Affiliation:
1. Green Catalysis Center, and College of Chemistry Zhengzhou University Zhengzhou Henan 450000 China
2. State Key Laboratory of Superhard Materials, College of Physics Jilin University Changchun Jilin 130012 China
3. School of Chemical Sciences The University of Auckland Auckland 1142 New Zealand
Abstract
Comprehensive SummarySolid‐state fluorescent multi‐color carbon dots (SFM‐CDs), prepared using the same precursor(s) without the need for dispersion in a solid matrix, are highly demanded for a wide range of applications. Herein, we report a microwave‐assisted strategy for the preparation of SFM‐CDs with blue, yellow and red emissions within 5 min from the same precursors. The as‐prepared B‐CDs, Y‐CDs, and R‐CDs possessed bright fluorescence at 425 nm, 550 nm, and 640 nm, and photoluminescence quantum yields (PLQYs) of 54.68%, 17.93%, and 2.88%, respectively. The structure of SFM‐CDs consisted of 5‐oxo‐3,5‐dihydro‐2H‐thiazolo [3,2‐a] pyridine‐7‐carboxylic acid (TPCA) immobilized on the surface of a carbon core, with the size of the carbon core and degree of disulfide crosslinking between CDs both increasing on going from the B‐CDs to the R‐CDs, as verified by mechanochromic experiments. The excellent solid‐state fluorescence performance of the SFM‐CDs allowed their utilization as the fluorescent converter layer in multi‐color LEDs and white LEDs with a high color rendering index.
Funder
China Postdoctoral Science Foundation
National Natural Science Foundation of China
Natural Science Foundation of Henan Province
Cited by
39 articles.
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