**Conflict of interest**

The optimization process is starting from simulation firstly and is passing to producing secondly some Organic-TFT transistors, fabricated at room temperatures, avoiding expensive white rooms. Also, their applications are useful in green industries, with the huge advantage of low cost, a high economical impact and green eco-technologies of fabrication. Traditional organic semiconductors based on polynuclear aromatic hydrocarbons like pentacene [44] are susceptible to processing problems related to the high toxicity/carcinogenic of the precursors [45]. Therefore, there are strongly envisaged OTFTs with green polymers grafted on the Nano-Core-Shells (NCS) structured materials or alternative nanocomposites, appealing to green chemistry synthesis routes.

**Figure 3.** (a) The simulation results of a OTFT biased at VS = 0 V, VD = 40 V, VTG = −10 V and VBG ≤ 0V, emphasizing the conduction by a volume electron conduction channel; (b) the potential distribution in OTFT biased at VS = 0 V, VD = 4 V,

For the experimental synthesis of semiconductors are considered those green polymers without carcinogenic precursors, suitable for multi-shell assembling on ferrite nanocore. A surface polymerization of polymer attaches a multi-shell structures of type Fe3O4 /Cu/Ag/Au-shell of stabilization-shell conductor polymer. The polymer grafting of the np's surface can be dem-

On the other hand, the nanomaterials that are suitable to assemble smart bio-film, can be adapted to assemble organic semiconductors, too. In this sense, the Gold nanoparticles are very promising due to their applications, as catalysts, biosensing, photodynamic therapy, drugs delivery, and also in electronics [46]. The optoelectronics applicability occurs due to their quantum size effect, under the interaction between light and electrons onto the surface of the gold nanoparticles, [47]. Gold nanoparticles—AuNP - dendrimer structures match the therapeutic properties of AuNP with the dendrimers reactivity offering special properties for

The chapter presented a general vision on the nowadays green electronics products and technologies. The topic includes but not limited to low voltage circuits and low size devices,

onstrated by FT-IR and RAMAN tests.

VTG = −10 V and VBG = −30 V emphasizing a weak conduction regime.

the cellular membrane transport.

**6. Conclusions**

8 Green Electronics

There is no conflict of interest.
