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Constructive Electroluminescence Interference for Ultra-Efficient and Narrowband Perovskite-Organic Tandem LEDs
Yu-Hang Zhang1, Yang Shen1,2, Long-Xue Cao1
1Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu, China.
Advanced Materials (Deerfield Beach, Fla.)
|July 3, 2026
Summary
We developed efficient, narrowband tandem light-emitting diodes by integrating perovskite (PeLEDs) and organic (OLEDs) components. This strategy enhances electroluminescence efficiency and color purity for next-generation displays.
Area of Science:
- Materials Science
- Optoelectronics
- Display Technology
Background:
- Tandem architectures combining perovskite light-emitting diodes (PeLEDs) and organic light-emitting diodes (OLEDs) promise advanced displays.
- Direct stacking of dissimilar electroluminescent units causes efficiency losses and spectral broadening.
Purpose of the Study:
- To achieve efficient and narrowband emission from tandem PeLED-OLED devices.
- To establish a design principle for overcoming limitations in tandem light-emitting diode efficiency and color purity.
Main Methods:
- Developed high-performance green PeLEDs via trap-state management.
- Optimized device efficiency-impedance matching for synchronous subunit operation.
- Regulated relative emission contributions for spectral overlap and superposition.
Main Results:
- Achieved synchronous operation of PeLED and OLED subunits at maximum efficiencies.
- Demonstrated constructive electroluminescence interference leading to efficiency enhancement.
- Produced tandem devices with record external quantum efficiencies (52.3% and 54.8%) and narrow spectral widths (22 nm and 24 nm FWHM).
Conclusions:
- Established a fundamental design principle for advanced tandem light-emitting diodes.
- Overcame key limitations in electroluminescence efficiency and color purity for display technologies.
- Demonstrated a viable strategy for next-generation display development using integrated PeLED-OLED systems.
