Broad spectral response using carbon nanotube/organic semiconductor/C60 photodetectors.
Nano Lett
; 9(9): 3354-8, 2009 Sep.
Article
em En
| MEDLINE
| ID: mdl-19637853
We demonstrate that photogenerated excitons in semiconducting carbon nanotubes (CNTs) can be efficiently dissociated by forming a planar heterojunction between CNTs wrapped in semiconducting polymers and the electron acceptor, C(60). Illumination of the CNTs at their near-infrared optical band gap results in the generation of a short-circuit photocurrent with peak external and internal quantum efficiencies of 2.3% and 44%, respectively. Using soft CNT-hybrid materials systems combining semiconducting small molecules and polymers, we have fabricated broad-band photodetectors with a specific detectivity >10(10) cm Hz(1/2) W(1-) from lambda = 400 to 1450 nm and a response time of tau = 7.2 +/- 0.2 ns.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Polímeros
/
Nanotecnologia
/
Fulerenos
/
Nanotubos de Carbono
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article