Bright Multicolor Bandgap Fluorescent Carbon Quantum Dots for Electroluminescent Light‐Emitting Diodes

Abstract
Multicolor bandgap fluorescent carbon quantum dots (MCBF-CQDs) from blue to red with quantum yield up to 75% are synthesized using a solvothermal method. For the first time, monochrome electroluminescent light-emitting diodes (LEDs) with MCBF-CQDs directly as an active emission layer are fabricated. The maximum luminance of blue LEDs reaches 136 cd m−2, which is the best performance for CQD-based monochrome electroluminescent LEDs.
Funding Information
  • NSFC of China (21573019)
  • Major Research Plan of NSFC (21233003)
  • Fundamental Research Funds for the Central Universities