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

doi:10.1364/n3.2013.nsa3a.28

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: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-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 language	English
Title of host publication	International Photonics and Optoelectronics Meetings (POEM)
Publisher	OSA publishing
ISBN (Electronic)	9781557529763
DOIs	https://doi.org/10.1364/n3.2013.nsa3a.28
Publication status	Published - May 2013
Externally published	Yes
Event	Nanophotonics, Nanoelectronics and Nanosensor, N3 2013 - Wuhan, China Duration: 25 May 2013 → 26 May 2013

Publication series

Name	Nanophotonics, Nanoelectronics and Nanosensor, N3 2013

Conference

Conference	Nanophotonics, Nanoelectronics and Nanosensor, N3 2013
Place	China
City	Wuhan
Period	25/05/13 → 26/05/13

Research Keywords

Core-shell
TiO2
Carbon nanotube
Photodetector
Photoresponse time

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Cite this

@inproceedings{f206615363064d77b261d78025f5c23c,

title = "A Supersensitive, Ultrafast, and Broadband Light-Harvesting Scheme Employing Carbon Nanotube/TiO2 Core-Shell Nanowire Geometry",

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.",

keywords = "Core-shell, TiO2, Carbon nanotube, Photodetector, Photoresponse time",

author = "Chia-Yang Hsu and Der-Hsien Lien and Jr-Hau He",

year = "2013",

month = may,

doi = "10.1364/n3.2013.nsa3a.28",

language = "English",

series = "Nanophotonics, Nanoelectronics and Nanosensor, N3 2013",

publisher = "OSA publishing",

booktitle = "International Photonics and Optoelectronics Meetings (POEM)",

note = "Nanophotonics, Nanoelectronics and Nanosensor, N3 2013 ; Conference date: 25-05-2013 Through 26-05-2013",

}

Hsu, C-Y, Lien, D-H & He, J-H 2013, A Supersensitive, Ultrafast, and Broadband Light-Harvesting Scheme Employing Carbon Nanotube/TiO₂ Core-Shell Nanowire Geometry. in International Photonics and Optoelectronics Meetings (POEM)., NSa3A.28, Nanophotonics, Nanoelectronics and Nanosensor, N3 2013, OSA publishing, Nanophotonics, Nanoelectronics and Nanosensor, N3 2013, Wuhan, China, 25/05/13. https://doi.org/10.1364/n3.2013.nsa3a.28

A Supersensitive, Ultrafast, and Broadband Light-Harvesting Scheme Employing Carbon Nanotube/TiO₂ Core-Shell Nanowire Geometry. / Hsu, Chia-Yang; Lien, Der-Hsien; He, Jr-Hau.
International Photonics and Optoelectronics Meetings (POEM). OSA publishing, 2013. NSa3A.28 (Nanophotonics, Nanoelectronics and Nanosensor, N3 2013).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - A Supersensitive, Ultrafast, and Broadband Light-Harvesting Scheme Employing Carbon Nanotube/TiO2 Core-Shell Nanowire Geometry

AU - Hsu, Chia-Yang

AU - Lien, Der-Hsien

AU - He, Jr-Hau

PY - 2013/5

Y1 - 2013/5

N2 - 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.

AB - 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.

KW - Core-shell

KW - TiO2

KW - Carbon nanotube

KW - Photodetector

KW - Photoresponse time

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DO - 10.1364/n3.2013.nsa3a.28

M3 - RGC 32 - Refereed conference paper (with host publication)

T3 - Nanophotonics, Nanoelectronics and Nanosensor, N3 2013

BT - International Photonics and Optoelectronics Meetings (POEM)

PB - OSA publishing

T2 - Nanophotonics, Nanoelectronics and Nanosensor, N3 2013

Y2 - 25 May 2013 through 26 May 2013

ER -