Excitation-Independent Dual-Color Carbon Dots: Surface-State Controlling and Solid-State Lighting

被引:106
作者
Chen, Daqin [1 ]
Gao, Haobo [1 ]
Chen, Xiao [1 ]
Fang, Gaoliang [1 ]
Yuan, Shuo [1 ]
Yuan, Yongjun [1 ]
机构
[1] Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou 310018, Zhejiang, Peoples R China
基金
中国国家自然科学基金;
关键词
luminescence; quantum dots; optical materials; light-emitting diodes; carbon film; display; GRAPHENE QUANTUM DOTS; EMISSION; NANODOTS; PHOTOLUMINESCENCE; LUMINESCENCE; PHOSPHORS; NITROGEN;
D O I
10.1021/acsphotonics.7b00675
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Long-wavelength orange-red emissions of carbon dots have recently attracted great attention due to their wide applications. Although it is possible to achieve long-wavelength luminescence by varying the incident excitation wavelength, excitation-independency is highly desired in terms of both practical applications and understanding emission mechanisms. In the present work, carbon dots with excitation wavelength independent orange and blue dual-color emissions were synthesized by a facile solvothermal route using p-phenylenediamine as carbon source and formamide as solvent. Structural and spectroscopic characterizations indicated that N- and O-related surface state controlling via modifying reacting temperature/time was responsible for the dual-color emissions of carbon dots. Moreover, carbon solid film, retaining original orange emissions, was fabricated to explore its possible application as color converter in solid-state lighting. Impressively, by combining orange carbon film and yellow phosphor-in-glass with an InGaN blue chip, light-emitting diode devices with improved color-rendering index and correlated color temperature were successfully constructed.
引用
收藏
页码:2352 / 2358
页数:7
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