Journal
NANOMATERIALS
Volume 10, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/nano10020303
Keywords
solid-state luminescence; multi-peak emission; yellow carbon quantum dots; white light-emitting diode
Categories
Funding
- National Natural Science Foundation of China [U1710117, 51972221, 61504090]
- Natural Science Foundation of Shanxi Province [201901D111127]
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Aggregation-caused quenching (ACQ) effect, known as the main cause to restrain solid-state luminescence of carbon quantum dots (CQDs), hinders further application of CQDs in white light-emitting diodes (WLED). Here, a complex of CQDs and phthalimide crystals (CQDs/PC) was prepared through a one-step solvothermal method. CQDs/PC prevented CQDs from touching directly by embedding the CQDs in phthalimide crystal matrix in situ, which effectively reduced the ACQ effect. Furthermore, CQDs/PC exhibited multi-peak fluorescence spectra that span the green, yellow and orange spectral regions. Finally, a WLED fabricated based on CQDs/PC achieved a color-rendering index of 82 and a correlated color temperature of 5430 K. This work provides a quick and effective strategy to apply CQDs to WLED.
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