B,N,O-co-doped carbon dots with dual fluorescence–phosphorescence for efficient blue and white LEDs

B,N,O-CDs with dual fluorescence-phosphorescence are prepared via one-step solvothermal synthesized. The constructed blue LEDs reach 6.01 % EQE, while white LEDs achieve 4.18 % EQE, paving the way for high-performance CDs optoelectronic devices.