Photoconductive enhancement of single-layer Tin oxide-coated ZnO nanowires

Chin Ching Lin; Yu Wei Chen; Mei Ching Chiang; Chia Hua Lee; Yung Liang Tung; San-Yuan Chen

doi:10.1149/1.3271100

Photoconductive enhancement of single-layer Tin oxide-coated ZnO nanowires

Chin Ching Lin^*, Yu Wei Chen, Mei Ching Chiang, Chia Hua Lee, Yung Liang Tung, San-Yuan Chen

^*Corresponding author for this work

Department of Materials Science and Engineering

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

19 Scopus citations

Abstract

In this study, zinc oxide nanowires (ZnO NWs) coated with crystalline tin oxide (SnO₂) by an ultrasonic spray pyrolysis were investigated. High resolution transmission electron microscopy analysis confirms that a continuous single SnO₂ layer of about 10 nm has been coated on the ZnO NWs. Photoconductivity measurements revealed that the ZnO NWs coated with the single uniform SnO₂ layer had a higher photoconductivity ratio by about a factor of 8 compared to the pristine ZnO NWs, attributed to the multi-photoexcited electrons. Under a steady radiation of UV light (λ=325 nm), a substantial increase in the steady-state photocurrent is noticeable, suggesting that extra photoinduced charges are transferred from SnO₂ to ZnO NWs.

Original language	English
Journal	Journal of the Electrochemical Society
Volume	157
Issue number	2
DOIs	https://doi.org/10.1149/1.3271100
State	Published - 15 Jan 2010

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abstract = "In this study, zinc oxide nanowires (ZnO NWs) coated with crystalline tin oxide (SnO2) by an ultrasonic spray pyrolysis were investigated. High resolution transmission electron microscopy analysis confirms that a continuous single SnO2 layer of about 10 nm has been coated on the ZnO NWs. Photoconductivity measurements revealed that the ZnO NWs coated with the single uniform SnO2 layer had a higher photoconductivity ratio by about a factor of 8 compared to the pristine ZnO NWs, attributed to the multi-photoexcited electrons. Under a steady radiation of UV light (λ=325 nm), a substantial increase in the steady-state photocurrent is noticeable, suggesting that extra photoinduced charges are transferred from SnO2 to ZnO NWs.",

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AU - Lin, Chin Ching

AU - Chen, Yu Wei

AU - Chiang, Mei Ching

AU - Lee, Chia Hua

AU - Tung, Yung Liang

AU - Chen, San-Yuan

PY - 2010/1/15

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N2 - In this study, zinc oxide nanowires (ZnO NWs) coated with crystalline tin oxide (SnO2) by an ultrasonic spray pyrolysis were investigated. High resolution transmission electron microscopy analysis confirms that a continuous single SnO2 layer of about 10 nm has been coated on the ZnO NWs. Photoconductivity measurements revealed that the ZnO NWs coated with the single uniform SnO2 layer had a higher photoconductivity ratio by about a factor of 8 compared to the pristine ZnO NWs, attributed to the multi-photoexcited electrons. Under a steady radiation of UV light (λ=325 nm), a substantial increase in the steady-state photocurrent is noticeable, suggesting that extra photoinduced charges are transferred from SnO2 to ZnO NWs.

AB - In this study, zinc oxide nanowires (ZnO NWs) coated with crystalline tin oxide (SnO2) by an ultrasonic spray pyrolysis were investigated. High resolution transmission electron microscopy analysis confirms that a continuous single SnO2 layer of about 10 nm has been coated on the ZnO NWs. Photoconductivity measurements revealed that the ZnO NWs coated with the single uniform SnO2 layer had a higher photoconductivity ratio by about a factor of 8 compared to the pristine ZnO NWs, attributed to the multi-photoexcited electrons. Under a steady radiation of UV light (λ=325 nm), a substantial increase in the steady-state photocurrent is noticeable, suggesting that extra photoinduced charges are transferred from SnO2 to ZnO NWs.

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Photoconductive enhancement of single-layer Tin oxide-coated ZnO nanowires

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