.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Fang T.]'s Articles
[Wang T.]'s Articles
[Li X.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Fang T.]‘s Articles
[Wang T.]‘s Articles
[Li X.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.