Chirality-dependent concentration boundaries of single-wall carbon nanotubes for photoluminescence characterization and applications  

作　　者：Shilong Li Linhai Li Xiaojun Wei Weiya Zhou Sishen Xie Huaping Liu 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]Department of Physical Science,and Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]Beijing Key Laboratory for Advanced Functional Materials and Structure Research,Beijing 100190,China [4]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Nano Research》2023年第2期1820-1825,共6页纳米研究（英文版）

基　　金：supported by the National Key Research and Development Program of China(Nos.2020YFA0714700 and 2018YFA0208402);the National Natural Science Foundation of China(Nos.51820105002,11634014,51872320,and 52172060);the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDB33030100);the Key Research Program of Frontier Sciences,Chinese Academy of Sciences(No.QYZDBSSW-SYS028);the Youth Innovation Promotion Association of Chinese Academy of Sciences(No.2020005).

摘　　要：Increasing the concentration of single-wall carbon nanotubes(SWCNTs)is an effective method for enhancing their luminescence intensity.However,an increase in the concentration of SWCNTs would inevitably increase their reabsorption effect,degrading their luminescence efficiency.Herein,we systematically investigated variations in the photoluminescence(PL)intensity of(6,5)single-chirality SWCNTs while increasing their concentration.The results show that the PL intensity first increased to a maximum and then decreased with increasing concentration.Numerical analysis indicates that the concentration boundary corresponding to the maximum PL intensity was strongly dependent on the ratio of the optical absorbances of the SWCNTs at their excitation and emission wavelengths.According to this,statistical analysis by experimentally measuring the optical absorption spectra of 18 kinds of single-chirality SWCNTs shows that the concentration boundaries of SWCNTs were dependent upon their Types and diameters.The concentration boundary of Type I SWCNTs was higher than that of Type II SWCNTs,and the concentration boundaries of both Types increased with increasing diameter.These results provide important guidance for spectral characterization and applications in bioimaging and photoelectronic devices.

关 键 词：single-wall carbon nanotube PHOTOLUMINESCENCE concentration boundary REABSORPTION 

分 类 号：TB383[一般工业技术—材料科学与工程]