Detection of CO using bulk ZnO Schottky rectifiers

B. S. Kang; S. Kim; F. Ren; K. Ip; Y. W. Heo; B. P. Gila; C. R. Abernathy; D. P. Norton; S. J. Pearton

doi:10.1007/s00339-004-2666-2

Detection of CO using bulk ZnO Schottky rectifiers

B. S. Kang, S. Kim, F. Ren, K. Ip, Y. W. Heo, B. P. Gila, C. R. Abernathy, D. P. Norton, S. J. Pearton

University of Florida

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

10 Scopus citations

Abstract

Bulk Pt/ZnO Schottky rectifiers show gas sensitivities for CO of 4% and 8%, respectively, at 150°C for 1 and 10% CO in N². The current or voltage changes are time dependent, with an activation energy of 40.7 kJ mol^-1. Over a limited range of partial pressures of CO (P _CO) in the ambient gas, the on-state resistance R of the sensor at fixed bias voltage decreased according to R = (R_O + A(P _CO)^0.5)^-1. where A is a constant and R _O is the resistance in N₂. Since these devices are also sensitive to H₂ and C₂H₄, the ZnO rectifiers appear promising for a range of gas-sensing applications.

Original language	English
Pages (from-to)	259-261
Number of pages	3
Journal	Applied Physics A: Materials Science and Processing
Volume	80
Issue number	2
DOIs	https://doi.org/10.1007/s00339-004-2666-2
State	Published - Feb 2005

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abstract = "Bulk Pt/ZnO Schottky rectifiers show gas sensitivities for CO of 4% and 8%, respectively, at 150°C for 1 and 10% CO in N2. The current or voltage changes are time dependent, with an activation energy of 40.7 kJ mol-1. Over a limited range of partial pressures of CO (P CO) in the ambient gas, the on-state resistance R of the sensor at fixed bias voltage decreased according to R = (RO + A(P CO)0.5)-1. where A is a constant and R O is the resistance in N2. Since these devices are also sensitive to H2 and C2H4, the ZnO rectifiers appear promising for a range of gas-sensing applications.",

author = "Kang, {B. S.} and S. Kim and F. Ren and K. Ip and Heo, {Y. W.} and Gila, {B. P.} and Abernathy, {C. R.} and Norton, {D. P.} and Pearton, {S. J.}",

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AU - Kang, B. S.

AU - Kim, S.

AU - Ren, F.

AU - Ip, K.

AU - Heo, Y. W.

AU - Gila, B. P.

AU - Abernathy, C. R.

AU - Norton, D. P.

AU - Pearton, S. J.

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AB - Bulk Pt/ZnO Schottky rectifiers show gas sensitivities for CO of 4% and 8%, respectively, at 150°C for 1 and 10% CO in N2. The current or voltage changes are time dependent, with an activation energy of 40.7 kJ mol-1. Over a limited range of partial pressures of CO (P CO) in the ambient gas, the on-state resistance R of the sensor at fixed bias voltage decreased according to R = (RO + A(P CO)0.5)-1. where A is a constant and R O is the resistance in N2. Since these devices are also sensitive to H2 and C2H4, the ZnO rectifiers appear promising for a range of gas-sensing applications.

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Detection of CO using bulk ZnO Schottky rectifiers

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