Fig. 1: Formation mechanism of submillimeter-scale spherulite film.
From: Ultralong-range exciton transport in submillimeter-scale spherulite film of π-conjugated polymers
a A 3D schematic of the desired morphology composed of submillimeter-scale spherulite film based on light-emitting π-conjugated polymers to achieve ultralong-range exciton diffusion, together with the chemical structure of PEODPF. b Single-crystal structure of PEODPF monomer (a-axis direction). c Polarization microscope (POM) images of PEODPF spherulite at different growth stages together with a schematic illustration of the proposed growth model (bottom right corner). d Spherulite obtained under solvent vapor annealing (SVA) processing at different environmental temperatures. e Histogram of radius distribution of spherulites. Data were presented as mean values ± s.d., n = 42 (20 °C), 30 (30 °C), 26 (40 °C), 9 (50 °C), 26 (60 °C), and 43 (70 °C). Here, n denotes the number of independent spherulites identified within microscopy images acquired at the same scale for each temperature condition.
