Suchergebnisse

We present a method to dissolve carbon nanotubes that simultaneously allows to prepare n-doped films. These films are composed of thinner bundles of longer tubes when compared to films prepared using surfactants and sonication. Their negative Seebeck coefficient and high electrical conductivity make them good candidates for thermoelectric applications. We investigate their stability in air by aging them at elevated temperatures, showing stabilities over 500 h, which is further improved by the use of crown ethers. Finally, we demonstrate the usefulness of the prepared materials by fabricating an organic thermoelectric generator comprising 40 legs. ; The authors acknowledge financial support from the Spanish Ministry of Science and Innovation through the "Severo Ochoa" Program for Centers of Excellence in R&D (No. CEX2019-000917-S), Nos. PGC2018-095411-B-I00 and MAT2017-90024-P (TANGENTS)-EI/FEDER; from the Generalitat de Catalunya and European Union (FEDER) through AGAUR 2018 PROD 00191; and from the European Research Council (ERC) under Grant Agreement No. 648901. We also thank Professor Alejandro R. Goñi (ICMAB) for fruitful discussions. ; Peer reviewed