Fig. 4: Molecular structure and phosphorescence properties of the multicomponent copolymer PDBA under ambient conditions.
From: Color-tunable ultralong organic room temperature phosphorescence from a multicomponent copolymer
a Molecular structure of polymer PDBA. b Excitation–phosphorescence mapping of PDBA film. The inset image shows the phosphorescence spectra of PDBA excited by corresponding excitation wavelengths. c CIE chromaticity diagram for polymer PDBA with excitation varied from 230 to 330 nm. Inset: UOP photographs of polymer film PDBA excited at 254 and 310 nm after switching off the UV light, respectively. d Lifetime decay curves of bands at 447 and 514 nm in polymer PDBA, respectively. e Phosphorescence excitation spectra of polymer PDBA at 447 and 514 nm.
