Xiao Wenqing, Kang Huifang, Lin Yuda, Liang Mingxing, Li Jiaxin, Huang Feng, Feng Qian, Zheng Yongping, Huang Zhigao
College of Physics and Energy, Fujian Normal University, Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials Fuzhou 350117 China
Fujian Provincial Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Xiamen University Xiamen 361005 China.
RSC Adv. 2019 Jun 11;9(32):18377-18382. doi: 10.1039/c9ra02272d. eCollection 2019 Jun 10.
The chemical modification of graphdiyne (GDY) using light elements is a possible route to regulate its unique structure and optoelectronic properties. In this paper it is shown that directly heating a mixture of xenon difluoride and GDY produces partially fluorinated GDY with covalent C-F bonding and localized sp-carbon hybridization because of the breaking of the acetylenic bond. It is seen that the fluorescence of GDY is significantly enhanced because of the fluorine doping. All the fluorinated GDYs with different doping ratios of fluorine exhibit photoluminescence from bright blue to green when the excitation wavelength varies from 260 nm to 480 nm. In addition, the doped GDY with 15.2% fluorine doping shows a strong photoluminescence and the quantum efficiency is 3.7%. The enhanced fluorescence is considered to be induced by defect states because of the doping of fluorine, suggesting its potential applications in luminescence devices, such as biological sensing and flexible light-emitting diodes.
使用轻元素对石墨炔（GDY）进行化学修饰是调节其独特结构和光电性质的一种可能途径。本文表明，直接加热二氟化氙与GDY的混合物会产生部分氟化的GDY，由于炔键的断裂，其具有共价C-F键和局域化的sp-碳杂化。可以看出，由于氟掺杂，GDY的荧光显著增强。当激发波长从260nm变化到480nm时，所有具有不同氟掺杂比例的氟化GDY都呈现出从亮蓝色到绿色的光致发光。此外，氟掺杂量为15.2%的掺杂GDY表现出强烈的光致发光，量子效率为3.7%。增强的荧光被认为是由于氟掺杂导致的缺陷态引起的，这表明其在发光器件中具有潜在应用，如生物传感和柔性发光二极管。
