**5. Conclusions**

In summary, we have attempted in the present chapter to enhance the optical emission and electronic properties of the chosen organic emitting layer for a new generation of the organic light-emitting diode (OLED). The first step is to use the non-conjugated Poly(Vinylcarbazole) (PVK) in the chemical synthesis of the conjugated polymers (case Poly(3-methyl thiophene)). The use of PVK under the chemical synthesis of the poor luminescent Poly(3-alkylthiophene) family permits first the partially crosslinking of the carbazole units, which enhances the PL intensity and improves their luminescence properties. Elsewhere, the use of a new family of small molecules permits also to obtain a blue luminescent organic material with reduced non-radiative recombination of hole and electron. The chemical structures of the synthesized materials were used as an active layer in newly simulated light-emitting devices. DFT simulations on the investigated materials and in the simulated devices show that the introduction of the optimized layer of single-walled carbon nanotubes (SWCNTs) single layer permits to the enhancement of the electron injection and improves the performance of the focused emitting devices.
