Enhancing White Light-Emitting Diode Performance with Ultra-Wide Spectrum ZnS:Mn-CDs@SiO2 Dual Core@Shell Composite

IF 6.1 1区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Frontiers Pub Date : 2024-11-26 DOI:10.1039/d4qi01099j

Yuanhui Zheng, Haijiang Qiu, Song Yang, Min Li, Haixin Chen, Yongqi Zhang, Xin Chen

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Abstract

Recent progress in the field of carbon dots (CDs) has highlighted their significant potential, attributed to their exceptional optical properties and diverse applications, most notably in the realm of white light-emitting diodes (WLEDs). CDs are recognized for their broad spectrum of emission, adjustable fluorescence, and excellent thermal stability, making them ideal candidates for use in WLEDs. However, the challenge lies in synthesizing CDs that can emit long-wavelength, multicolor light from a single host material. This research presents a highly efficient dual-core-shell structured white-emitting phosphor, denoted as ZnS:Mn-CDs@SiO2, which has achieved an impressive photoluminescence quantum yield (PLQY) of 25.8% and an expansive full width at half maximum (FWHM) of 131 nm. The successful implementation of this novel material has led to the creation of WLEDs with Commission Internationale de l'Eclairage (CIE) coordinates at (0.32, 0.38) and a correlated color temperature (CCT) of 5856 K, marking a significant stride in the development of high-performance WLEDs.

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利用超宽光谱 ZnS:Mn-CDs@SiO2 双核@壳复合材料提高白光发光二极管的性能

碳点（CD）因其卓越的光学特性和多样化的应用，尤其是在白光发光二极管（WLED）领域的应用，最近在该领域取得的进展凸显了其巨大潜力。碳纳米管具有宽光谱发射、可调荧光和出色的热稳定性，是 WLED 的理想候选材料。然而，如何合成能从单一宿主材料发出长波长、多色光的光盘是一项挑战。这项研究提出了一种高效的双核壳结构白光发光荧光粉，命名为 ZnS:Mn-CDs@SiO2，其光致发光量子产率（PLQY）达到了令人印象深刻的 25.8%，半最大全宽（FWHM）为 131 nm。这种新型材料的成功应用，使得国际照明委员会（CIE）坐标为（0.32, 0.38）、相关色温（CCT）为 5856 K 的无卤素发光二极管得以问世，标志着高性能无卤素发光二极管的发展迈出了重要一步。

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