In:
Applied Physics Letters, AIP Publishing, Vol. 100, No. 25 ( 2012-06-18)
Kurzfassung:
A structure for visible photosensors based on double-walled carbon nanotube (DWCNT) film/Cu2O nanoparticle (NP) film/TiO2 nanotube array (TNA) heterojunctions has been fabricated. Cu2O nanoparticles reduce dark current and enhance photoresponse of the heterojunctions. Consequently, the optoelectric performance is significantly enhanced compared to that of the heterojunctions without Cu2O nanoparticles. The photocurrent-to-dark current ratio reaches ∼1 × 104 under illumination at 405 nm and ∼3 × 104 under illumination at 532 nm, which is two orders of magnitude higher than the results of double-walled carbon nanotube film/TiO2 nanotube array heterojunctions under the same illumination density. Moreover, the response speed of the heterojunctions is greatly improved.
Materialart:
Online-Ressource
ISSN:
0003-6951
,
1077-3118
Sprache:
Englisch
Verlag:
AIP Publishing
Publikationsdatum:
2012
ZDB Id:
211245-0
ZDB Id:
1469436-0