The origins of the broadband photoluminescence from carbon nitrides and applications to white light emitting
The origins of the broadband photoluminescence from carbon nitrides and applications to white light emitting作者机构：Key Laboratory of Optoelectronic Technology of Jiangsu Province School of Physical Science and Technology Nanjing Normal University Nanjing 210023 China Key Laboratory of Modern Acoustics MOE Institute of Acoustics Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 China School of Environmental Science Nanjing Xiaozhuang University Nanjing 211171 China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2016年第9卷第6期
页 面：1801-1812页
核心收录：
学科分类：0810[工学-信息与通信工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 081001[工学-通信与信息系统]
基 金：Partial support was also from China Postdoctoral Science Foundation 国家自然科学基金 supported by National Basic Research Programs of China
主 题：photoluminescence carbon nitrides thermal polycondensation white light emission
摘 要：Carbon nitrides synthesized by thermal polycondensation of melamine at 700 ~C exhibit photoluminescence （PL） ranging from 400 to 650 nm. This broad PL is attributed to band to band transitions and bandtail transitions of lone pair （LP） states of intra-tri-s-triazine and inter-tri-s-triazine nitrogens. The proposed PL mechanism is further confirmed by diffusion reflectance spectroscopy, as well as time-resolved and temperature-dependent PL. This intense fluorescence is stable at different pH and resistant to UV exposure, suggesting that this inexpensive broadband luminescent material could be significant for white- light-emitting （WLE） applications. Thus, quasi-WLE films and membranes with designed patterns are fabricated by embedding the carbon nitrides into polymethyl methacrylate. Moreover, even broader PL （400 to 740 nm） is acquired in com- posite films composed of carbon nitrides, further suggesting that the carbon nitrides are robust candidates for WLE.
维普期刊数据库