Planar oxygen-doped carbon quantum rings (OD-CQRs) are prepared through one-pot solid-state reactions. The synthesized OD-CQRs exhibit a fluorescence peak centre at 393 nm, a full-width at half-maximum of 18 nm and a photoluminescence quantum yield of 95%. Electroluminescent light emitting diodes based on OD-CQRs demonstrate high-colour-purity violet emission.
- Xianzhi Song
- Chen Zhang
- Louzhen Fan
