Framing emission gain layers for perovskite light-emitting diodes using polycaprolactone-silver nanoparticles featuring Förster resonance energy transfer and Purcell effects.

IF 12.2 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Zhen-Li Yan, Guan-De Wu, Chu-Chen Chueh, Ying-Chi Huang, Bi-Hsuan Lin, Jia-Hau Tsai, Mei-Hsin Chen, Zong-Liang Tseng, Ye Zhou, Ru-Jong Jeng, Chi-Ching Kuo
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Abstract

In this study, a new emission gain layer for perovskite light-emitting diodes (PeLEDs) is presented to improve their performance. The emission gain layer consisting of absorption-stable silver nanoparticles is prepared using the post-addition method of the polycaprolactone capping agent (PCL@AgNPs-P). This layer (PCL@AgNPs-P) effectively improves the Förster resonance energy transfer (FRET) between the low-n (minor) and high-n (major) phases in a quasi2D perovskite system, thereby increasing the major emission intensity and efficiency. Moreover, this layer also enhances the Purcell effect, thus increasing the spontaneous emission rates and amplifying the electroluminescence. These combined advantages enable the derived PeLED to achieve higher luminance, external quantum efficiency (EQE), and sustained emission purity. As a result, the optimized PeLED with the PCL@AgNPs-P emission gain layer delivers a maximum luminance of 11 320 cd m-2 and an EQE of 15.5%, and maintains high green wavelength emission purity and a narrow emission half-maximum width at various operating currents. Our results not only provide a robust pathway for the development of high-performance PeLEDs, but also open up the possibilities of applying PeLEDs in laser optics, where enhanced efficiency and emission characteristics are crucial for creating efficient and high-emission laser sources.

利用具有佛斯特共振能量转移和珀塞尔效应的聚己内酯-银纳米粒子,为过氧化物发光二极管构建发射增益层。
本研究提出了一种用于过氧化物发光二极管(PeLED)的新型发射增益层,以提高其性能。利用聚己内酯封端剂(PCL@AgNPs-P)的后添加方法制备了由吸收稳定的银纳米粒子组成的发射增益层。该层(PCL@AgNPs-P)可有效改善准 2D 包晶体系中低 n 相(次相)和高 n 相(主相)之间的佛斯特共振能量转移(FRET),从而提高主发射强度和效率。此外,该层还能增强珀塞尔效应,从而提高自发辐射率并放大电致发光。这些综合优势使衍生出的 PeLED 能够实现更高的亮度、外部量子效率(EQE)和持续发射纯度。因此,带有 PCL@AgNPs-P 发射增益层的优化 PeLED 可提供 11 320 cd m-2 的最大亮度和 15.5% 的 EQE,并能在各种工作电流下保持较高的绿色波长发射纯度和较窄的发射半最大宽度。我们的研究成果不仅为开发高性能 PeLED 提供了一条稳健的途径,而且为将 PeLED 应用于激光光学领域提供了可能性,因为在激光光学领域,增强的效率和发射特性对于创建高效和高发射激光源至关重要。
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来源期刊
Materials Horizons
Materials Horizons CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
18.90
自引率
2.30%
发文量
306
审稿时长
1.3 months
期刊介绍: Materials Horizons is a leading journal in materials science that focuses on publishing exceptionally high-quality and innovative research. The journal prioritizes original research that introduces new concepts or ways of thinking, rather than solely reporting technological advancements. However, groundbreaking articles featuring record-breaking material performance may also be published. To be considered for publication, the work must be of significant interest to our community-spanning readership. Starting from 2021, all articles published in Materials Horizons will be indexed in MEDLINE©. The journal publishes various types of articles, including Communications, Reviews, Opinion pieces, Focus articles, and Comments. It serves as a core journal for researchers from academia, government, and industry across all areas of materials research. Materials Horizons is a Transformative Journal and compliant with Plan S. It has an impact factor of 13.3 and is indexed in MEDLINE.
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