Constructive Electroluminescence Interference for Ultra‐Efficient and Narrowband Perovskite‐Organic Tandem LEDs
Abstract
ABSTRACT The integration of solution‐processed perovskite light‐emitting diodes (PeLEDs) with vacuum‐deposited organic light‐emitting diodes (OLEDs) in tandem architectures offers a promising pathway toward next‐generation displays. However, directly stacking electroluminescent units with dissimilar optoelectronic characteristics often results in electroluminescence losses and spectral broadening. To achieve efficient and narrowband tandem emission, we first develop high‐performance green PeLEDs as the bottom subunit through rational trap‐state management. By precisely optimizing device efficiency‐impedance matching, we realize synchronous operation of the PeLED and OLED subunits at their respective maximum efficiencies, producing constructive electroluminescence interference and yielding significant efficiency enhancement. Moreover, delicate regulation of the relative emission contributions ensures optimal spectral overlap and superposition, leading to markedly strengthened narrowband output. Using this strategy, tandem devices integrating PeLEDs with two representative OLEDs deliver record‐breaking external quantum efficiencies of 52.3% and 54.8%, with narrow full widths at half maximum of 22 and 24 nm, respectively. This work establishes a fundamental design principle for tandem light‐emitting diodes that simultaneously overcome limitations in EL efficiency and color purity in advanced display technologies.
Article Details
Authors (10)
Yu‐Hang Zhang
State Key Laboratory For Physical Chemistry of Solid Surfaces Innovation Laboratory for Sciences and Technologies of Energy Material of Fujian Province (IKKEM) Collaborative Innovation Center of Chemistry for Energy Materials (<i>i</i>ChEM) Engineering Research Center of Electrochemical Technologies of Ministry of Education, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University Xiamen Fujian China
Yang Shen
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics
Long‐Xue Cao
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Soochow University Suzhou 215123 China
Shi‐Chi Feng
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Soochow University Suzhou 215123 China
Xin‐Mei Hu
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Soochow University Suzhou 215123 China
Ying‐Ying Li
Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou Jiangsu China
Jun‐Yu Liu
Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon‐Based Functional Materials & Devices Soochow University Suzhou 215123 China
Song‐Shan Zeng
Macao Institute of Materials Science and Engineering (MIMSE) Sino‐Luso Joint Laboratory For Optoelectronics Macau University of Science and Technology Taipa Macao China
Yan‐Qing Li
School of Physics East China Normal University Shanghai P. R. China
Jian‐Xin Tang
Jiangsu Key Laboratory For Carbon‐Based Functional Materials & Devices Institute of Functional Nano & Soft Materials (FUNSOM) Soochow University Suzhou Jiangsu P. R. China