UV-activated room-temperature gas sensing mechanism of polycrystalline ZnO

Shan Wei Fan; Arvind K. Srivastava; Vinayak P. Dravid

doi:10.1063/1.3243458

UV-activated room-temperature gas sensing mechanism of polycrystalline ZnO

Shan Wei Fan^*, Arvind K. Srivastava, Vinayak P. Dravid

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

262 Scopus citations

Abstract

The effects of UV illumination on the electronic properties and gas sensing performance of ZnO are reported. It is found that UV light improves the sensitivity and the sensor response and recovery rate. By investigating the photoresponse behavior of ZnO, we observe that the electrons generated by UV light promote the adsorption of oxygen and form the photoinduced oxygen ions [O^2- (h_v)]. These ions [O^2- (h_v)] are responsible for the room-temperature gas sensing phenomena and promise enhanced sensor performance through further optimization.

Original language	English (US)
Article number	142106
Journal	Applied Physics Letters
Volume	95
Issue number	14
DOIs	https://doi.org/10.1063/1.3243458
State	Published - 2009

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.3243458

Cite this

@article{6de48e3f98c94dc593b099793d721bbc,

title = "UV-activated room-temperature gas sensing mechanism of polycrystalline ZnO",

abstract = "The effects of UV illumination on the electronic properties and gas sensing performance of ZnO are reported. It is found that UV light improves the sensitivity and the sensor response and recovery rate. By investigating the photoresponse behavior of ZnO, we observe that the electrons generated by UV light promote the adsorption of oxygen and form the photoinduced oxygen ions [O2- (hv)]. These ions [O2- (hv)] are responsible for the room-temperature gas sensing phenomena and promise enhanced sensor performance through further optimization.",

author = "Fan, {Shan Wei} and Srivastava, {Arvind K.} and Dravid, {Vinayak P.}",

note = "Funding Information: This research work was primarily supported by U.S.-DOE Award No. DE-FG02-07ER46444. The sensor experimental setup and software/hardware development was initially supported by NSF-NSEC Award No. EEC-0647560. The research was performed in the EPIC facility of NUANCE Center at Northwestern University. NUANCE Center is supported by NSF-NSEC, NSF-MRSEC, Keck Foundation, the State of Illinois, and Northwestern University.",

year = "2009",

doi = "10.1063/1.3243458",

language = "English (US)",

volume = "95",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "14",

}

TY - JOUR

T1 - UV-activated room-temperature gas sensing mechanism of polycrystalline ZnO

AU - Fan, Shan Wei

AU - Srivastava, Arvind K.

AU - Dravid, Vinayak P.

N1 - Funding Information: This research work was primarily supported by U.S.-DOE Award No. DE-FG02-07ER46444. The sensor experimental setup and software/hardware development was initially supported by NSF-NSEC Award No. EEC-0647560. The research was performed in the EPIC facility of NUANCE Center at Northwestern University. NUANCE Center is supported by NSF-NSEC, NSF-MRSEC, Keck Foundation, the State of Illinois, and Northwestern University.

PY - 2009

Y1 - 2009

N2 - The effects of UV illumination on the electronic properties and gas sensing performance of ZnO are reported. It is found that UV light improves the sensitivity and the sensor response and recovery rate. By investigating the photoresponse behavior of ZnO, we observe that the electrons generated by UV light promote the adsorption of oxygen and form the photoinduced oxygen ions [O2- (hv)]. These ions [O2- (hv)] are responsible for the room-temperature gas sensing phenomena and promise enhanced sensor performance through further optimization.

AB - The effects of UV illumination on the electronic properties and gas sensing performance of ZnO are reported. It is found that UV light improves the sensitivity and the sensor response and recovery rate. By investigating the photoresponse behavior of ZnO, we observe that the electrons generated by UV light promote the adsorption of oxygen and form the photoinduced oxygen ions [O2- (hv)]. These ions [O2- (hv)] are responsible for the room-temperature gas sensing phenomena and promise enhanced sensor performance through further optimization.

UR - http://www.scopus.com/inward/record.url?scp=70349922960&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70349922960&partnerID=8YFLogxK

U2 - 10.1063/1.3243458

DO - 10.1063/1.3243458

M3 - Article

AN - SCOPUS:70349922960

VL - 95

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 14

M1 - 142106

ER -

UV-activated room-temperature gas sensing mechanism of polycrystalline ZnO

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this