题目：

Minimizing Optical Energy Losses for Long-Lifetime Perovskite Light-Emitting Diodes

作者：

Yong-Chun Ye,^1,2 Yan-Qing Li,^2,* Xiao-Yi Cai,¹ Wei Zhou,¹ Yang Shen,¹ Kong-Chao Shen,¹ Jing-Kun Wang,¹ Xingyu Gao,³ Ivan S. Zhidkov,⁴ and Jian-Xin Tang^1,5,*

单位：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, Jiangsu, China

²School of Physics and Electronic Science, Ministry of Education Nanophotonics and Advanced Instrument, Engineering Research Center, East China Normal University, Shanghai 200241, China

³Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics, and Shanghai Synchrotron Radiation Facility Zhangjiang Laboratory, Chinese Academy of Sciences

Shanghai, 201204, China

⁴Institute of Physics and Technology, Ural Federal University, Mira 19 str., 620002, Yekaterinburg, Russia

⁵Macao Institute of Materials Science and Engineering (MIMSE), Macau University of Science and Technology, Taipa 999078, Macau SAR, China

摘要：

Regardless of the rapid advance on perovskite light-emitting diodes (PeLEDs), the lack of long-term operational stability hinders the practicality of this technology. Particularly, thermal management is indispensable to control the Joule heating induced by charge transport and parasitic re-absorption of internally confined photons. Herein, a synergetic device architecture is proposed for minimizing the optical energy losses in PeLEDs toward high efficiency and long lifetime. By adopting a carefully modified perovskite emitter in combination with an improved light outcoupling structure, red PeLEDs emitting at 666 nm achieve a peak external quantum efficiency of 21.2% and an operational half-lifetime of 4806.7 h for an initial luminance of 100 cd m^-2. The enhanced light extraction from trapped modes can efficiently reduce the driving current and suppress optical energy losses in PeLEDs, which in turn ameliorate the heat-induced device degradation during operation. This work paves the way toward high-performance PeLEDs for display and lighting applications in the future.

影响因子：

16.836

分区情况：

一区

链接：

https://onlinelibrary.wiley.com/doi/10.1002/adfm.202105813