A supersensitive, ultrafast, and broadband light-harvesting scheme employing carbon nanotube/tio2 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 TiO2 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 TiO2 shells and surface states at TiO2 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
Title of host publicationNanophotonics, Nanoelectronics and Nanosensor, N3 2013
PublisherOptical Society of America (OSA)
PagesNSa3A.28
ISBN (Print)9781557529763
DOIs
StatePublished - 2013
EventNanophotonics, Nanoelectronics and Nanosensor, N3 2013 - Wuhan, China
Duration: 25 May 201326 May 2013

Publication series

NameNanophotonics, Nanoelectronics and Nanosensor, N3 2013

Conference

ConferenceNanophotonics, Nanoelectronics and Nanosensor, N3 2013
CountryChina
CityWuhan
Period25/05/1326/05/13

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