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Aluminum-Based Surface Polymerization on Carbon Dots with Aggregation-Enhanced Luminescence.

Yun Yang ZhaoBingchen HeEnshan LiuJielei LiLiming WangShi ChenYeqing ChenZhan'ao TanKar Wei NgShuang Peng WangZikang TangSongnan Qu
Published in: The journal of physical chemistry letters (2021)
Aggregation-induced luminescence quenching of carbon nanodots (CDs) is the main obstacle for their applications in solid-state light emitting devices. Herein, we developed a one-step synthesis of solid-state emissive CDs with surface aluminum-based polymerization by adding AlCl3 in citric acid and urea via a microwave-heating dehydration process. Due to the strong coordination ability of Al ions with N and O atoms, considerable steric hindrance of Al-based cross-linked polymerization was introduced on the surface of the CDs, which not only avoided aggregation of the green emissive carbon cores but also facilitated efficient energy transfer from the blue emissive polymerized surface to the green emissive carbon cores in aggregates, leading to enhanced green emissions with a photoluminescence quantum yield (PLQY) of 72.7% in the solid state.
Keyphrases
  • solid state
  • light emitting
  • quantum dots
  • energy transfer
  • molecular dynamics