Excitation-Independent Dual-Color Carbon Dots: Surface-State
Controlling and Solid-State Lighting
Version 3 2018-02-09, 23:33
Version 2 2017-10-17, 18:18
Version 1 2017-08-22, 21:49
Posted on 2018-02-09 - 23:33
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.
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Chen, Daqin; Gao, Haobo; Chen, Xiao; Fang, Gaoliang; Yuan, Shuo; Yuan, Yongjun (2017). Excitation-Independent Dual-Color Carbon Dots: Surface-State
Controlling and Solid-State Lighting. ACS Publications. Collection. https://doi.org/10.1021/acsphotonics.7b00675
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AUTHORS (6)
DC
Daqin Chen
HG
Haobo Gao
XC
Xiao Chen
GF
Gaoliang Fang
SY
Shuo Yuan
YY
Yongjun Yuan