将多色碳量子点直接掺入具有可调相关色温的白色发光二极管的荧光膜中<a href="#fn1" title="现有电子补充信息（ESI）：多色CQD的光学特性和结构表征，以及WLED的示意图和光学特性，图S1-S11和表S1-S4。参见DOI：10.1039 / c8tc04887h">†</a>,Journal of Materials Chemistry C

当前位置： X-MOL 学术 › J. Mater. Chem. C › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

将多色碳量子点直接掺入具有可调相关色温的白色发光二极管的荧光膜中 †
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2018-12-13 00:00:00 , DOI: 10.1039/c8tc04887h
Yuanfei Ding _{1,

2,

3,

4,

5} , Jingxia Zheng _{1,

2,

3,

4,

5} , Junli Wang _{1,

2,

3,

4,

5} , Yongzhen Yang _{1,

2,

3,

4,

5} , Xuguang Liu _{1,

2,

3,

4,

6}

Affiliation

具有高显色指数（CRI）和可调节的相关色温（CCT）的白光发光二极管（WLED）在广泛的领域中非常重要。我们报告了一种通过结合多色碳量子点（CQDs）来制造具有显着CCT性能的WLED的有效方法。通过邻苯二甲酸与邻苯二甲酸之间的一锅溶剂热反应获得具有绿色，黄色和橙色发射光的长波长CQD（分别表示为G-，Y-和O-CQD）。-苯二胺，然后通过硅胶柱色谱法精确分离。系统研究和详细表征表明，G-和Y-CQD的发射主要是由于量子尺寸效应，而O-CQD的光致发光发射主要来自于表面氧化形成的表面缺陷状态。随后，通过使用发射三官能蓝的CQD（荧光剂，分散剂和固化剂）获得的固态发光红绿蓝CQD薄膜导致了具有良好色彩稳定性和高CRI（83-88）的紫外线泵浦WLED。以及可调CCT（3466–7368 K）。这项工作为开发低成本，环保和高性能基于CQD荧光粉的WLED开辟了新途径。

"点击查看英文标题和摘要"

Direct blending of multicolor carbon quantum dots into fluorescent films for white light emitting diodes with an adjustable correlated color temperature†

White light-emitting diodes (WLEDs) with a high color rendering index (CRI) and an adjustable correlated color temperature (CCT) are of great importance in a wide range of fields. We report an efficient method to fabricate WLEDs with prominent CCT performance by the combination of multi-colour carbon quantum dots (CQDs). Long-wavelength CQDs with green, yellow and orange emission (denoted as G-, Y-, and O-CQDs, respectively) were obtained by a one-pot solvothermal reaction between phthalic acid and o-phenylenediamine followed by precise separation by silica column chromatography. Systematic investigation and detailed characterization demonstrate that G- and Y-CQDs emit mainly due to the quantum size effect, while the photoluminescence emission of O-CQDs is mainly derived from surface defect states formed by surface oxidation. Subsequently, solid-state luminous red-green-blue CQD films obtained by using tri-functional blue emitting CQDs (phosphors, dispersants and curing agents) lead to UV-pumped WLEDs with good color stability and a high CRI (83–88) as well as an adjustable CCT (3466–7368 K). This work has opened up new avenues for the development of low-cost, environmentally-friendly and high-performance CQD phosphor-based WLEDs.

更新日期：2018-12-13

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南