journal article·2019-06-25Open access

Tuning Transport Properties in Thermoelectric Nanocomposites through Inorganic Ligands and Heterostructured Building Blocks

Maria Ibáñez, Aziz Genç, Roger Hasler, Yu Liu, Oleksandr Dobrozhan, Olga Nazarenko, María de la Mata, Jordi Arbiol, Andreu Cabot, Maksym V. Kovalenko

ACS Nano· Volume 13· Issue 6

Abstract

Methodologies that involve the use of nanoparticles as "artificial atoms" to rationally build materials in a bottom-up fashion are particularly well-suited to control the matter at the nanoscale. Colloidal synthetic routes allow for an exquisite control over such "artificial atoms" in terms of size, shape, and crystal phase as well as core and surface compositions. We present here a bottom-up approach to produce Pb-Ag-K-S-Te nanocomposites, which is a highly promising system for thermoelectric energy conversion. First, we developed a high-yield and scalable colloidal synthesis route to uniform lead sulfide (PbS) nanorods, whose tips are made of silver sulfide (Ag2S). We then took advantage of the large surface-to-volume ratio to introduce a p-type dopant (K) by replacing native organic ligands with K2Te. Upon thermal consolidation, K2Te-surface modified PbS-Ag2S nanorods yield p-type doped nanocomposites with PbTe and PbS as major phases and Ag2S and Ag2Te as embedded nanoinclusions. Thermoelectric characterization of such consolidated nanosolids showed a high thermoelectric figure-of-merit of 1 at 620 K.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Thermal properties of materials · Advanced Battery Materials and Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Science and Technology Austria, Am Campus 1, 3400 Klosterneuburg, Austria

Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir Prelog Weg 1, Zürich CH-8093, Switzerland

Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf CH-8600, Switzerland

Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST), Campus UAB, Bellaterra, 08193 Barcelona, Catalonia, Spain

Department of Metallurgy and Materials Engineering, Faculty of Engineering, Bartin University, 74100 Bartin, Turkey

Catalonia Energy Research Institute - IREC, Sant Adria del Besos, 08930 Barcelona, Spain

Departamento de Ciencia de los Materiales, Ing. Met. y Qca.Inorg., IMEYMAT, Universidad de Cádiz, 11510 Puerto Real, Spain

ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain

Funding

Eidgen?ssische Technische Hochschule Z?rich · H2020 Marie Sklodowska-Curie Actions · Generalitat de Catalunya · FP7 Ideas: European Research Council · Institute of Science and Technology Austria

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