CdTe microwire-based ultraviolet photodetectors aligned by a non-uniform electric field

Hyunik Park; Gwangseok Yang; Seungju Chun; Donghwan Kim; Jihyun Kim

doi:10.1063/1.4816780

CdTe microwire-based ultraviolet photodetectors aligned by a non-uniform electric field

Hyunik Park, Gwangseok Yang, Seungju Chun, Donghwan Kim, Jihyun Kim

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

14 Citations (Scopus)

Abstract

We report on ultraviolet (UV) photodetectors fabricated by positioning Cadmium Telluride (CdTe) microwires (μWs) precisely by dielectrophoretic (DEP) force, where CdTe μWs were grown using an Au-catalyst-assisted closed-space-sublimation (CSS) method. The optical properties of CSS-grown CdTe μWs were characterized by micro-photoluminescence and micro-Raman spectroscopies. Optoelectronic characteristics were obtained after CdTe μWs were aligned on a pre-patterned SiO₂/Si substrate by a non-uniform electric field. Photocurrents were increased with increasing the light intensities. Fast and reliable photoresponse and recovery were observed when CdTe μWs were exposed to UV illuminations. We demonstrated that high quality CdTe μWs grown by the CSS method have significant potentials as optoelectronic devices.

Original language	English
Article number	051906
Journal	Applied Physics Letters
Volume	103
Issue number	5
DOIs	https://doi.org/10.1063/1.4816780
Publication status	Published - 2013 Jul 29

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "CdTe microwire-based ultraviolet photodetectors aligned by a non-uniform electric field",

abstract = "We report on ultraviolet (UV) photodetectors fabricated by positioning Cadmium Telluride (CdTe) microwires (μWs) precisely by dielectrophoretic (DEP) force, where CdTe μWs were grown using an Au-catalyst-assisted closed-space-sublimation (CSS) method. The optical properties of CSS-grown CdTe μWs were characterized by micro-photoluminescence and micro-Raman spectroscopies. Optoelectronic characteristics were obtained after CdTe μWs were aligned on a pre-patterned SiO2/Si substrate by a non-uniform electric field. Photocurrents were increased with increasing the light intensities. Fast and reliable photoresponse and recovery were observed when CdTe μWs were exposed to UV illuminations. We demonstrated that high quality CdTe μWs grown by the CSS method have significant potentials as optoelectronic devices.",

author = "Hyunik Park and Gwangseok Yang and Seungju Chun and Donghwan Kim and Jihyun Kim",

note = "Funding Information: This research was supported by a Human Resources Development grant from the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Knowledge Economy (Grant No. 20104010100640), a Korea University Grant, Basic Science Research Program through the National Research Foundation of Korea (NRF) (No. 2012R1A1A2042761), and the Center for Inorganic Photovoltaic Materials (No. 2012-0001171) grant funded by the Korea government (MSIP).",

year = "2013",

month = jul,

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doi = "10.1063/1.4816780",

language = "English",

volume = "103",

journal = "Applied Physics Letters",

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T1 - CdTe microwire-based ultraviolet photodetectors aligned by a non-uniform electric field

AU - Park, Hyunik

AU - Yang, Gwangseok

AU - Chun, Seungju

AU - Kim, Donghwan

AU - Kim, Jihyun

N1 - Funding Information: This research was supported by a Human Resources Development grant from the Korea Institute of Energy Technology Evaluation and Planning (KETEP) funded by the Ministry of Knowledge Economy (Grant No. 20104010100640), a Korea University Grant, Basic Science Research Program through the National Research Foundation of Korea (NRF) (No. 2012R1A1A2042761), and the Center for Inorganic Photovoltaic Materials (No. 2012-0001171) grant funded by the Korea government (MSIP).

PY - 2013/7/29

Y1 - 2013/7/29

N2 - We report on ultraviolet (UV) photodetectors fabricated by positioning Cadmium Telluride (CdTe) microwires (μWs) precisely by dielectrophoretic (DEP) force, where CdTe μWs were grown using an Au-catalyst-assisted closed-space-sublimation (CSS) method. The optical properties of CSS-grown CdTe μWs were characterized by micro-photoluminescence and micro-Raman spectroscopies. Optoelectronic characteristics were obtained after CdTe μWs were aligned on a pre-patterned SiO2/Si substrate by a non-uniform electric field. Photocurrents were increased with increasing the light intensities. Fast and reliable photoresponse and recovery were observed when CdTe μWs were exposed to UV illuminations. We demonstrated that high quality CdTe μWs grown by the CSS method have significant potentials as optoelectronic devices.

AB - We report on ultraviolet (UV) photodetectors fabricated by positioning Cadmium Telluride (CdTe) microwires (μWs) precisely by dielectrophoretic (DEP) force, where CdTe μWs were grown using an Au-catalyst-assisted closed-space-sublimation (CSS) method. The optical properties of CSS-grown CdTe μWs were characterized by micro-photoluminescence and micro-Raman spectroscopies. Optoelectronic characteristics were obtained after CdTe μWs were aligned on a pre-patterned SiO2/Si substrate by a non-uniform electric field. Photocurrents were increased with increasing the light intensities. Fast and reliable photoresponse and recovery were observed when CdTe μWs were exposed to UV illuminations. We demonstrated that high quality CdTe μWs grown by the CSS method have significant potentials as optoelectronic devices.

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VL - 103

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 5

M1 - 051906

ER -

CdTe microwire-based ultraviolet photodetectors aligned by a non-uniform electric field

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