无溶剂法大量制备高效红光碳点及其在白光器件中的应用  

Solvent-free and High-yielding Synthesis of Highly Efficient Red-emitting Carbon Dots and Their Application in White Light Devices

作　　者：丁辉 周旋旋 张子慧 夏坤林 赵云鹏[1] DING Hui;ZHOU Xuanxuan;ZHANG Zihui;XIA Kunlin;ZHAO Yunpeng(College of Chemical Engineering,Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education,China University of Mining andTechnology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学化工学院,煤炭加工与高效洁净利用教育部重点实验室,徐州221116

出　　处：《高等学校化学学报》2021年第6期2080-2084,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51803233)资助。

摘　　要：以邻苯二胺、2,5-二氨基苯磺酸和三氯化铝为原料,通过无溶剂法大量制备了高效的红色荧光碳点(R-CDs).制得的碳点尺寸大约为2.4 nm,含有13%的氮元素,主要由高度石墨化的碳核及覆盖在其表面的大量官能团构成.在不同的波长光激发下,碳点在乙醇溶液中表现出不依赖于激发的红光发射,其荧光峰位于704 nm,最大量子产率达到22%.由于R-CDs具有优异的光学性质,利用其构筑了紫外光激发的碳基白色发光二极管,其色坐标为(0.33,0.33),非常接近自然光.该研究为高效红色荧光碳点的大量制备提供了一种新路径,同时拓宽了其在白光器件中的应用.Highly efficient red-emitting carbon dots(R-CDs)were synthesized on a large scale by a solventfree method using o-phenylenediamine,2,5-diaminobenzene sulfonic acid and aluminum trichloride as raw materials. The obtained R-CDs are approximately 2.4 nm in diameter,have a nitrogen content of 13%,and consist of a highly graphitized carbon core coated with abundant functional groups. Under light illumination with different wavelengths,the R-CDs in ethanol solution show an excitation-independent red emission at 704 nm,with a quantum yield(QY)as high as 22%. By virtue of their excellent optical properties,an UV-excited carbon dots-based pure white light emitting diode(WLEDs)was successfully constructed with a color coordinate of(0.33,0.33),which is very close to that of natural sunlight. This study paves a new path for the large scale preparation of R-CDs with high QY,and broadens their application in luminescent devices.

关 键 词：红光碳点 无溶剂法 大量制备 白光器件 

分 类 号：O613.71[理学—无机化学]