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Structural and electrical properties of semiconducting YBa2Cu3O6+x thin film by sol-gel for uncooled infrared detectors
- Authors
- Lee, Tae-Ho; Lee, Sung-Gap; Jeong, Jae-Woon
- Issue Date
- Apr-2015
- Publisher
- KOREAN ASSOC CRYSTAL GROWTH, INC
- Keywords
- Thin films; Sol-gel growth; Electrical properties; Electron microscopy(SEM)
- Citation
- JOURNAL OF CERAMIC PROCESSING RESEARCH, v.16, no.2, pp 188 - 192
- Pages
- 5
- Indexed
- SCI
SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF CERAMIC PROCESSING RESEARCH
- Volume
- 16
- Number
- 2
- Start Page
- 188
- End Page
- 192
- ISSN
- 1229-9162
2672-152X
- Abstract
- Uncooled pyroelectric infrared detectors based on semiconducting YBa2Cu3O6+x (YBCO) thin films were investigated. YBCO precursor solutions were prepared using the sol-gel method and YBCO films were fabricated by spin coating. The structural and electrical properties at varying annealing temperatures were studied. From differential thermal analysis and thermogravimetry (DTA-TG) results, an endothermic peak was observed at around 700 degrees C, due to the formation of a tetragonal phase. The crystal structure of the YBCO film annealed at 600 degrees C similar to 800 degrees C was a polycrystalline tetragonal phase. All specimens displayed a second phase (BaCO3). The YBCO film sintered at 700 degrees C showed a small grain size and smooth surface. The temperature resistance coefficient (TCR), responsivity and detectivity of the YBCO film sintered at 700 degrees C were -2.76%/degrees C at room temperature, 36.17V/W and 4.77 x 10(6) cmHz1/2W(-1), respectively.
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