起源
荧光
有色的
碳纤维
材料科学
纳米技术
计算机科学
物理
电信
光学
复合数
复合材料
作者
Yeqing Chen,Hongzhou Lian,Yi Wei,Xin He,Yan Chen,Bo Wang,Qingguang Zeng,Jun Lin
出处
期刊:Nanoscale
[Royal Society of Chemistry]
日期:2018-01-01
卷期号:10 (14): 6734-6743
被引量:269
摘要
Color-tunable carbon dots have been synthesized via a one pot hydrothermal synthesis and re-dispersed in dimethylformamide solution after purification. Structural and optical property characterizations indicate that the concentration-dependent photoluminescent properties can be ascribed to the existence of multi-emissive centers in the carbon dots from core states, edge states and surface states. Therefore, a multi-center fluorescent mechanism for the carbon dots has been proposed according to the preservation effect and inductive effect of the solvent. The emission wavelength of the carbon dots with different concentrations can be tuned from 585 to 514 nm under the fixed excitation of 420 nm blue light, and a warm white light-emitting diode with a CIE color coordinate at (0.42, 0.35) is fabricated on a InGaN blue chip emitting 420 nm blue light.
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