1. P-N junction with donor and acceptor encapsulated single-walled carbon nanotubes.
- Author
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Kato, Toshiaki, Hatakeyama, Rikizo, Shishido, Jun, Oohara, Wataru, and Tohji, Kazuyuki
- Subjects
HETEROJUNCTIONS ,ELECTRON donor-acceptor complexes ,CARBON nanotubes ,QUANTUM tunneling ,MATERIALS at low temperatures ,HUMAN ecology education - Abstract
Ultimate one-dimensional heterojunctions of electron donor and acceptor materials have been realized within the inner hollow space of a single-walled carbon nanotube (SWNT). The heterojunction structures of Cs/I and Cs/C
60 inside SWNTs (Cs/I@SWNTs, Cs/C60 @SWNTs) yield the air-stable rectifying performance. Clear tunneling currents through the p-n junction barrier could be also detected only for Cs/I@SWNTs, which is explained by the difference of depletion layer structures. Based on a potential calculation, symmetrical and asymmetrical depletion layers were found to be formed in Cs/I@SWNTs and Cs/C60 @SWNTs, respectively. Low temperature measurements also supply evidence of asymmetric depletion layer formation in Cs/C60 @SWNTs. [ABSTRACT FROM AUTHOR]- Published
- 2009
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