Different C₆₀ crystals were synthesized by precipitation from a mixture of the good solvent m-xylene and the poor solvent isopropyl alcohol. The samples were characterized by scanning electron microscopy (SEM), Raman spectroscopy, thermogravimetric analysis, and high resolution transmission electron microscope (HRTEM). We found that the morphologies and sizes of the samples could be controlled by adjusting the volume ratio between the good and poor solvents. Especially, an unexpected short flower column-like crystal was synthesized at low ratios (from 1:6 to 1:12). Room temperature photoluminescence (PL) and HRTEM studies of the C₆₀ crystal samples reveal that the PL efficiency of the crystals decreases with increasing crystalline order and that the disordered C₆₀ crystals synthesized at the ratio of 1:2 show 10 times higher PL efficiency than that of pristine C₆₀. The mechanism of the growth process of these C₆₀ crystals was also studied by replacing the good solvents m-xylene with toluene and mesitylene.

通过从良溶剂间二甲苯和不良溶剂异丙醇的混合物中沉淀合成不同的C ₆₀晶体。通过扫描电子显微镜 (SEM)、拉曼光谱、热重分析和高分辨率透射电子显微镜 (HRTEM) 对样品进行表征。我们发现可以通过调整良溶剂和不良溶剂的体积比来控制样品的形貌和尺寸。特别是，以低比例（从 1:6 到 1:12）合成了意想不到的短花柱状晶体。C ₆₀晶体样品的室温光致发光 (PL) 和 HRTEM 研究表明，晶体的 PL 效率随着晶体有序度的增加而降低，并且无序的 C ₆₀以 1:2 的比例合成的晶体显示出比原始 C ₆₀高 10 倍的 PL 效率。还通过用甲苯和均三甲苯代替良溶剂间二甲苯来研究这些C ₆₀晶体的生长过程的机理。