Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 13, Issue 25, Pages 30098-30105Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c07444
Keywords
carbonized polymer dots; multicolor; unconjugated precursor; LEDs; high color rendering index
Funding
- National Natural Science Foundation of China [21905253, 51973200]
- Chinese Postdoctoral Science Foundation [2018M640681, 2019T120632]
- Natural Science Foundation of Henan [202300410372]
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This study successfully synthesizes multicolor fluorescent CPDs from a single unconjugated precursor, glucose, through a hydrothermal reaction, allowing for tunable emission wavelength and construction of LEDs in different colors, including white light-emitting diodes.
Tunable emission carbonized polymer dots (CPDs) are highly desirable for the preparation of optoelectronic devices, especially white light-emitting diodes (WLEDs). In most available studies, polychromatic CPDs are synthesized using aromatic molecules as precursors. However, few studies report the successful synthesis of polychromatic CPDs using two or more unconjugated precursors. In this work, we prepare multicolor fluorescent CPDs from a single unconjugated precursor, glucose, via a hydrothermal reaction. By controlling the particle size and degree of graphitization of the synthesized CPDs, their emission wavelength can be tuned in the range 440-625 nm (i.e., almost the entire visible region). Furthermore, the CPDs can be used to construct LEDs of varying colors, including WLEDs (CIE coordinates: 0.34, 0.36) with the correlated color temperature and color rendering index of 4997 K and 92.69, respectively. In brief, the strategy proposed in this study successfully converts unconjugated glucose into high-performance LEDs with great application potential.
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