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实验采用前驱体法合成了BCNO发光材料,该发光材料的发射光在蓝光到绿光之间可调,发光性能优良。通过对BCNO发光材料进行X射线衍射分析,发现BCNO发光材料主要成分是B_2O_3、BN和石墨化碳。通过对BCNO发光材料进行透射电镜分析,发现BCNO发光材料是纳米晶体结构,其晶格条纹间距为0.34nm。通过对BCNO发光材料进行光谱分析,发现BCNO发光材料发射波长随激发波长增大而红移。综合上述分析发现,BCNO材料发光很可能源自碳取代h-BN中B或者N的格位而聚集在一起形成碳量子点发光。
The BCNO luminescent material was synthesized by the precursor method. The emission of the luminescent material is adjustable between blue and green light, and its luminescent properties are excellent. By X-ray diffraction analysis of the BCNO luminescent material, it was found that the main components of the BCNO luminescent material are B 2 O 3, BN and graphitized carbon. Through the transmission electron microscopy analysis of the BCNO luminescent material, it was found that the BCNO luminescent material has a nanocrystalline structure with a lattice spacing of 0.34 nm. By analyzing the BCNO luminescent material, it was found that the emission wavelength of BCNO luminescent material red-shifted with increasing excitation wavelength. Based on the above analysis, it is found that the luminescence of BCNO is likely to originate from the carbon substitution of the lattice sites of B or N in h-BN to form carbon quantum dots to emit light.