Surface Plasmon Enhanced Light Emission from Organic Light Emitters

nanogratings;organic light emitters;surface plasmons

Neal, Terrell Demetris ; Scherer, Axel

University:California Institute of Technology

Department:Engineering and Applied Science

关键词: nanogratings;    organic light emitters;    surface plasmons;   

Others  :  https://thesis.library.caltech.edu/3698/1/Terrell_D_Neal.pdf

美国|英语

来源: Caltech THESIS

【 摘 要 】

We have experimentally verified that visible light emission for various organic light emitters can be enhanced through the use of surface plasmon coupling layers.By matching the plasmon frequency of a thin unpatterned silver film to the emission of a dye-doped polymer deposited onto this metal surface, we have observed an 11-fold enhancement of light emission.By patterning the silver layer, we estimate that the plasmon frequency can be tuned to match dye-doped polymer emission frequencies, and even larger emission enhancements as well as extraction efficiencies are expected. Carrier dynamics of such plasmon-enhanced organic light emitters were studied and a recombination rate increase due to surface plasmon polaritons was experimentally observed.Internal quantum efficiency data from the polyfluorenes studied follow the trend supported by the time-resolved photoluminescence measurements.Also, we have presented a way to extend the lifetime of organic light emitters by reducing the photodegredation effects from photo-oxidation using surface plasmon coupling.