Chemical Synthesis of Bulk Thermoelectric Materials with Superlattice Structures

2015 Fiscal Year Final Research Report

• Project/Area Number: 25289226
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: Toyota Physical and Chemical Research Institute (2014-2015); Nagoya University (2013)
• Principal Investigator: Koumoto Kunihito 公益財団法人豊田理化学研究所, その他部局等, フェロー (30133094)
• Co-Investigator(Kenkyū-buntansha): WAN Chunlei 名古屋大学, 大学院工学研究科, 助教 (10641441)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 熱電変換材料 / 超格子

Outline of Final Research Achievements

Synthetic process to obtain large-area films or fois of TiS2/organic hybrid superlattice materials through mechanical intercalation, liquid-exfoliation, and self-assembly of nanosheets.The resulting films or foils are extremely flexible and were found to exhibit higher thermoelectric performance than pristine TiS2 single crystals. A prototype of thin-film thermoelectric device was constructed by combining our newly developed n-type material with p-type organic material, PEDOT:PSS, and it's power generation characteristics was found to be improved compared to a p-type unileg device. In contrast, drastic improvement in thermoelectric performance of SrTiO3 (STO) materials was not achieved, though we succeeded in constructing 3D superlattice ceramics by self-assembling STO nanocubes with Nb-doped surfaces.

Free Research Field

無機材料化学