Absence of Structural Impact of Noble Nanoparticles on P3HT: PCBM Blends for Plasmon Enhanced Bulk-Heterojunction Organic Solar Cells Probed by Synchrotron Grazing Incidence X-Ray Diffraction

摘要

The incorporation of noble metal nanoparticles, displaying localized surfaceplasmon resonance, in the active area of donor-acceptor bulk-heterojunctionorganic photovoltaic devices is an industrially compatible light trappingstrategy, able to guarantee better absorption of the incident photons and givean efficiency improvement between 12% and 38%. In the present work, weinvestigate the effect of Au and Ag nanoparticles blended with P3HT: PCBM onthe P3HT crystallization dynamics by synchrotron grazing incidence X-raydiffraction. We conclude that the presence of (1) 80nm Au, (2) mix of 5nm,50nm, 80nm Au, (3) 40nm Ag, and (4) 10nm, 40nm, 60nm Ag colloidalnanoparticles, at different concentrations below 0.3 wt% in P3HT: PCBM blends,does not affect the behaviour of the blends themselves.