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Virtual Conference on Thermoelectrics An online event to highlight the work of early-career researchers July 21-23, 2020 in the thermoelectrics community Book of Abstracts conferences.mines.edu/vct2020 Organizers A team of faculty members, postdocs, and graduate students have contributed to organizing the Virtual Conference on Thermoelectrics 2020 Primary Organizers Alexandra Zevalkink Prashun Gorai Dario Narducci Paolo Mele Yanzhong Pei US Team Lead US Team Lead Europe Team Lead Asia Team Lead China Team Lead conferences.mines.edu/vct2020/organizers/ Asia Team Paolo Mele Kanishka Biswas Zhigang Chen Kedar Hippalgaonkar Professor Associate Prof. Professor Assistant Prof. Shibaura Institute of Tech. JNCASR Univ. South Queensland NTU Singapore Michihiro Ohta Yanzhong Pei Supree Pinitsoontor Shrikant Saini Senior Researcher Professor Associate Prof. Researcher AIST Tsukuba Tongji Univ. Khon Kaen University Kyutech Chenguang Fu Swapnil Ghodke Giovanna Latronico Postdoc Postdoc Graduate Student Max Planck Institute Nagoya Univ. Shibaura Institute of Tech. conferences.mines.edu/vct2020/organizers/ Europe Team Dario Narducci Monica Fabrizio Alessia Famengo António Pereira Gonçalves Professor Research Executive Researcher Coordinator Researcher Univ. of Milano Bicocca CNR-ICMATE Italy CNR-ICMATE Italy University of Lisbon Lamya Abdellaoui Yue Lin Andrei Novitskii Laura Paradis-Fortin Postdoc Postdoc Academic Researcher Postdoc MPIE Germany Univ. of Cambridge NUST-MISIS Russia Univ. of Caen Normandy conferences.mines.edu/vct2020/organizers/ US Team Alexandra Zevalkink Prashun Gorai Eric Toberer Assistant Prof. Research Asst. Prof. Associate Prof. Michigan State Univ. Colorado School of Mines Colorado School of Mines Ashiwini Balodhi Mario Caledron Giacomo Cerretti Kazuki Imasato Postdoc Graduate Student Postdoc Graduate Student Michigan State Univ. Michigan State Univ. Jet Propulsion Lab Northwestern Univ. Monique Noel Wanyue Peng Graduate Student Graduate Student Michigan State Univ. Michigan State Univ. conferences.mines.edu/vct2020/organizers/ Foreword In light of the cancellation of the International Conference on Thermoelectrics (ICT), we are organizing the first Virtual Conference on Thermoelectrics (VCT) on July 21-23, 2020. In organizing VCT 2020, our vision was to proviDe early-career researchers in the thermoelectrics community with an online platform to highlight anD share their work. In this spirit, the call for oral contributions was restricteD to stuDents anD postDocs. Oral presentations were selecteD baseD on nominations from principal investigators anD senior researchers. Poster contributions are open to all registereD participants anD helD over Twitter. VCT 2020 is a free event, with no registration fee. Given the initial positive reception of VCT 2020, we organizeD three regional chapters– Asia, Europe, anD the US. In response to the call for abstracts, we receiveD in excess of 300 nominations for oral presentations. In aDDition, we also receiveD about 100 abstracts for poster presentations. The oral presentations are scheDuleD across 12 time zones to accommoDate the global scale of this event. RegistereD participants can attenD talks in all regional chapters. VCT 2020 is enDorseD by the International Thermoelectrics Society (ITS). We are happy to announce that ACS ApplieD Energy Materials has partnereD with us for VCT 2020. Finally, the organization of VCT 2020 is maDe possible by a DeDicateD team of faculty members, senior researchers, postDocs, anD graDuate stuDents from across the worlD. Best wishes, VCT 2020 Organizers Conference website: conferences.mines.eDu/vct2020 1 Index • Program-at-a-glance 3 • Asia abstracts 5 • Oral abstracts 6 • Poster abstracts 150 • Europe abstracts 175 • Oral abstracts 176 • Poster abstracts 267 • US abstracts 313 • Oral abstracts 314 • Poster abstracts 380 2 Program-at-a-Glance Asia Program US Program EU Program IN, TH CN, SG JP, KR, AUS Los Angeles Brussels New Delhi Beijing