@article {4067,
	title = {Thermoelectric properties of Mn doped BiCuSeO},
	journal = {Materials Research Express},
	volume = {6},
	year = {2019},
	note = {n/a},
	month = {2019},
	pages = {086305},
	publisher = {IOP Publishing},
	abstract = {<p>BiCuSeO is a promising thermoelectric material having earth-abundant non-toxic constituents and favourable thermoelectric properties like ultra-low thermal conductivity. In this study, Mn+2 has been introduced at the Bi+3 site to increase hole concentration as well as Seebeck coefficient, through aliovalent doping and magnetic impurity incorporation respectively. Samples were prepared through two-step solid state synthesis with the composition Bi1-xMnxCuSeO (x~=~0.0, 0.04, 0.06, 0.08, 0.10 and 0.12). X-ray diffraction patterns confirmed the tetragonal (space group: P4/nmm) crystal structure of BiCuSeO as well as phase purity of the samples. The Seebeck coefficient and electrical resistivity had a decreasing trend with increasing doping fraction owing to the generation of charge carriers. The samples with x~=~0.04 and 0.06 showed temperature independent Seebeck coefficient above 523 K, which is a signature of small polaron hopping. While the Seebeck coefficient of the samples with x~=~0.08, 0.10 and 0.12 increased above 523 K due to the combination of localized and extended states. The thermal conductivity was dominated by the lattice part of the thermal conductivity. As a result of moderate Seebeck coefficient and low electrical resistivity, the highest power factor of 0.284 mW m-1-K2 was obtained for the Bi0.92Mn0.08CuSeO at 773 K, leading to a maximum zT of 0.4 at 773.</p>
},
	isbn = {2053-1591},
	url = {http://dx.doi.org/10.1088/2053-1591/aaf710},
	author = {Das, Sayan and Valiyaveettil, Suneesh Meledath and Kuei-Hsien Chen and Suwas, Satyam and Mallik, Ramesh Chandra}
}
