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5 August 2021 Detection, identification, and analysis of multi-emitter polymer systems
Stephanie N. Kramer, Linda A. Peteanu
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Proceedings Volume 11799, Physical Chemistry of Semiconductor Materials and Interfaces XX; 1179913 (2021) https://doi.org/10.1117/12.2594251
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
Abstract
While fluorescent conjugated polymers are seeing increased use in optoelectronics, aggregation remains a roadblock due to emission quenching. It is therefore important to more fully understand the conditions that drive the emissive behavior. To properly interpret the spectral changes of P3HT from solvent poisoning, we employed a variety of single-molecule fluorescence techniques. In general, is impossible to assign spectral features in bulk emission spectra to the monomer versus aggregate or a mixture of different aggregate types without additional information. However, by measuring the difference in something like diffusion time as a function of emission wavelength, the spectral features that correspond to monomeric and aggregated chains can be assigned. Notably, these aggregates are highly emissive in the solid state though not in solution. The results suggest solvent poisoning provides a simple method of producing highly emissive aggregates from otherwise weakly emissive materials.
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Stephanie N. Kramer and Linda A. Peteanu "Detection, identification, and analysis of multi-emitter polymer systems", Proc. SPIE 11799, Physical Chemistry of Semiconductor Materials and Interfaces XX, 1179913 (5 August 2021); https://doi.org/10.1117/12.2594251
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KEYWORDS
Polymers
Absorption
Fluorescence correlation spectroscopy
Luminescence
Diffusion
Optoelectronics
Solid state physics
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