Tokyo UTC-7 UTC+2 UTC+5.5 UTC+8 UTC+9 16:00 1:00 4:30 7:00 8:00 Day 1: 17:00 2:00 5:30 8:00 9:00 July 21 18:00 3:00 6:30 9:00 10:00 19:00 4:00 7:30 10:00 11:00 20:00 5:00 8:30 11:00 12:00 21:00 6:00 9:30 12:00 13:00 22:00 7:00 10:30 13:00 14:00 23:00 8:00 11:30 14:00 15:00 0:00 9:00 12:30 15:00 16:00 1:00 10:00 13:30 16:00 17:00 2:00 11:00 14:30 17:00 18:00 3:00 12:00 15:30 18:00 19:00 4:00 13:00 16:30 19:00 20:00 5:00 14:00 17:30 20:00 21:00 6:00 15:00 18:30 21:00 22:00 7:00 16:00 19:30 22:00 23:00 8:00 17:00 20:30 23:00 0:00 Day 2: 9:00 18:00 21:30 0:00 1:00 July 22 10:00 19:00 22:30 1:00 2:00 11:00 20:00 23:30 2:00 3:00 12:00 21:00 0:30 3:00 4:00 13:00 22:00 1:30 4:00 5:00 14:00 23:00 2:30 5:00 6:00 15:00 0:00 3:30 6:00 7:00 16:00 1:00 4:30 7:00 8:00 17:00 2:00 5:30 8:00 9:00 18:00 3:00 6:30 9:00 10:00 19:00 4:00 7:30 10:00 11:00 20:00 5:00 8:30 11:00 12:00 21:00 6:00 9:30 12:00 13:00 22:00 7:00 10:30 13:00 14:00 23:00 8:00 11:30 14:00 15:00 0:00 9:00 12:30 15:00 16:00 1:00 10:00 13:30 16:00 17:00 2:00 11:00 14:30 17:00 18:00 3:00 12:00 15:30 18:00 19:00 4:00 13:00 16:30 19:00 20:00 3 5:00 14:00 17:30 20:00 21:00 6:00 15:00 18:30 21:00 22:00 7:00 16:00 19:30 22:00 23:00 8:00 17:00 20:30 23:00 0:00 Day 3: 9:00 18:00 21:30 0:00 1:00 July 23 10:00 19:00 22:30 1:00 2:00 11:00 20:00 23:30 2:00 3:00 12:00 21:00 0:30 3:00 4:00 13:00 22:00 1:30 4:00 5:00 14:00 23:00 2:30 5:00 6:00 15:00 0:00 3:30 6:00 7:00 16:00 1:00 4:30 7:00 8:00 17:00 2:00 5:30 8:00 9:00 18:00 3:00 6:30 9:00 10:00 19:00 4:00 7:30 10:00 11:00 20:00 5:00 8:30 11:00 12:00 21:00 6:00 9:30 12:00 13:00 22:00 7:00 10:30 13:00 14:00 23:00 8:00 11:30 14:00 15:00 0:00 9:00 12:30 15:00 16:00 1:00 10:00 13:30 16:00 17:00 2:00 11:00 14:30 17:00 18:00 3:00 12:00 15:30 18:00 19:00 4:00 13:00 16:30 19:00 20:00 5:00 14:00 17:30 20:00 21:00 6:00 15:00 18:30 21:00 22:00 7:00 16:00 19:30 22:00 23:00 8:00 17:00 20:30 23:00 0:00 9:00 18:00 21:30 0:00 1:00 10:00 19:00 22:30 1:00 2:00 11:00 20:00 23:30 2:00 3:00 12:00 21:00 0:30 3:00 4:00 4 Asia Program 5 Abstract number: AS-O.1-01 Anisotropic thermoelectric transport in textured bismuth-antimony chalcogenide nanomaterials synthesized by facile bottom-up physical process R.S.C. Bose,1 V. Sheoran,1 P.S.H. Vaishnavi,1 D.S. Prem,1 S. Chakravarty,2 R. Raman,3 D.A. Babu,4 Pratibha,1 S. Nair,2 J. Ram1 1Defence Laboratory Jodhpur, India 2Indian Institute of Science Education and Research, Pune, India 3Solid State Physics Laboratory, Delhi, India 4Defence Metallurgical Research Laboratory, Hyderabad, India [email protected] High anisotropy in eLectricaL conductivity vaLues has resuLted in a good average figure of merit (zT) in textured bismuth-antimony chalcogenide nanomaterials, which have been synthesized by a faciLe bottom-up physicaL synthesis process and consoLidated by direct current hot pressing (DCHP). This zT vaLue is Limited by converseLy high anisotropy in Seebeck coefficient and in thermal conductivity along the ab-plane. Our faciLe bottom-up physicaL synthesis process requires a controLLed meLting of ingredient metals at just above their meLting point-rocking and air quenching. This energy-efficient process does not require any miLLing and produces singLe phase nanomateriaL in ubiquitous plate-like morphology, which easily results in high texturing. This texturing has been studied by XRD anaLysis and SEM images and correLated with texture factor by thermoeLectric measurements. HRTEM image has shown high grain boundary density within the plates. SampLe temperature and Laser power-dependent Raman spectroscopy have reveaLed that Eg(2) mode is dominant phonon transfer modes aLong the textured ab-plane direction. This study shows that scattering of Eg(2) mode phonon shouLd be abLe to further enhance zT in such textured sampLes. ALso, a study of anisotropy in power output density and thereby, engineered power factor under practicaL temperature gradients showed that the effect of anisotropy is much higher than, what can be inferred from the conventionaL power factor anisotropy.