Influence of UV irradiation on the luminescence properties of CsPbBr3 perovskite quantum dots and CsPbBr3 perovskite quantum dots/PVDF composite film - for white LED application.

IF 2.9 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Nanotechnology Pub Date : 2024-09-25 DOI:10.1088/1361-6528/ad7f62

Kamalarasan V, Chakrawarthy Venkateswaran

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引用次数: 0

Abstract

Perovskite quantum dots (QDs) have been widely investigated for their excellent properties such as high color purity in displays, tunable emission wavelength, and high photoluminescence quantum yield. For device applications, improving the stability is an area of interest. In this study, the effects of UV irradiation on the structural and luminescence properties of CsPbBr3 perovskite quantum dots (CPB QDs) excited at 365 nm were investigated. To overcome the effects of UV irradiation, a CPB QDs/PVDF composite flexible film was prepared. It exhibits high structural and optical stability under UV irradiation and emits a highly intense green color. The emission wavelength and intensity were observed for three years, and the stability of the temperature-dependent emission intensity up to 400 K has been reported. In addition, it is stable in water. A white LED, fabricated by integrating a blue LED with CPB QDs/PVDF composite film and red phosphor, produces bright natural white light [(CIE x, CIE y) = (0.3704, 0.3611), and CCT = 4177 K] with a color gamut area coverage of 86.4% of the standard NTSC (1953) color space. .

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紫外线照射对用于白光 LED 的 CsPbBr3 包晶量子点和 CsPbBr3 包晶量子点/PVDF 复合薄膜发光特性的影响。

Perovskite 量子点（QDs）具有出色的性能，例如在显示器中具有高色彩纯度、可调发射波长和高光致发光量子产率，因此受到了广泛的研究。对于设备应用而言，提高稳定性是一个值得关注的领域。在本研究中，研究了紫外线辐照对在 365 纳米波长下激发的 CsPbBr3 包晶量子点（CPB QDs）的结构和发光特性的影响。为了克服紫外线辐照的影响，制备了一种 CPB QDs/PVDF 复合柔性薄膜。该薄膜在紫外线辐照下具有很高的结构和光学稳定性，并能发出高强度的绿色。对其发射波长和强度进行了长达三年的观测，并报告了其随温度变化的发射强度在 400 K 以下的稳定性。此外，它在水中也很稳定。通过将蓝光 LED 与 CPB QDs/PVDF 复合薄膜和红色荧光粉集成制成的白光 LED 发出明亮的自然白光[(CIE x, CIE y) = (0.3704, 0.3611), CCT = 4177 K]，色域范围覆盖标准 NTSC (1953) 色彩空间的 86.4%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nanotechnology 工程技术-材料科学：综合

CiteScore

7.10

自引率

5.70%

发文量

820

审稿时长

2.5 months

期刊介绍： The journal aims to publish papers at the forefront of nanoscale science and technology and especially those of an interdisciplinary nature. Here, nanotechnology is taken to include the ability to individually address, control, and modify structures, materials and devices with nanometre precision, and the synthesis of such structures into systems of micro- and macroscopic dimensions such as MEMS based devices. It encompasses the understanding of the fundamental physics, chemistry, biology and technology of nanometre-scale objects and how such objects can be used in the areas of computation, sensors, nanostructured materials and nano-biotechnology.