Organic electroluminescent devices based on polyurethane derivatives: effects of substituents on electroluminescent and photoluminescent properties

Carbazole-based polymers as hosts for solution-processed organic light-emitting diodes: Simplicity, efficacy

“…As first examples, polyurethanes can be cited as co-polymerizing agents. Choice of polyurethane was notably motivated by their successful incorporation in hole-transport [112][113][114] or light-emitting materials [115,116], evidencing that these polymers are usable in Organic Electronics. Classically, polyurethanes are studied for their remarkable mechanical properties but application of polyurethanes in PLEDs is uncommon.…”

Electrochemical fluorescence switching properties of conjugated polymers composed of triphenylamine, fluorene, and cyclic urea moieties

“…In addition, PU conducting polymers have recently been developed59–61 and applications of PUs on PLED have been reported. For example, PUs can be used as effective hole‐transport matrix62–65 as well as applied for light emitting layers 66–68. Traditional methods for PU synthesis usually involve diamine and diisocyanate moieties, which are toxic reagents.…”

Carbazole–oxadiazole containing polyurethanes as phosphorescent host for organic light emitting diodes

“…Since the PU systems formed from diisocyanate and diol contains polar protic -NH(CO)-components and many fluorescent dyes usually contain the hydrogen bond accepting groups such as nitrile, pyridyl, or amino groups, these observations lead to a suspicion on whether PU is an appropriate matrix for the light emitting layer. Ha reported the first attempt on using PU-DCM as the matrix for the red-emission PLED [19,20]. In these cases, the maximum brightness of the devices was 50-60 cd/m 2 (Red emission).…”

“…Recently, applications of PUs on PLED have been reported. It has been demonstrated that PUs could be used as effective hole-transport matrix [16][17][18] as well as applied for light emitting layers [19,20]. Since PUs were usually prepared from condensation polymerization of diols and diisocyanates under metal-ion free conditions, [21] metal-ion contaminants could therefore be minimized.…”