Efficiency-Gain Product Mechanisms of ZnO-Based Nanorod Ultraviolet Photosensors

Chia Hsun Chen; Ching Ting Lee

doi:10.1007/s11664-016-4668-1

Efficiency-Gain Product Mechanisms of ZnO-Based Nanorod Ultraviolet Photosensors

Chia Hsun Chen, Ching Ting Lee

Department of Photonics

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

4 Citations (Scopus)

Abstract

In this work, ZnO-based nanorod ultraviolet photosensors with large efficiency-gain product were obtained using the vapor cooling condensation method. To investigate the physical mechanism of the surface potential variation on the sidewall surface of the ZnO nanorods, the reabsorption rate of oxygen molecules, the Poisson equation, and the characteristic of current versus time under various oxygen ambiences were proposed to calculate the resulting surface potential variation. The results verified that both the oxygen reabsorption rate and the electron–hole recombination probability increased with an increasing oxygen concentration, and led to a decrease of the surface potential variation.

Original language	English
Pages (from-to)	4854-4858
Number of pages	5
Journal	Journal of Electronic Materials
Volume	45
Issue number	10
DOIs	https://doi.org/10.1007/s11664-016-4668-1
Publication status	Published - 2016 Oct 1

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Materials Chemistry

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10.1007/s11664-016-4668-1

Cite this

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title = "Efficiency-Gain Product Mechanisms of ZnO-Based Nanorod Ultraviolet Photosensors",

abstract = "In this work, ZnO-based nanorod ultraviolet photosensors with large efficiency-gain product were obtained using the vapor cooling condensation method. To investigate the physical mechanism of the surface potential variation on the sidewall surface of the ZnO nanorods, the reabsorption rate of oxygen molecules, the Poisson equation, and the characteristic of current versus time under various oxygen ambiences were proposed to calculate the resulting surface potential variation. The results verified that both the oxygen reabsorption rate and the electron–hole recombination probability increased with an increasing oxygen concentration, and led to a decrease of the surface potential variation.",

author = "Chen, {Chia Hsun} and Lee, {Ching Ting}",

note = "Funding Information: This work was supported from the Ministry of Science and Technology, Taiwan, under MOST-103-2221-E-006-002, the National Chung-Shan Institute of Science and Technology, Taiwan, under CSIST-176-V301, the Advanced Optoelectronic Technology Center and the Research Center for Energy Technology and Strategy of the National Cheng Kung University. Publisher Copyright: {\textcopyright} 2016, The Minerals, Metals & Materials Society.",

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doi = "10.1007/s11664-016-4668-1",

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AU - Chen, Chia Hsun

AU - Lee, Ching Ting

N1 - Funding Information: This work was supported from the Ministry of Science and Technology, Taiwan, under MOST-103-2221-E-006-002, the National Chung-Shan Institute of Science and Technology, Taiwan, under CSIST-176-V301, the Advanced Optoelectronic Technology Center and the Research Center for Energy Technology and Strategy of the National Cheng Kung University. Publisher Copyright: © 2016, The Minerals, Metals & Materials Society.

PY - 2016/10/1

Y1 - 2016/10/1

N2 - In this work, ZnO-based nanorod ultraviolet photosensors with large efficiency-gain product were obtained using the vapor cooling condensation method. To investigate the physical mechanism of the surface potential variation on the sidewall surface of the ZnO nanorods, the reabsorption rate of oxygen molecules, the Poisson equation, and the characteristic of current versus time under various oxygen ambiences were proposed to calculate the resulting surface potential variation. The results verified that both the oxygen reabsorption rate and the electron–hole recombination probability increased with an increasing oxygen concentration, and led to a decrease of the surface potential variation.

AB - In this work, ZnO-based nanorod ultraviolet photosensors with large efficiency-gain product were obtained using the vapor cooling condensation method. To investigate the physical mechanism of the surface potential variation on the sidewall surface of the ZnO nanorods, the reabsorption rate of oxygen molecules, the Poisson equation, and the characteristic of current versus time under various oxygen ambiences were proposed to calculate the resulting surface potential variation. The results verified that both the oxygen reabsorption rate and the electron–hole recombination probability increased with an increasing oxygen concentration, and led to a decrease of the surface potential variation.

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Efficiency-Gain Product Mechanisms of ZnO-Based Nanorod Ultraviolet Photosensors

Abstract

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