Abstract

Boutheina Ben Abdelaziz^1*, Nazir Mustapha², A. I. ALAKHRAS⁴ ,Hajo Idriss^2,4

DOI : http://dx.doi.org/10.13005/ojc/390204

This work aims to investigate the optical and electrical features of light-emitting diodes based on conjugated oligomer and various quantities of ZnO nanoparticles. Thermionic emission and Cheung’s methods have been employed to analyze electrical results. Furthermore, the analytical findings concerning Photoluminescence (PL) are modeled using the sum of Franck-Condon (FC) analysis and Gaussians Fits. The p-n junction has been formed between the oligomer and nanoparticles. The ideality factor values decrease by boosting the quantity of ZnO nanoparticles linked with the traps filling by the free carrier at the interface Oligomer/ZnO from the dissociation of the interfacial charge transfer (CT) excitons. Also, an increased saturation current is obtained and it is reached ~ 5.02x〖10〗^(-6) A for 2 mg of ZnO. By adding ZnO nanoparticles the energy transition E_0 for the Oligomer: ZnO blends are slightly red shifted. In addition, the Huang-Rhys factor decreases by increasing the concentration of ZnO in the blend. Ordered conformation is obtained with addition of this metal oxide.

Oligomer; p-n junction; photoluminescence; ZnO nanoparticles

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