Poly(fluorene-oxadiazole) copolymer-based light-emitting devices on a plastic substrate

Luminescence property of poly(1,3-bis(phenyl-1,3,4-oxadiazole))s containing polar groups in the main chain

“…Oxadiazole moiety is a good electron transporter, thereby increasing the quantum yield of fluorescence. Polyoxadiazole containing carbazole, polyfluorene, and phosphonated moiety are soluble in organic solvent and shows high quantum yield of fluorescence [19][20][21][22][23][24].…”

Synthesis and Characterization of 1,2,4-Oxadiazole-Based Deep-Blue and Blue Color Emitting Polymers

“…The PL quantum efficiencies ( f ) of polymers PFBOB and PFTOT in chloroform were found to reach as high as 1.00 for PFBOB and 0.44 for PFTOT compared with that of DPA ( f = 0.90, in chloroform) as the standard. In comparison with PFs 2 and structurally quite similar polymers containing 1,3,4-oxadiazole moiety, 12,13,19 polymer PFBOB showed quite narrow and only blue emission PL band with blue shifted emission maximum.…”

“…To overcome those issues, synthesizing light-emitting polymers showing high electron affinity (n-dope type polymers) is crucial because those polymers itself transport the electron quite well, and consequently, might offer highly efficient PLEDs without any electron transporting layer. Previously strong electron accepting 1,3,4-oxadiazole unit was incorporated in polymer main chain and the resulting n-dope type polymers were successfully used as light emitting [11][12][13][14][15][16][17][18][19] and electron transporting 20,21 layers in the PLEDs preparation. In addition, polymers containing 1,3,4-oxadiazole unit have been successfully utilized as fluorogenic chemosensors for the selective detection of metal ions.…”

Poly(oxadiazole)s

“…Alkylated 2,7dibromo-9H-fluorene compounds, with pendent carbazole and oxadiazole units can be condensed with nickel catalysts. 26,27 This type of polymerization is referred to as Yamamoto coupling. 28,29 Polymers prepared by Yamamoto coupling exhibit a higher degree of polymerization than those prepared by the Heck reaction.…”