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Ian T. Witting
Researcher at Northwestern University
Publications - 22
Citations - 1491
Ian T. Witting is an academic researcher from Northwestern University. The author has contributed to research in topics: Thermoelectric effect & Thermoelectric materials. The author has an hindex of 13, co-authored 21 publications receiving 933 citations. Previous affiliations of Ian T. Witting include North Carolina State University.
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Journal ArticleDOI
Low-Symmetry Rhombohedral GeTe Thermoelectrics
Juan Li,Xinyue Zhang,Zhiwei Chen,Siqi Lin,Wen Li,Jiahong Shen,Ian T. Witting,Alireza Faghaninia,Yue Chen,Anubhav Jain,Lidong Chen,G. Jeffrey Snyder,Yanzhong Pei +12 more
TL;DR: In this paper, the symmetry breaking of band degeneracy is demonstrated in rhombohedral GeTe alloys, having a slightly reduced symmetry from its cubic structure, to realize a record figure of merit (zT ∼ 2.4) at 600 K.
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The Thermoelectric Properties of Bismuth Telluride
Ian T. Witting,Thomas C. Chasapis,Francesco Ricci,Matthew Peters,Nicholas A. Heinz,Geoffroy Hautier,G. Jeffrey Snyder +6 more
TL;DR: In this paper, the authors identify and quantify the key material properties that make Bi2Te3 such a good thermoelectric material, which can be used for benchmarking future improvements in Bi2TE3 or new replacement materials.
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Casting Single Crystal Silicon: Novel Defect Profiles from BP Solar's Mono2 TM Wafers
Nathan Stoddard,Bei Wu,Ian T. Witting,Magnus C. Wagener,Yongkook Park,George A. Rozgonyi,Roger F. Clark +6 more
TL;DR: In this article, a novel crystal growth method has been developed for the production of ingots, bricks and wafers for solar cells, where monocrystallinity is achievable over large volumes with minimal dislocation incorporation.
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Melt-Centrifuged (Bi,Sb)2Te3: Engineering Microstructure toward High Thermoelectric Efficiency
Yu Pan,Yu Pan,Umut Aydemir,Umut Aydemir,Jann A. Grovogui,Ian T. Witting,Riley Hanus,Yaobin Xu,Jinsong Wu,Chao-Feng Wu,Fu-Hua Sun,Hua-Lu Zhuang,Jinfeng Dong,Jing-Feng Li,Vinayak P. Dravid,G. Jeffrey Snyder +15 more
TL;DR: A method for synthesizing high-efficiency porous thermoelectric materials through an unconventional melt-centrifugation technique, resulting in a porous network with a platelet structure with a zT value higher than fully dense conventional zone melted ingots and hot pressed (Bi,Sb)2 Te3 alloys.
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Synergistic modulation of mobility and thermal conductivity in (Bi,Sb)2Te3 towards high thermoelectric performance
Yu Pan,Yu Pan,Yang Qiu,Ian T. Witting,Liguo Zhang,Chenguang Fu,Jing Wei Li,Yi Huang,Fu Hua Sun,Jiaqing He,G. Jeffrey Snyder,Claudia Felser,Jing-Feng Li +12 more
TL;DR: In this paper, a two-step sintering process with excess Te was used to achieve high mobility and low lattice thermal conductivity in (Bi,Sb)2Te3.