Enhanced Photoluminescence of Light-Emitting Polymers Coated with Metal:Energy and Charge Transfer Effect in Surface Plasmon Resonance
1.Introduction Surface plasmon (SP) is longitudinal surface charge oscillations of flee electrons that propagate along the junction between the metal and the dielectric material such as light emitting material1. As the SP energy of nanoscale metals matches with the emitted photon energy of the light emitting materials, the resulting SPR can lead to an energy and/or charge transfer from the nanometer scale metal surface to the light emitting materials or vice versa2,3. Therefore, it can introduce the increase of the number of excitons, which means the enhancement of photoluminescence (PL) intensity in nanometer scale metal-light emitting materials, which can be applied to applications in the fields of biological sensing, quantum wells or dots, light emitting diodes, etc. Here, we report on a significant enhancement in the PL intensity of a single strand of hybrid double layered nanotubes (HDLNTs) consisting of doped poly (3-methylthiophene) (P3MT) enveloped by nanoscale Ni metal, denoted as doped-P3MT/Ni. As the doping level of the P3MT nanotubes became higher, the PL intensity of the single strand of the P3MT/Ni HDLNTs increased remarkably up to～350 times. From the normalized ultraviolet and visible (UV/Vis) absorption spectra, we observed that, with increasing doping level of the P3MT nanotubes increased, the new UV/Vis absorption peaks corresponding to the SP energy of the HDLNTs of doped-P3MT nanotubes with nanoscale Ni coating increased implying a charge transfer. The enhancement of the PL of the doped-P3MT-based HDLNTs was attributed to the effects of both energy transfer and charge transfer from the bipolaron band of the doped P3MT materials in the SPR coupling.
hybrid polymer nanotube photoluminescence surface plasmon energy transfer charge transfer
Dong Hyuk Park Mi Suk Kim Eun Hei Cho Hugeun Song Dae-Chul Kim Jeongyong Kim Jinsoo Joo
Department of Physics and Hybrid Nanostructure Research Lab,Korea University,Seoul 136-713,Korea Department of Physics,University of Incheon,Incheon 402-749,Korea
国际会议
江苏镇江
英文
106-108
2008-10-15（万方平台首次上网日期，不代表论文的发表时间）