Single nanowire-based UV photodetectors for fast switching
<p>Abstract</p> <p>Relatively long (30 µm) high quality ZnO nanowires (NWs) were grown by the vapor-liquid-solid (VLS) technique. Schottky diodes of single NW were fabricated by putting single ZnO NW across Au and Pt electrodes. A device with ohmic contacts at both the sid...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2011-01-01
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| Series: | Nanoscale Research Letters |
| Online Access: | http://www.nanoscalereslett.com/content/6/1/348 |
| _version_ | 1797711607003873280 |
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| author | Lu Jun ul Hasan Kamran Alvi N H Nur O Willander Magnus |
| author_facet | Lu Jun ul Hasan Kamran Alvi N H Nur O Willander Magnus |
| author_sort | Lu Jun |
| collection | DOAJ |
| description | <p>Abstract</p> <p>Relatively long (30 µm) high quality ZnO nanowires (NWs) were grown by the vapor-liquid-solid (VLS) technique. Schottky diodes of single NW were fabricated by putting single ZnO NW across Au and Pt electrodes. A device with ohmic contacts at both the sides was also fabricated for comparison. The current-voltage (<it>I</it>-<it>V</it>) measurements for the Schottky diode show clear rectifying behavior and no reverse breakdown was seen down to -5 V. High current was observed in the forward bias and the device was found to be stable up to 12 V applied bias. The Schottky barrier device shows more sensitivity, lower dark current, and much faster switching under pulsed UV illumination. Desorption and re-adsorption of much smaller number of oxygen ions at the Schottky junction effectively alters the barrier height resulting in a faster response even for very long NWs. The NW was treated with oxygen plasma to improve the switching. The photodetector shows high stability, reversibility, and sensitivity to UV light. The results imply that single ZnO NW Schottky diode is a promising candidate for fabricating UV photodetectors.</p> |
| first_indexed | 2024-03-12T07:08:28Z |
| format | Article |
| id | doaj.art-c7b670c2d3b640b1964c4249af50bebd |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T07:08:28Z |
| publishDate | 2011-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-c7b670c2d3b640b1964c4249af50bebd2023-09-02T23:16:32ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2011-01-0161348Single nanowire-based UV photodetectors for fast switchingLu Junul Hasan KamranAlvi N HNur OWillander Magnus<p>Abstract</p> <p>Relatively long (30 µm) high quality ZnO nanowires (NWs) were grown by the vapor-liquid-solid (VLS) technique. Schottky diodes of single NW were fabricated by putting single ZnO NW across Au and Pt electrodes. A device with ohmic contacts at both the sides was also fabricated for comparison. The current-voltage (<it>I</it>-<it>V</it>) measurements for the Schottky diode show clear rectifying behavior and no reverse breakdown was seen down to -5 V. High current was observed in the forward bias and the device was found to be stable up to 12 V applied bias. The Schottky barrier device shows more sensitivity, lower dark current, and much faster switching under pulsed UV illumination. Desorption and re-adsorption of much smaller number of oxygen ions at the Schottky junction effectively alters the barrier height resulting in a faster response even for very long NWs. The NW was treated with oxygen plasma to improve the switching. The photodetector shows high stability, reversibility, and sensitivity to UV light. The results imply that single ZnO NW Schottky diode is a promising candidate for fabricating UV photodetectors.</p>http://www.nanoscalereslett.com/content/6/1/348 |
| spellingShingle | Lu Jun ul Hasan Kamran Alvi N H Nur O Willander Magnus Single nanowire-based UV photodetectors for fast switching Nanoscale Research Letters |
| title | Single nanowire-based UV photodetectors for fast switching |
| title_full | Single nanowire-based UV photodetectors for fast switching |
| title_fullStr | Single nanowire-based UV photodetectors for fast switching |
| title_full_unstemmed | Single nanowire-based UV photodetectors for fast switching |
| title_short | Single nanowire-based UV photodetectors for fast switching |
| title_sort | single nanowire based uv photodetectors for fast switching |
| url | http://www.nanoscalereslett.com/content/6/1/348 |
| work_keys_str_mv | AT lujun singlenanowirebaseduvphotodetectorsforfastswitching AT ulhasankamran singlenanowirebaseduvphotodetectorsforfastswitching AT alvinh singlenanowirebaseduvphotodetectorsforfastswitching AT nuro singlenanowirebaseduvphotodetectorsforfastswitching AT willandermagnus singlenanowirebaseduvphotodetectorsforfastswitching |