Fig. 5: One-step broad PL emission tuning in PFO-based blend films. | Nature Communications

Fig. 5: One-step broad PL emission tuning in PFO-based blend films.

From: Rapid and high-resolution patterning of microstructure and composition in organic semiconductors using ‘molecular gates’

Fig. 5

a Photographs of an inverted PFO/pNaSS/dye-blend trilayer on a glass substrate taken under UV illumination during exposure to 1 : 1 acetone : water vapour at the indicated times. b Schematic illustration of the process in a, showing the solvent-vapour-induced (quasi-)sequential diffusion of the cyan- and orange-emitting dyes with increasing exposure time, texp. c Photograph of a similarly processed PFO-based blend film but with relative solvent vapour pressure, Pvap, increasing from top to bottom of the sample, resulting in a gradient of PL emission colours. d PL spectra recorded for the sample in c spanning positions from top to bottom.

Back to article page