Controllable preparation and disorder-dependent photoluminescence of morphologically different C_(60) microcrystals

作     者：Wen Cui De-Jun Li Jin-Liang Guo Lang-Huan Zhao Bing-Bing Liu Shi-Shuai Sun 崔雯;李德军;郭金良;赵琅嬛;刘冰冰;孙士帅

作者机构：College of Physics and Materials ScienceTianjin Normal UniversityTianjin 300387China State Key Laboratory of Superhard MaterialsJilin UniversityChangchun 130012China College of ScienceTianjin University of TechnologyTianjin 300384China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2021年第30卷第8期

页      面：433-439页

核心收录：

学科分类：08[工学] 0803[工学-光学工程] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11504269 and 11504267) Tianjin Natural Science Foundation(Grant No.20JCQNJC00660)the Program for Innovative Research in University of Tianjin(Grant No.TD13-5077) 

主　　题：C_(60)crystals morphology photoluminescence growth process 

摘      要：Different C_(60) crystals were synthesized by precipitation from a mixture of the good solvent m-xylene and the poor solvent isopropyl *** 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 ***,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 C_(60) crystal samples reveal that the PL efficiency of the crystals decreases with increasing crystalline order and that the disordered C_(60) crystals synthesized at the ratio of 1:2 show 10 times higher PL efficiency than that of pristine C_(60).The mechanism of the growth process of these C_(60) crystals was also studied by replacing the good solvents m-xylene with toluene and mesitylene.