High-Performance Quantum Dot Light-Emitting Diodes With Self-Assembled Bilayer Light Extraction Structure

IF 4.1 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Electron Device Letters Pub Date : 2025-01-20 DOI:10.1109/LED.2025.3531377

Leilei Cui;Chao Zhong;Hailong Hu;Tailiang Guo;Fushan Li

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引用次数: 0

Abstract

Quantum dot photodiodes (QLEDs) hold promising potential for next-generation display and lighting devices due to their high emission efficiency, high color purity in the visible region, tunability of emission wavelengths, and low manufacturing costs. However, QLEDs confine a large number of photons inside the device that cannot be utilized, leading to low external quantum efficiency. In this paper, a simple and efficient strategy to construct bilayer light extraction structures is developed based on the self-assembled polystyrene (PS) microspheres embedded in polyvinyl butyral (PVB) film with excellent thermoplasticity. The maximum external quantum efficiency (EQE) of blue-QLED, green-QLED and red-QLED increased from 8.18% to 13.51%, 12.96% to 19.61% and 21.7% to 25%, respectively. It is found that bilayer light extraction structure does not change the light intensity angular distribution of Lambertian emission mode. The bilayer optically coupled structure proposed in this work provides an efficient and stable way for the improvement of QLED performance.

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来源期刊

IEEE Electron Device Letters 工程技术-工程：电子与电气

CiteScore

8.20

自引率

10.20%

发文量

551

审稿时长

1.4 months

期刊介绍： IEEE Electron Device Letters publishes original and significant contributions relating to the theory, modeling, design, performance and reliability of electron and ion integrated circuit devices and interconnects, involving insulators, metals, organic materials, micro-plasmas, semiconductors, quantum-effect structures, vacuum devices, and emerging materials with applications in bioelectronics, biomedical electronics, computation, communications, displays, microelectromechanics, imaging, micro-actuators, nanoelectronics, optoelectronics, photovoltaics, power ICs and micro-sensors.