**6. Conclusion**

It is well known from the literature that, the need for thermoelectric material for power generation and refrigeration is increasing day by day. Nowadays, heat generation from automobiles, factories, combustion of fossil fuels, nuclear decay, etc. is increasing a lot and it is necessary to convert these waste heat into useful form. Therefore, development of thermoelectric material which can convert the waste heat into electricity will be a milestone for the modern technology. Even though the ZT value of perovskite was very small, we can tune the properties of these materials by nanostructuring, band gap engineering, and by doping. In these thermoelectric perovskite materials, SrTiO3/SrTi0.8Nb0.2O3 /SrTiO3 was considered to be the best material with a ZT value of 2.4 at 300 K. Therefore, there are many possibilities in perovskite materials to be a replaceable candidate for TE applications. The hybrid perovskites which are low cost and easily synthesized by energy cost methods can be potential TE material in future at room temperature range. In the case of these materials, CH3NH3PbI3-n-type shows a ZT of 2.56 at 800 K, which was only a theoretical calculation. Further in future, we can make all the calculations be true for an alternative energy resource for the world.

### **Author details**

Megha Unikoth<sup>1</sup> \*, George Varghese<sup>2</sup> , Karakat Shijina<sup>3</sup> and Hind Neelamkodan<sup>1</sup>


© 2022 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

*Thermoelectric Nanostructured Perovskite Materials DOI: http://dx.doi.org/10.5772/intechopen.106614*
