Investigation of large Seebeck effect by charge mobility engineering in CuAlO2 thin films grown on Si substrate by thermal evaporation

Mahmood, K.; Abbasi, Sidra; Zahra, Rabab; Rehman, U.

doi:10.1016/j.ceramint.2018.06.263

Cited by 40 publications

(9 citation statements)

References 27 publications

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“…Two of the final three candidates among the top 20 both involve Cu, 2 BaAl 2 normalO 4 + 4 AlCuO 2 + normalO 2 ⇌ 4 CuO + 2 BaAl 4 normalO 7 4 AlCuO 2 + 2 SrAl 2 normalO 4 + normalO 2 ⇌ 4 CuO + 2 SrAl 4 normalO 7 which should both be regarded as fairly promising since (Ba,Sr)Al 2 O 4 are catalysts and CuO/CuO 2 is one the best-known OCs. Also, there is evidence to suggest that (Ba,Sr)Al 4 O 7 as well as AlCuO 2 display good thermal stability …”

Section: Resultsmentioning

confidence: 99%

Discovery of Oxygen Carriers by Mining a First-Principle Database

et al. 2023

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Chemical looping is an innovative technique that relies, to a large extent, on the possibility of finding new oxygen carriers. Until now, these materials have primarily been identified via experimental techniques and therefrom derived insights. However, this is both costly and time-consuming. To speed-up this process, we have applied a computational screening approach based on energetic data retrieved from the Open Quantum Materials Database. In particular, we have considered combinations of all mono-, bi-, and trimetallic alloys and mixed oxides with up to three distinctive phases. Here, we specifically focus on a technique referred to as chemical looping oxygen uncoupling, which is especially suitable for solid fuels, e.g., combustion of biomass for negative CO 2 emissions. The formation energies obtained for the materials of interest were used to identify phase transitions that are likely to occur under conditions relevant for chemical looping oxygen uncoupling. Given these criteria, the initial list of 300000 materials is reduced by a factor of 20, and after filtering out rare, radioactive, toxic, or harmful elements only 1000 remain. When considering the abundance of elements in the ranking criteria, most of the highest ranking phases include Cu, Mn, and Fe. This adds credibility to the procedure, as many viable oxygen carriers for chemical looping oxygen uncoupling that have been studied experimentally contain these elements. While Cr-based materials have not been widely explored for this application, our study suggests that this might be worthwhile since these occur more frequently than Fe. Other elements that would be interesting as additional components include Ba, K, Na, Al, and Si.

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Section: Resultsmentioning

confidence: 99%

Discovery of Oxygen Carriers by Mining a First-Principle Database

et al. 2023

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“…For instance, impurity scattering was hypothesized to be responsible for the measured change in the sign of S in Ni‐doped CoSb 3 below 20 K. [ 73 ] Energy‐dependent scattering from resonant impurities was studied with an idealized Green's function model to suggest a possible enhancement and sign reversal of S as well as a peak in σ. [ 74 ] Abrupt changes of mobility with energy and temperature have also been associated with observations of giant enhancements of S values in materials near phase transitions, such as double perovskites, [ 75 ] CuAlO 2 , [ 76 ] and Cu 2 Se. [ 77 ] An explanation of the large enhancement of S in CuFeS 2 below 50 K was proposed by considering strong energy dependence of hopping transport.…”

Section: Introductionmentioning

confidence: 99%

Anomalous Thermoelectric Transport Phenomena from First‐Principles Computations of Interband Electron–Phonon Scattering

Fedorova

Cepellotti

Kozinsky

2022

Adv Funct Materials

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The Seebeck coefficient and electrical conductivity are two central quantities to be optimized simultaneously in designing thermoelectric materials, and they are determined by the dynamics of carrier scattering. Here a new regime is uncovered where the presence of multiple electron bands with different effective masses, crossing near the Fermi level, leads to strong energydependent carrier lifetimes due to intrinsic electron-phonon scattering. In this anomalous regime, electrical conductivity decreases with carrier concentration, Seebeck coefficient reverses sign even at high doping, and power factor exhibits an unusual second peak. The origin and magnitude of this effect is explained using a general simplified model as well as first-principles Boltzmann transport calculations in recently discovered half-Heusler alloys. General design rules for using this paradigm to engineer enhanced performance in thermoelectric materials are identified.

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“…Thermo-electric materials are the hot topic for the researchers nowadays because of their excellent energy harvesting properties i.e. Electricity generation from the waste heat by using the phenomenon of the Seebeck effect [5]. Beside this it has some advantages like noise free, no mechanical or moving part, maintenance free, cost effective and long-life applications [6,7].…”

Section: Introductionmentioning

confidence: 99%

Influence of post annealing temperature on the thermoelectric properties of bulk ZnSnO

Ali¹,

Rehman²,

Mahmood³

et al. 2021

JOR

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In this manuscript, we have studied the structural, electrical and thermoelectric properties of bulk ZnSnO by post growth annealing method. X-Ray Diffraction data showed that the crystallinity was found to be improved y annealing up to 700oC due to compensation of oxygen vacancy type donor defects. But further annealing forced the oxygen atoms to diffuse into the interstitial sites, therefore causes degradation in the crystal quality. Thermoelectric properties were increased with annealing temperature up to 700oC and then decreased due to further annealing. The sharp enhancement of thermoelectric properties is due to mobility increase of carriers.

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Investigation of large Seebeck effect by charge mobility engineering in CuAlO2 thin films grown on Si substrate by thermal evaporation

Cited by 40 publications

References 27 publications

Discovery of Oxygen Carriers by Mining a First-Principle Database

Discovery of Oxygen Carriers by Mining a First-Principle Database

Anomalous Thermoelectric Transport Phenomena from First‐Principles Computations of Interband Electron–Phonon Scattering

Influence of post annealing temperature on the thermoelectric properties of bulk ZnSnO

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