有机芳香烃掺杂控制C_(60)微/纳米晶形貌和发光

C60高度的分子对称性使其能带间的电子跃迁被禁止,导致其发光很弱。为了提高C60纳米晶的发光强度,采用挥发C60的芳香烃饱和溶液的方法,一步合成了芳香烃溶剂化的C60纳米晶。实验结果表明,有机溶剂的掺杂在不同程度上增强了C60纳米晶的发光,其原因可能是溶剂的掺杂破坏了C60的高度的分子对称性。

Control of Morphologies and Luminescence Properties of C60 Nano/Microcrystals by The Introduction of Different Organic Solvents

The luminescence intensity of initial fullerene is very low because of its high molecular symmetry. The key point to enhance the luminescence intensity of fullerene is to lower the molecular symmetry of fullerene, which could make the forbidden bands transition allowed. Herein, C₆₀ nano/microcrystals were synthesized by the evaporation of C₆₀ saturated solution in m-xylene, 1,2,3-trichlorobenzene, 1,2,4-trichlorobenzene, and 1,3,5-trichlorobenzene. The structures of C₆₀ nanocrystals were controlled and their PL intensities were also highly enhanced by the introduction of different solvent.