A supersensitive, ultrafast, and broadband light-harvesting scheme employing carbon nanotube/tio 2 core-shell nanowire geometry

Chia Yang Hsu, Der Hsien Lien, Jr-Hau He*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We demonstrate a novel, feasible strategy on practical application of one-dimensional photodetectors by integrating carbon nanotube and TiO 2 in a core-shell fashion for breaking the compromise between the photogain and the response/recovery speed. Radial Schottky barriers between carbon nanotube cores and TiO 2 shells and surface states at TiO 2 shell surface regulate electron transport and also facilitate the separation of photo-generated electrons and holes, leading to ultrahigh photogain (G = 1.4×104) and the ultrashort response/recovery times (4.3/10.2 ms). Additionally, radial Schottky junction and defect band absorption broaden the detection range (UV-visible). The concept using metallic core-oxide shell geometry with radial Schottky barriers holds potential to paves a new way to realize nanostructured photodetectors in a practical use.

Original languageEnglish (US)
Title of host publicationNanophotonics, Nanoelectronics and Nanosensor, N3 2013
StatePublished - Nov 21 2013
EventNanophotonics, Nanoelectronics and Nanosensor, N3 2013 - Wuhan, China
Duration: May 25 2013May 26 2013

Publication series

NameNanophotonics, Nanoelectronics and Nanosensor, N3 2013

Other

OtherNanophotonics, Nanoelectronics and Nanosensor, N3 2013
CountryChina
CityWuhan
Period05/25/1305/26/13

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics

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