Grown and Characterization of ZnO Aligned Nanorod Arrays for Sensor Applications
ZnO nanorods are promising materials for many applications, in particular for UV detectors. In the present paper, the properties of high crystal quality individual ZnO nanorods and nanorod arrays grown by the self-catalytic CVD method have been investigated to assess their possible applicationsfor U...
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| Format: | Article |
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MDPI AG
2021-06-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/13/3750 |
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| author | Arkady N. Redkin Eugene E. Yakimov Maria V. Evstafieva Eugene B. Yakimov |
| author_facet | Arkady N. Redkin Eugene E. Yakimov Maria V. Evstafieva Eugene B. Yakimov |
| author_sort | Arkady N. Redkin |
| collection | DOAJ |
| description | ZnO nanorods are promising materials for many applications, in particular for UV detectors. In the present paper, the properties of high crystal quality individual ZnO nanorods and nanorod arrays grown by the self-catalytic CVD method have been investigated to assess their possible applicationsfor UV photodetectors. X-ray diffraction, Raman spectroscopy and cathodoluminescence investigations demonstrate the high quality of nanorods. The nanorod resistivity and carrier concentration in dark is estimated. The transient photocurrent response of both as grown and annealed at 550 °C nanorod array under UV illumination pulses is studied. It is shown that annealing increases the sensitivity and decreases the responsivity that is explained by oxygen out-diffusion and the formation of near surface layer enriched with oxygen vacancies. Oxygen vacancy formation due to annealing is confirmed by an increase of green emission band intensity. |
| first_indexed | 2024-03-10T10:09:40Z |
| format | Article |
| id | doaj.art-5e58c2c847914904bcfe7a6d8155713a |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T10:09:40Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-5e58c2c847914904bcfe7a6d8155713a2023-11-22T01:16:43ZengMDPI AGEnergies1996-10732021-06-011413375010.3390/en14133750Grown and Characterization of ZnO Aligned Nanorod Arrays for Sensor ApplicationsArkady N. Redkin0Eugene E. Yakimov1Maria V. Evstafieva2Eugene B. Yakimov3Institute of Microelectronics Technology RAS, 6 Academician Ossipyan str., 142432 Chernogolovka, RussiaInstitute of Microelectronics Technology RAS, 6 Academician Ossipyan str., 142432 Chernogolovka, RussiaInstitute of Microelectronics Technology RAS, 6 Academician Ossipyan str., 142432 Chernogolovka, RussiaInstitute of Microelectronics Technology RAS, 6 Academician Ossipyan str., 142432 Chernogolovka, RussiaZnO nanorods are promising materials for many applications, in particular for UV detectors. In the present paper, the properties of high crystal quality individual ZnO nanorods and nanorod arrays grown by the self-catalytic CVD method have been investigated to assess their possible applicationsfor UV photodetectors. X-ray diffraction, Raman spectroscopy and cathodoluminescence investigations demonstrate the high quality of nanorods. The nanorod resistivity and carrier concentration in dark is estimated. The transient photocurrent response of both as grown and annealed at 550 °C nanorod array under UV illumination pulses is studied. It is shown that annealing increases the sensitivity and decreases the responsivity that is explained by oxygen out-diffusion and the formation of near surface layer enriched with oxygen vacancies. Oxygen vacancy formation due to annealing is confirmed by an increase of green emission band intensity.https://www.mdpi.com/1996-1073/14/13/3750ZnO nanorodself-catalytic CVD methodphotoresponsecathodoluminescence |
| spellingShingle | Arkady N. Redkin Eugene E. Yakimov Maria V. Evstafieva Eugene B. Yakimov Grown and Characterization of ZnO Aligned Nanorod Arrays for Sensor Applications Energies ZnO nanorod self-catalytic CVD method photoresponse cathodoluminescence |
| title | Grown and Characterization of ZnO Aligned Nanorod Arrays for Sensor Applications |
| title_full | Grown and Characterization of ZnO Aligned Nanorod Arrays for Sensor Applications |
| title_fullStr | Grown and Characterization of ZnO Aligned Nanorod Arrays for Sensor Applications |
| title_full_unstemmed | Grown and Characterization of ZnO Aligned Nanorod Arrays for Sensor Applications |
| title_short | Grown and Characterization of ZnO Aligned Nanorod Arrays for Sensor Applications |
| title_sort | grown and characterization of zno aligned nanorod arrays for sensor applications |
| topic | ZnO nanorod self-catalytic CVD method photoresponse cathodoluminescence |
| url | https://www.mdpi.com/1996-1073/14/13/3750 |
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