UV photodetector fabricated using a single ZnO nanobelt (NB) has shown a photoresponse enhancement up to 750 times higher than that of a bare ZnO NB after coating with ∼20 nm plasma polymerized acrylonitrile (PP-AN) nanoscale film. The mechanism for this colossal photoconductivity is suggested as a consequence of the efficient exciton dissociation under UV illumination due to enhanced electron transfer from valence band of ZnO NB to the PP-AN and then back to the conduction band of ZnO. This process has demonstrated an easy and effective method for improving the performance of the nanowireNB-based devices, possibly leading to supersensitive UV detector for applications in imaging, photosensing, and intrachip optical interconnects.
|Original language||English (US)|
|Journal||Journal of Applied Physics|
|State||Published - 2007|
Bibliographical noteFunding Information:
This work was supported in part by the National Heart Lung and Blood Institute of the NIH as a Program of Excellence in Nanotechnology (1U01HL80711 to G.B.) and by the National Cancer Institute of the NIH as a Center of Cancer Nanotechnology Excellence (5U54CA119338 to G.B. and Z.L.W.). The authors thank T. J. Bunning, H. Jiang, and J. O. Enlow (AFRL) for technical assistance.
ASJC Scopus subject areas
- Physics and Astronomy(all)