A Simple Device-To-Device Transform for White Light-Emitting Diode with Monochromatic Carbon Dots,Advanced Optical Materials

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A Simple Device-To-Device Transform for White Light-Emitting Diode with Monochromatic Carbon Dots
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2023-09-17 , DOI: 10.1002/adom.202301651
Tianyang Zhang ₁ , Jian Shen ₁ , Wan‐ Shan Shen ₁ , Zhenglong Fan ₁ , Kai Yu ₁ , Yingming Wang ₁ , Honglin Si ₁ , Hui Huang ₁ , Yang Liu ₁ , Liang‐Sheng Liao ₁ , Zhenhui Kang _{1,

2}

Affiliation

Currently, the fabrication of white light emitting diodes (WLEDs) strongly depends on white fluorescent emission materials. The conventional method, which is a direct way from the designed fluorescent emission material to the device, is regarded as a fundamental principle in this field. Here, a brand-new approach is shown for the design of WLEDs with a simple device-to-device transform based on monochromatic carbon dots (CDs). In this work, the WLEDs based on the blue fluorescent CDs achieve the in situ generation of bright white light emission in the device, originating from the oxidation of functional groups involving S element in CDs caused by strong electrical treatment. These CDs-based WLEDs possess the luminance of 533 cd m⁻², Commission Internationale d'Eclairage coordinates located at (0.38, 0.38), a correlated color temperature of 4072 K, and a color render index up to 95. This work opens a brand-new gate for achieving high-purity and bright WLEDs through the strategy of transforming from device to device rather than material to device.

中文翻译：

具有单色碳点的白色发光二极管的简单器件到器件转换

目前，白光发光二极管（WLED）的制造很大程度上依赖于白色荧光发射材料。传统方法是从设计的荧光发射材料到器件的直接方法，被认为是该领域的基本原理。这里展示了一种全新的 WLED 设计方法，具有基于单色碳点 (CD) 的简单器件到器件转换。在这项工作中，基于蓝色荧光CD的WLED在器件中实现了原位产生明亮的白光发射，这源于强电处理导致CD中涉及S元素的官能团的氧化。这些基于 CD 的 WLED 的亮度为 533 cd m ⁻²，国际照明委员会坐标位于 (0.38, 0.38)，相关色温为 4072 K，显色指数高达 95。这项工作开启了通过从器件到器件而非材料到器件的转变策略，实现高纯度、高亮度WLED的全新大门。

更新日期：2023-09-17

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