A regrowth method for the fabrication of high-quality ZnO films and their application in fast-response UV sensors
| Autor: | Jae-Young Leem, Sung-O Kim, Gyeongjae Kim, Giwoong Nam, Sungsu Kim, Euije Jo, Jeong-Sik Son |
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| Rok vydání: | 2017 |
| Předmět: |
Photocurrent
Photoluminescence Fabrication business.industry General Physics and Astronomy Photodetector 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology medicine.disease_cause 01 natural sciences 0104 chemical sciences Quality (physics) Residual stress medicine Optoelectronics Nanorod 0210 nano-technology business Ultraviolet |
| Zdroj: | Journal of the Korean Physical Society. 71:47-53 |
| ISSN: | 1976-8524 0374-4884 |
| Popis: | In this study, we fabricated high-quality ZnO films using hydrothermally grown ZnO nanorods and a spin-coated Al-doped ZnO film by using regrowth method. The phtoluminescence (PL) intensity ratios of the near-band-edge (NBE) to deep-level (DL) emission peaks (I NBE /I DL ) for ZnO nanorods (samples 1) and ZnO film (sample 2) were 2.13 and 24.3, respectively. The redshift from 3.288 (sample 2) to 3.278 eV (sample 1) and low I NBE /I DL ratio in PL spectra were attributed to large mismatch between ZnO and Si substrate, resulting in a residual stress and the low optical properties. In case of sample 2, the photocurrent was sharply increased without the exponential rise because of enhanced optical properties of ZnO film by regrowth. The regrowth method is expected to represent a possible route for fast-response ultraviolet sensors. |
| Databáze: | OpenAIRE |
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