Unknown

Dataset Information

0

Near-Broken-Gap Alignment between FeWO4 and Fe2WO6 for Ohmic Direct p-n Junction Thermoelectrics.

ABSTRACT: We report a near-broken-gap alignment between p-type FeWO4 and n-type Fe2WO6, a model pair for the realization of Ohmic direct junction thermoelectrics. Both undoped materials have a large Seebeck coefficient and high electrical conductivity at elevated temperatures, due to inherent electronic defects. A band-alignment diagram is proposed based on X-ray photoelectron and ultraviolet-visible light reflectance spectroscopy. Experimentally acquired nonrectifying I-V characteristics and the constructed band-alignment diagram support the proposed formation of a near-broken-gap junction. We have additionally performed computational modeling based on density functional theory (DFT) on bulk models of the individual compounds to rationalize the experimental band-alignment diagram and to provide deeper insight into the relevant band characteristics. The DFT calculations confirm an Fe-3d character of the involved band edges, which we suggest is a decisive feature for the unusual band overlap.

SUBMITTER: Schuler R 

PROVIDER: S-EPMC8023528 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

Json Xml
altmetric image

Publications

Near-Broken-Gap Alignment between FeWO<sub>4</sub> and Fe<sub>2</sub>WO<sub>6</sub> for Ohmic Direct p-n Junction Thermoelectrics.

Schuler Raphael R   Bianchini Federico F   Norby Truls T   Fjellvåg Helmer H  

ACS applied materials & interfaces 20210205 6

We report a near-broken-gap alignment between p-type FeWO<sub>4</sub> and n-type Fe<sub>2</sub>WO<sub>6</sub>, a model pair for the realization of Ohmic direct junction thermoelectrics. Both undoped materials have a large Seebeck coefficient and high electrical conductivity at elevated temperatures, due to inherent electronic defects. A band-alignment diagram is proposed based on X-ray photoelectron and ultraviolet-visible light reflectance spectroscopy. Experimentally acquired nonrectifying <i>  ...[more]

Similar Datasets

Unknown Reversible Half Wave Rectifier Based on 2D InSe/GeSe Heterostructure with Near-Broken Band Alignment.
| S-EPMC7887575 | biostudies-literature
Unknown High-performance photocatalytic reduction of Cr(VI) using a retrievable Fe-doped WO<sub>3</sub>/SiO<sub>2</sub> heterostructure.
| S-EPMC10831000 | biostudies-literature
Unknown Cell-induced alignment augments twitch force in fibrin gel-based engineered myocardium via gap junction modification.
| S-EPMC2792050 | biostudies-literature
Unknown Photo-Fenton Process over an Fe-Free 3%-CuO/Sr<sub>0.76</sub>Ce<sub>0.16</sub>WO<sub>4</sub> Photocatalyst under Simulated Sunlight.
| S-EPMC8529691 | biostudies-literature
Unknown WO<sub>3</sub> Nanowires Enhance Molecular Alignment and Optical Anisotropy in Electrospun Nanocomposite Fibers: Implications for Hybrid Light-Emitting Systems.
| S-EPMC8961744 | biostudies-literature
Unknown Magnetic and near-infrared derived heating characteristics of dimercaptosuccinic acid coated uniform Fe@Fe<sub>3</sub>O<sub>4</sub> core-shell nanoparticles.
| S-EPMC7280462 | biostudies-literature
Unknown Effective Visible Light-Driven Photocatalytic Degradation of Ciprofloxacin over Flower-like Fe<sub>3</sub>O<sub>4</sub>/Bi<sub>2</sub>WO<sub>6</sub> Composites.
| S-EPMC7818623 | biostudies-literature
Unknown Sr<sub>9</sub>La<sub>2</sub>(WO<sub>6</sub>)<sub>4</sub> containing [WO<sub>6</sub>] octa-hedra.
| S-EPMC9361373 | biostudies-literature
Unknown Enhanced activation of PMS by a novel Fenton-like composite Fe<sub>3</sub>O<sub>4</sub>/S-WO<sub>3</sub> for rapid chloroxylenol degradation.
| S-EPMC9700388 | biostudies-literature
Unknown A P25/(NH<sub>4</sub>)<sub>x</sub>WO<sub>3</sub> hybrid photocatalyst with broad spectrum photocatalytic properties under UV, visible, and near-infrared irradiation.
| S-EPMC5377943 | biostudies-literature