Systematic conversion of single walled carbon nanotubes into n-type thermoelectric materials by molecular dopants

Yoshiyuki Nonoguchi, Kenji Ohashi, Rui Kanazawa, Koji Ashiba, Kenji Hata, Tetsuya Nakagawa, Chihaya Adachi, Tomoaki Tanase, Tsuyoshi Kawai

Research output: Contribution to journalArticlepeer-review

233 Citations (Scopus)

Abstract

Thermoelectrics is a challenging issue for modern and future energy conversion and recovery technology. Carbon nanotubes are promising active thermoelectic materials owing to their narrow bandgap energy and high charge carrier mobility, and they can be integrated into flexible thermoelectrics that can recover any waste heat. We here report air-stable n-type single walled carbon nanotubes with a variety of weak electron donors in the range of HOMO level between ca.-4.4eV and ca.-5.6eV, in which partial uphill electron injection from the dopant to the conduction band of single walled carbon nanotubes is dominant. We display flexible films of the doped single walled carbon nanotubes possessing significantly large thermoelectric effect, which is applicable to flexible ambient thermoelectric modules.

Original languageEnglish
Article number3344
JournalScientific reports
Volume3
DOIs
Publication statusPublished - 2013

All Science Journal Classification (ASJC) codes

  • General

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