Facile way to fabricate high quality white LED with yellow graphene quantum dots
Because of the fabulous fluorescence characteristics,semiconductor quantum dots have attracted a lot attention since the first reported.Meanwhile,the applications of quantum dots have been limited by its own toxicity.The appearance of graphene quantum dots(GQDs)breaks the awkward situation.GQDs can also realize from ultraviolet to near infrared full visible light broad band emitting.The lower cost,better biocompatibility and stability than semiconductor quantum dots make it possible to replace inorganic quantum dots for chemical sensing,biomarkers,and optoelectronic devices.In this paper,the synthesis of doped GQDs is mainly studied.The nitrogen-chlorine doped GQDs were synthesized by hydrothermal method.The as prepared GQDs were characterized by TEM,XPS,FTIR,PL and other characterization methods.In this study,by utilizing common industrialized technology to fabricate GQDs white LED could achieve large-scale production.The rendering index of as prepared white GQDs LED was 85.4.It is much higher than YAG phosphor white LED.And the chromaticity coordinates of GQDs LED located at(0.34,0.36).The correlated color temperature of 5075K was very consistent with indoor lighting scene.That means this GQDs white LED has great application prospects in the field of high-end lighting.
Graphene quantum dots Lighting emitting diodes High quality lighting
Jipeng Zhou Chunya Li Luqiao Yin Liang Wang Jianhua Zhang
School of Material Science and Engineering Shanghai University Shanghai,China Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai Univers Institute of Nanochemistry and Nanobiology Shanghai University Shanghai,China
国际会议
上海
英文
1598-1601
2018-08-08（万方平台首次上网日期，不代表论文的发表时间）