Ultrahigh Power Factor and Electron Mobility in n-Type Bi2 Te3 -x %Cu Stabilized under Excess Te Condition

ACS Applied Materials & Interfaces
Joonil ChaIn Chung

Abstract

The thermoelectric (TE) community has mainly focused on improving the figure of merit (ZT) of materials. However, the output power of TE devices directly depends on the power factor (PF) rather than ZT. Effective strategies of enhancing PF have been elusive for Bi2Te3-based compounds, which are efficient thermoelectrics operating near ambient temperature. Here, we report ultrahigh carrier mobility of ∼467 cm2 V-1 s-1 and power factor of ∼45 μW cm-1 K-2 in a new n-type Bi2Te3 system with nominal composition Cu x Bi2Te3.17 (x = 0.02, 0.04, and 0.06). It is obtained by reacting Bi2Te3 with surplus Cu and Te and subsequently pressing powder products by spark plasma sintering (SPS). The SPS discharges excess Te but stabilizes the high extent of Cu in the structure, giving unique SPS Cu x Bi2Te3.17 samples. The analyzed composition is close to "Cu x Bi2Te3". Their charge transport properties are highly unusual. Hall carrier concentration and mobility simultaneously increase with the higher mole fraction of Cu contrary to the typical carrier scattering mechanism. As a consequence, the electrical conductivity is considerably enhanced with Cu incorporation. The Seebeck coefficient is nearly unchanged by the increasing Cu content in cont...Continue Reading

References

Feb 7, 2004·Science·Kuei Fang HsuMercouri G Kanatzidis
Oct 18, 2006·Proceedings of the National Academy of Sciences of the United States of America·Nathan S Lewis, Daniel G Nocera
Oct 30, 2009·Angewandte Chemie·Joseph R SootsmanMercouri G Kanatzidis
Jan 25, 2011·Nature Chemistry·Kanishka BiswasMercouri G Kanatzidis
Sep 22, 2012·Nature·Kanishka BiswasMercouri G Kanatzidis
May 3, 2014·Nature Communications·Yeseul LeeMercouri G Kanatzidis
May 17, 2014·Physical Chemistry Chemical Physics : PCCP·James R SalvadorAndrew A Wereszczak
Mar 4, 2015·Proceedings of the National Academy of Sciences of the United States of America·Weishu LiuZhifeng Ren
Jun 11, 2015·Environmental Science & Technology·Daniel B Gingerich, Meagan S Mauter
Apr 26, 2016·Angewandte Chemie·Wolfgang G ZeierG Jeffrey Snyder
Jul 28, 2016·Nature Communications·Gangjian TanMercouri G Kanatzidis
Sep 1, 2016·Chemical Reviews·Gangjian TanMercouri G Kanatzidis
Nov 3, 2016·Journal of the American Chemical Society·Kunsu ParkTaeghwan Hyeon
Nov 20, 2016·Proceedings of the National Academy of Sciences of the United States of America·Ran HeZhifeng Ren
Jan 5, 2017·Nature Communications·Zhiwei ChenYanzhong Pei
Mar 7, 2017·Journal of the American Chemical Society·Manoj K JanaKanishka Biswas
Jun 30, 2018·Journal of the American Chemical Society·Chongjian ZhouIn Chung

❮ Previous
Next ❯

Citations

Dec 1, 2021·ACS Applied Materials & Interfaces·Xinyu ChenRan Ang

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Sanyukta GhoshRamesh Chandra Mallik
Dalton Transactions : an International Journal of Inorganic Chemistry
Jin Hee KimDocheon Ahn
Physical Chemistry Chemical Physics : PCCP
Yong-Bin ZhuYong Liu
Dalton Transactions : an International Journal of Inorganic Chemistry
Masahiro HayashiTsuyoshi Koyanagi
© 2021 Meta ULC. All rights reserved