Details

Autor(en) / Beteiligte

• MacLeod, Bradley A.
• Stanton, Noah J.
• Gould, Isaac E.
• Wesenberg, Devin
• Ihly, Rachelle
• Owczarczyk, Zbyslaw R.
• Hurst, Katherine E.
• Fewox, Christopher S.
• Folmar, Christopher N.
• Holman Hughes, Katherine
• Zink, Barry L.
• Blackburn, Jeffrey L.
• Ferguson, Andrew J.

Titel

Large n- and p-type thermoelectric power factors from doped semiconducting single-walled carbon nanotube thin films

Ist Teil von

• Energy & environmental science, 2017-10, Vol.10 (10), p.2168-2179

Ort / Verlag

United States: Royal Society of Chemistry

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Lightweight, robust, and flexible single-walled carbon nanotube (SWCNT) materials can be processed inexpensively using solution-based techniques, similar to other organic semiconductors. In contrast to many semiconducting polymers, semiconducting SWCNTs (s-SWCNTs) represent unique one-dimensional organic semiconductors with chemical and physical properties that facilitate equivalent transport of electrons and holes. These factors have driven increasing attention to employing s-SWCNTs for electronic and energy harvesting applications, including thermoelectric (TE) generators. Here we demonstrate a combination of ink chemistry, solid-state polymer removal, and charge-transfer doping strategies that enable unprecedented n-type and p-type TE power factors, in the range of 700 μW m −1 K −2 at 298 K for the same solution-processed highly enriched thin films containing 100% s-SWCNTs. We also demonstrate that the thermal conductivity appears to decrease with decreasing s-SWCNT diameter, leading to a peak material zT ≈ 0.12 for s-SWCNTs with diameters in the range of 1.0 nm. Our results indicate that the TE performance of s-SWCNT-only material systems is approaching that of traditional inorganic semiconductors, paving the way for these materials to be used as the primary components for efficient, all-organic TE generators.