• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Solvatochromism of bright carbon dots with tunable long-wavelength emission from green to red and their application as solid-state materials for warm WLEDs
【24h】

Solvatochromism of bright carbon dots with tunable long-wavelength emission from green to red and their application as solid-state materials for warm WLEDs

机译：明亮的碳点的溶色溶色度，绿色与红色的可调长波长发射及其作为固态材料的温暖WLED

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Herein, we present a facile approach to produce long-wavelength emitting carbon dots (CDs). A shift of the fluorescence emission wavelength of CDs from 630 nm to 520 nm can be easily acquired. The assynthesized CDs exhibit concentration-dependent PL property as well as the "solvatochromism" phenomenon, which are rarely known in CDs. As the concentration or solvent polarity of the CDs increases, the photoluminescence (PL) wavelength exhibits a red shift. More importantly, the QY of these long-wavelength CDs is as high as 52.4%, which is considerably higher than that mentioned in other reports. Moreover, on addition of an acid (HCl), the surface H+-functionalization on the CDs leads to strong quenching of fluorescence emission, which is almost reversible after the addition of a strong base (NaOH). Then, CDs based solid-state composites were fabricated using a combination of polyvinyl butyral (PVB) and CDs. Finally, CDs/PVB composites were deposited on the Ce3+:Y3Al5O12 (Ce3+: YAG) phosphor-in-glass (Ce-PiG) via a screen-printing technology. Warm white light-emitting diodes (WLEDs) were then fabricated using these materials and GaN chips. The results indicate that these CDs possess a potential for future applications in warm WLEDs.
机译：这里，我们介绍了产生长波长发射碳点（CD）的容易方法。可以容易地获得从630nm至520nm的Cds的荧光发射波长的偏移。 Bassynthesized CDS表现出浓度依赖性PL性能以及“溶剂溶解度”现象，其在Cds中很少已知。随着CD的浓度或溶剂极性增加，光致发光（PL）波长表现出红移。更重要的是，这些长波长CD的Qy高达52.4％，其比其他报告中提到的高达52.4％。此外，在添加酸（HCl）中，CDS上的表面H + - 官能化导致荧光发射的强烈猝灭，在添加强碱（NaOH）后几乎可逆。然后，使用聚乙烯基缩丁（PVB）和Cds的组合制造Cds的固态复合材料。最后，通过丝网印刷技术沉积在Ce3 +：Y3Al5O12（Ce3 +：YAG）磷光体（CE-PIG）上沉积CDS / PVB复合材料。然后使用这些材料和GaN芯片制造温暖的白色发光二极管（WLED）。结果表明，这些CD具有未来应用在温暖的潮流中的潜力。

著录项

  • 来源
    《RSC Advances》 |2017年第66期|共9页
  • 作者

    Lin Sai; Lin Chun; He Meiling; Yuan Rongrong; Zhang Yijun; Zhou Yongqiang; Xiang Weidong; Liang Xiaojuan;

  • 作者单位

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Peoples R China;

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Peoples R China;

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Peoples R China;

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Peoples R China;

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Peoples R China;

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Peoples R China;

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Peoples R China;

    Wenzhou Univ Coll Chem &

    Mat Engn Wenzhou 325035 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号