کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7938565 | 1513182 | 2018 | 32 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of metal work function and incorporation of Sr atom on WO3 thin films for MIS and MIM structured SBDs
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
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چکیده انگلیسی
In this work, two different structure of Cu/Sr-WO3/p-Si metal-insulator-semiconductor (MIS) and Cu/Sr-WO3/FTO metal-insulator-metal (MIM) Schottky barrier diodes (SBDs) fabricated with an insulating layer of pure tungsten trioxide (WO3) and Sr-WO3 thin films have been reported. The Sr-WO3 layer was coated separately, with different concentrations (0, 4, 8 and 12â¯wt %) of strontium (Sr) via jet nebulizer spray pyrolysis technique (JNSP) on the p-type silica wafer (p-Si) and fluorine doped tin oxide (FTO) substrates which are been optimized at 400â¯Â°C. The XRD analysis reveals the multiphase crystalline structures for 12â¯wt % of Sr-WO3 film with higher average crystallite size. FE-SEM images show the randomly oriented sub-microsized slab and seashell like structures. Higher surface roughness with improved grain size for 12â¯wt % of Sr-WO3 film. The presence of W, O and Sr atoms was confirmed by EDX spectra. In optical studies, Maximum absorption with minimum optical band gap was observed for 12â¯wt % of Sr-WO3 composite film. There was a linear increase in the electrical conductivity of the films with higher wt. % of Sr. Evidently the activation energy decreased with Sr concentration which is in accordance with the bandgap values. The fitting results of the measured I-V, reveal that MIS (SBDs) under illumination condition have minimum ideality factor (nâ¯=â¯2.39) and maximum barrier height (Φbâ¯=â¯0.57) values for higher concentration (12â¯wt %) of Sr film compared to MIM SBDs.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Superlattices and Microstructures - Volume 119, July 2018, Pages 134-149
Journal: Superlattices and Microstructures - Volume 119, July 2018, Pages 134-149
نویسندگان
R. Marnadu, J. Chandrasekaran, M. Raja, M. Balaji, S. Maruthamuthu, P. Balraju,