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@ARTICLE{Gu:890370,
author = {Gu, Wen-Hao and Zhang, Yi and Guo, Jun and Cai, Jian-Feng
and Zhu, Yu-Ke and Zheng, Fengshan and Jin, Lei and Xu,
Jingtao and Feng, Jing and Ge, Zhen-Hua},
title = {{R}ealizing high thermoelectric performance in n-type
{S}n{S}e polycrystals via ({P}b, {B}r) co-doping and
multi-nanoprecipitates synergy},
journal = {Journal of alloys and compounds},
volume = {864},
issn = {0925-8388},
address = {Lausanne},
publisher = {Elsevier},
reportid = {FZJ-2021-00915},
pages = {158401 -},
year = {2021},
abstract = {Both p- and n-type SnSe single crystals have been reported
to possess high thermoelectric performances, thus
highlighting the possibility for commercialization.
Polycrystalline SnSe that has better mechanical properties
however possesses inferior thermoelectric properties
compared to single crystal SnSe. In this work, n-type
polycrystalline SnSe0.95 + x $wt\%$ PbBr2 (x = 0, 0.5, 1,
and 1.5) samples were synthesized by combining mechanical
alloying and spark plasma sintering technology. The effects
of PbBr2 doping on thermoelectric performance of SnSe were
studied in detail. The results show that the carrier
concentration was dramatically increased from 2.51 × 1017
cm−3 in pure SnSe0.95 to 1.79 × 1019 cm−3 in SnSe0.95 +
1.5 $wt\%$ PbBr2, further resulting in an enhanced
electrical conductivity. Multi-nanoprecipitates are present
in the samples, including SnO, SnPb and SnBrxOy, which
possibly affect the Seebeck coefficient and the lattice
thermal conductivity. A peak ZT value of 1.1 was obtained at
773 K for the SnSe0.95 + 1.0 $wt\%$ PbBr2 sample. This work
highlights that PbBr2 is an effective dopant to improve the
TE performance of n-type polycrystalline SnSe.},
cin = {ER-C-1},
ddc = {540},
cid = {I:(DE-Juel1)ER-C-1-20170209},
pnm = {535 - Materials Information Discovery (POF4-535)},
pid = {G:(DE-HGF)POF4-535},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000624942300050},
doi = {10.1016/j.jallcom.2020.158401},
url = {https://juser.fz-juelich.de/record/890370},
}