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In situ monitoring of laser induced periodic surface structures on conjugated polymers of interest in organic photovoltaics

AutorRodríguez-Rodríguez, A.; Rebollar, Esther ; García-Gutiérrez, Mari Cruz ; Rueda, Daniel R. ; Portale, G.; Castillejo, Marta ; Ezquerra, Tiberio A.
Fecha de publicación6-may-2016
CitaciónE-MRS Spring Meeting (2016)
ResumenFormation of laser induced periodic surface structures (LIPSS) has been observed on polymers upon irradiation with a linearly polarized laser beam, at wavelengths efficiently absorbed and within a narrow fluence range below the ablation threshold. LIPSS are the result of the interference between the incoming and the surface-scattered waves together with a feedback mechanism. The use of grazing incidence X-ray scattering techniques with synchrotron radiation can be very useful for LIPSS analysis as they can provide kinetic information in the millisecond range and structural information statistically averaged over a large area. We report on the formation of LIPSS on conjugated polymers of interest in organic photovoltaics upon irradiation with the second and fourth harmonics of a Nd:YAG laser (532 and 266 nm) followed online by synchrotron Grazing Incidence X-ray Scattering at small (GISAXS) and wide (GIWAXS) angles. In situ measurements were performed at the DUBBLE beamline of the European Synchrotron Radiation Facility in order to study the evolution of the structural features online upon repetitive irradiation and to obtain information about the mechanisms involved in LIPSS formation. The number of pulses needed for the onset of LIPSS formation and for achieving the optimal order of the structures varies for the different polymers and irradiation conditions. The real time monitoring allows online optimization of both laser fluence and repetition rate for LIPSS formation.
DescripciónE-MRS Spring Meeting (European Materials Research Society); Lille (France); May 2 to 6 2016; http://www.european-mrs.com/2016-spring-symposium-cc-european-materials-research-society
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(IQFR) Comunicaciones congresos
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