Polymer light-emitting diode electron injection/transporting layer

Within the last years, oxadiazoles like 2-(biphenyl)-5-(4-tert.butylphenyl)-1,3,4-oxadiazole (PBD) 2 have been frequently applied in organic light emitting diodes [3]. Here the electron withdrawing oxadiazole unit dominates the electronic properties and the oxadiazole compounds act as electron injection and transport layers. Furthermore, 2,5-diphenyloxa-diazoles have been used as building blocks in thermostable polymers and they are highly fluorescent as well. 

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