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Updated: Jun 14, 2025

Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications
Published on: June 2, 2017
Large Enhancement of Photoluminescence Obtained in Thin Polyfluorene Films of Optimized Microstructure
Otto Todor-Boer1, Cosmin Farcău2,3, Ioan Botiz3,4
1Research Institute for Analytical Instrumentation Subsidiary, National Institute for Research and Development of Optoelectronics Bucharest INOE 2000, 67 Donath Street, 400293 Cluj-Napoca, Romania.
Abstract:
There is a clearly demonstrated relationship between the microstructure, processing and resulting optoelectronic properties of conjugated polymers. Here, we exploited this relationship by exposing polyfluorene thin films to various solvent vapors via confined-solvent vapor annealing to optimize their microstructure, with the final goal being to enhance their emission properties. Our results have demonstrated enlargements in photoluminescence intensity of up to 270%, 258% and 240% when thin films of polyfluorenes of average molecular weights of 105,491 g/mol, 63,114 g/mol and 14,000 g/mol, respectively, experienced increases in their β-phase fractions upon processing.
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