Arginine-Mediated Buried-Interface Regulation Enables Highly Efficient and Air-Processed Green Perovskite Light-Emitting Diodes

August 2, 2026

ACS Publications Unknown

Overview

An interface engineering strategy utilizing l-arginine (l-Arg) modified PEDOT:PSS as a hole transport layer has been reported to effectively tailor the nucleation behavior of air-processed FAPbBr3 perovskite films. This technique generates high-density, high-quality films, resulting in high-performance green perovskite light-emitting diodes (PeLEDs) with a peak luminance of 47,100 cd m–2, a current efficiency of 24.9 cd A–1, and a peak external quantum efficiency of 6.62%. Furthermore, the operational stability of these devices is significantly improved, marking a major advance in air-processed PeLED manufacturing.

In Depth

Key Findings

An innovative interface engineering strategy, employing l-arginine (l-Arg) modified PEDOT:PSS as a hole transport layer, has been developed to dramatically improve the quality of air-processed FAPbBr3 perovskite films. This technique facilitates the formation of high-density, uniform perovskite films, leading to the realization of one of the highest-performing green perovskite light-emitting diodes (PeLEDs reported to date, with a peak luminance of 47,100 cd m–2, a current efficiency of 24.9 cd A–1, and a peak external quantum efficiency of 6.62%. Crucially, these devices also demonstrate significantly enhanced operational stability, a vital metric for commercial viability.

Technical / Clinical Details

Perovskite light-emitting diodes (PeLEDs) are highly anticipated for next-generation display technologies due to their high color purity and wide color gamut. However, achieving high performance and stability hinges on optimizing both the perovskite film quality and interfacial properties. This research adopts a straightforward approach: introducing l-arginine into PEDOT:PSS, a widely used hole transport layer. L-arginine, an amino acid, modifies the surface properties of PEDOT:PSS, allowing for precise control over the nucleation behavior of the FAPbBr3 perovskite precursor solution deposited on it. This controlled nucleation facilitates the formation of more uniform, defect-free, and high-density perovskite crystalline films under ambient air conditions. The result is improved light extraction efficiency and suppressed non-radiative recombination, leading to substantial enhancements in key performance indicators such as peak luminance, current efficiency, and external quantum efficiency (EQE). The achievement of high performance via an air-processing route is particularly significant, directly translating to substantial reductions in manufacturing costs and improvements in scalability.

Background & Context

Traditional organic light-emitting diode (OLED) displays, despite their superior visual characteristics, still face challenges in terms of cost, stability, and luminescence efficiency. Perovskite light-emitting diodes are rapidly advancing as a technology with the potential to overcome these limitations. However, air-processing of perovskite materials has been problematic due to their inherent vulnerability to moisture, leading to performance degradation. The l-arginine-mediated interface control presented in this study addresses this air-processing challenge, offering a crucial pathway for manufacturing high-performance PeLEDs more affordably and at scale. This breakthrough is set to accelerate the application of perovskite technology in diverse fields, including next-generation displays, lighting, and even bio-imaging.

Strategic Significance & Outlook

The l-arginine-mediated buried-interface regulation technique is highly promising for improving the performance and air stability of green PeLEDs. Future research will likely focus on extending this approach to blue and red PeLEDs to achieve full-color display capabilities. Further efforts will also concentrate on large-area fabrication, validating long-term durability, and streamlining manufacturing processes for cost reduction. The realization of high-performance PeLEDs through air-processing could drive the creation of innovative products such as flexible displays, wearable devices, and IoT lighting, potentially ushering in a major transformation for the display industry.

Source: https://pubs.acs.org/doi/10.1021/acs.nanolett.6b01010

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