High-performance single-component white light-emitting diodes based on donor-acceptor integrated carbon nitride

IF 9.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Science China Chemistry Pub Date : 2024-11-18 DOI:10.1007/s11426-024-2339-8

Ning Wu, Fangxu Dai, Kunpeng Wang, Yunhu Wang, Xinyi Wang, Kai Zhang, Mingming Zhang, Kang Liu, Jixiang Xu, Lei Wang, Jun Xing

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Abstract

White light-emitting diodes (WLEDs) as energy-saving light sources are widely used to alleviate the rising electric consumption. Most commercial WLEDs are blue/yellow-mixed emitting devices, which have some disadvantages, such as physiological damages of rich blue light, complex device structure and color aging. It is essential to develop single-component WLEDs with quasi-solar spectrum to overcome these problems. Here we demonstrate a high-performance single-component WLED based on donor-acceptor integrated carbon nitride (DACN) material. The donor-acceptor simultaneously increases the photoluminescence efficiency and the carrier mobility of graphitic carbon nitride (g-CN), hence, the DACN-based WLED reaches a milestone in maximum luminance of 2,045 cd m⁻² and maximum external quantum efficiency of 2.2%, which are one order of magnitude higher than pristine g-CN-based LED. Furthermore, the DACN-based WLED emits broadband white light with color coordinates of (0.34, 0.44) and a color temperature of 5,163 K. Our works open a way to boost optoelectronic properties of g-CN materials and show their promising application in single-component WLEDs.

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基于供体-受体集成氮化碳的高性能单组分白光二极管

白光发光二极管（wled）作为节能光源被广泛应用，以缓解日益增长的电力消耗。商用wled多为蓝/黄混合发光器件，存在蓝光丰富的生理损伤、器件结构复杂、色老化等缺点。为了克服这些问题，必须开发具有准太阳光谱的单组分wled。在这里，我们展示了一种基于供体-受体集成氮化碳（DACN）材料的高性能单组分WLED。该给体-受体同时提高了氮化石墨碳（g-CN）的光致发光效率和载流子迁移率，因此，dcn基WLED的最大亮度达到2,045 cd m−2，最大外量子效率达到2.2%，比原始的g-CN基LED提高了一个数量级。此外，基于dann的WLED可以发射宽带白光，色坐标为（0.34,0.44），色温为5163 K。我们的工作为提高g-CN材料的光电性能开辟了一条途径，并展示了它们在单组件wled中的应用前景。

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来源期刊

Science China Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

14.40

自引率

7.30%

发文量

3787

审稿时长

2.2 months

期刊介绍： Science China Chemistry, co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China and published by Science China Press, publishes high-quality original research in both basic and applied chemistry. Indexed by Science Citation Index, it is a premier academic journal in the field. Categories of articles include: Highlights. Brief summaries and scholarly comments on recent research achievements in any field of chemistry. Perspectives. Concise reports on thelatest chemistry trends of interest to scientists worldwide, including discussions of research breakthroughs and interpretations of important science and funding policies. Reviews. In-depth summaries of representative results and achievements of the past 5–10 years in selected topics based on or closely related to the research expertise of the authors, providing a thorough assessment of the significance, current status, and future research directions of the field.