2019
DOI: 10.1002/aenm.201900354
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Synergistical Enhancement of Thermoelectric Properties in n‐Type Bi2O2Se by Carrier Engineering and Hierarchical Microstructure

Abstract: Oxygen‐containing compounds are promising thermoelectric (TE) materials for their chemical and thermal stability. As compared with the high‐performance p‐type counterparts (e.g., ZT ≈1.5 for BiCuSeO), the enhancement of the TE performance of n‐type oxygen‐containing materials remains challenging due to their mediocre electrical conductivity and high thermal conductivity. Here, n‐type layered Bi2O2Se is reported as a potential TE material, of which the thermal conductivity and electrical transport properties ca… Show more

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Cited by 65 publications
(64 citation statements)
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“…Moreover, Ta is less electronegative than Bi, thereby easily extracting electrons. Therefore, Tan et al chose Ta as the dopant to increase the carrier concentration, thereby enhancing the electrical transport properties of Bi 2 O 2 Se [ 68 ].…”
Section: Various Attempts To Enhance Thermoelectric Properties Of Bi 2 O 2 Sementioning
confidence: 99%
See 2 more Smart Citations
“…Moreover, Ta is less electronegative than Bi, thereby easily extracting electrons. Therefore, Tan et al chose Ta as the dopant to increase the carrier concentration, thereby enhancing the electrical transport properties of Bi 2 O 2 Se [ 68 ].…”
Section: Various Attempts To Enhance Thermoelectric Properties Of Bi 2 O 2 Sementioning
confidence: 99%
“… where, C v and v a represent the specific heat capacity per unit volume and average sound speed, respectively. A highly intense phonon scattering process and decrease of κ lat in Ta-doped Bi 2 O 2 Se can be seen from monotonically reduced l ph from ~11.9 Å for Bi 2 O 2 Se to ~9.9 Å for Bi 1.90 Ta 0.10 O 2 Se, which mainly results from that Ta substitution introduces multi-scale lattice defects, including the enormous defects, grain boundaries, and phase interfaces [ 68 , 77 ].…”
Section: Various Attempts To Enhance Thermoelectric Properties Of Bi 2 O 2 Sementioning
confidence: 99%
See 1 more Smart Citation
“…Furthermore, replacing O with electropositive S or Te can significantly reduce the band gap and enhance the electrical conductivity as well [27,28]. Inspired by the previously reported results of Ta-doped Bi 2 O 2 Se [29], we studied the effects of Nb-doped Bi 2 O 2 Se on the electrical and thermal transport properties. Despite the fact that the influence of Nb doping on the electrical transport properties was investigated [30], the electron concentration has not been fully optimized and the figure of merit ZT has not been provided due to the lack of the thermal conductivity.…”
Section: Introductionmentioning
confidence: 98%
“…The unique properties of Bi 2 O 2 Se have also been recognized in other application domains, [ 36 ] such as neuromorphic computing, [ 37 ] optoelectronics, [ 38–42 ] ferroelectronics, [ 43,44 ] magnetoelectronics, [ 45 ] and thermoelectrics. [ 46–48 ] Recent investigations on the fundamental properties of Bi 2 O 2 Se, including defects, [ 49–51 ] band structures, [ 52,53 ] and so on, have gained more insights into this material for its developmental applications.…”
Section: Introductionmentioning
confidence: 99%