Surface plasmon resonance modulation toward efficient transparent perovskite light-emitting diodes†

IF 5.1 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Zi-Yi Jin, Qi Sun, Wei He, Shuang-Qiao Sun, Guang-Li Li, Yue-Min Xie and Man-Keung Fung
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Abstract

Considerable progress has been achieved in perovskite light-emitting diodes (PeLEDs) in terms of efficiency and stability. However, transparent perovskite light-emitting diodes (TPeLEDs), which are crucial for high-end display applications, suffer from compromised device performance due to various photon loss channels, particularly the surface plasmon polariton (SPP) at the organic functional layer/transparent metal electrode interface. Herein, high-refractive-index capping layers (CPLs) and self-assembled silver nanoparticles (AgNPs) are adopted as light outcoupling layers to enhance the light outcoupling efficiency of TPeLEDs. By optimizing the CPL thickness, the transmittance and SPP loss of TPeLEDs can be effectively modulated. Moreover, by carefully modulating the vacuum deposition conditions, the size and distribution of AgNPs can be optimized, resulting in further reduction in SPP loss in the devices. As a result, high-performance green TPeLEDs with an average transmittance of over 66% in the visible light range are achieved, alongside a record total external quantum efficiency (EQEtotal) of 18.6%, with bottom and top EQE values of 11.1% and 7.5%, respectively. Moreover, the incorporation of AgNPs promotes a nearly 7-fold increase in device lifetime, which further illustrates the advantages of utilizing AgNPs for fabricating high-performance TPeLEDs.

Abstract Image

面向高效透明钙钛矿发光二极管的表面等离子体共振调制
钙钛矿发光二极管(PeLEDs)在效率和稳定性方面取得了长足的进步。然而,对于高端显示应用至关重要的透明钙钛矿发光二极管(tpeld)由于各种光子损失通道,特别是有机功能层/透明金属电极界面的表面等离子激元(SPP),导致器件性能下降。本文采用高折射率封盖层(cpl)和自组装银纳米粒子(AgNPs)作为光脱耦层,提高了tpeld的光脱耦效率。通过优化CPL厚度,可以有效地调节tpeld的透光率和SPP损耗。此外,通过精心调节真空沉积条件,可以优化AgNPs的尺寸和分布,从而进一步降低器件中的SPP损耗。结果,实现了在可见光范围内平均透过率超过66%的高性能绿色tpeld,以及创纪录的总外量子效率(EQEtotal)为18.6%,EQE的下限和上限分别为11.1%和7.5%。此外,AgNPs的加入使器件寿命增加了近7倍,这进一步说明了利用AgNPs制造高性能tpeld的优势。
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来源期刊
Journal of Materials Chemistry C
Journal of Materials Chemistry C MATERIALS SCIENCE, MULTIDISCIPLINARY-PHYSICS, APPLIED
CiteScore
10.80
自引率
6.20%
发文量
1468
期刊介绍: The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study: Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability. Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine. Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive. Bioelectronics Conductors Detectors Dielectrics Displays Ferroelectrics Lasers LEDs Lighting Liquid crystals Memory Metamaterials Multiferroics Photonics Photovoltaics Semiconductors Sensors Single molecule conductors Spintronics Superconductors Thermoelectrics Topological insulators Transistors
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