Effect of spin coating speeds on electrical and optical characteristic of perovskite SrTiO3 thin films prepared by sol-gel method
The perovskite strontium titanate (SrTiO3/STO) was prepared by the sol-gel process, and the STO thin film was deposited onto a glass substrate by the spin coating method. Effect of different spin coating speeds on the thickness, structural, optical, and electrical properties of the STO thin films wa...
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2024-12-01
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| author | M.M. Osman Zeyad Almutairi Redhwan Almuzaiqer |
| author_facet | M.M. Osman Zeyad Almutairi Redhwan Almuzaiqer |
| author_sort | M.M. Osman |
| collection | DOAJ |
| description | The perovskite strontium titanate (SrTiO3/STO) was prepared by the sol-gel process, and the STO thin film was deposited onto a glass substrate by the spin coating method. Effect of different spin coating speeds on the thickness, structural, optical, and electrical properties of the STO thin films was discussed. Five STO films with various spin coating parameters of 2000, 4000, 6000, 8000, and 10000 RPM were prepared. Thickness profilometer tests have shown that the thickness of the STO film changes from 802 nm at 10000 RPM to 1321 nm at 2000 RPM spin coating speed. The prepared STO films morphology was examined by scanning electron microscope. X-ray diffraction measurements have shown that crystalline STO films have been produced with a cubic perovskite structure. The optical properties of the prepared STO films were investigated using an ultraviolet visible spectrophotometer, and the results indicated that the STO film at 8000 and 4000 RPM spin speed show the lowest and the maximum optical band gap (2.83 and 2.90 eV, respectively). All STO films have absorption coefficient values higher than 103 cm−1. The prepared STO thin films had a refractive index between 2.40 and 2.42. The electrical characteristics of the prepared STO films were investigated using the four-point probe method, and it was found that as the spin coating speed increased from 2000 to 8000 RPM, the resistivity of the STO films reduced from 6.629∗1010 to 3.009∗1010 Ω. Moreover, the STO film at 8000 RPM spin speed has the best electrical conductivity (3.301∗10−5 S m−1). |
| format | Article |
| id | doaj-art-249cc365052a453a8ed7f095ccfd7b82 |
| institution | OA Journals |
| issn | 2590-1230 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
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| series | Results in Engineering |
| spelling | doaj-art-249cc365052a453a8ed7f095ccfd7b822025-08-20T01:58:28ZengElsevierResults in Engineering2590-12302024-12-012410304610.1016/j.rineng.2024.103046Effect of spin coating speeds on electrical and optical characteristic of perovskite SrTiO3 thin films prepared by sol-gel methodM.M. Osman0Zeyad Almutairi1Redhwan Almuzaiqer2Sustainable Energy Technologies Center, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia; Physics Department, Faculty of Science (Boys Branch), Al-Azhar University, Cairo, Egypt; Corresponding author. Sustainable Energy Technologies Center, College of Engineering, King Saud University, Riyadh, Saudi Arabia.Sustainable Energy Technologies Center, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia; Mechanical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi ArabiaSustainable Energy Technologies Center, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia; Mechanical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi ArabiaThe perovskite strontium titanate (SrTiO3/STO) was prepared by the sol-gel process, and the STO thin film was deposited onto a glass substrate by the spin coating method. Effect of different spin coating speeds on the thickness, structural, optical, and electrical properties of the STO thin films was discussed. Five STO films with various spin coating parameters of 2000, 4000, 6000, 8000, and 10000 RPM were prepared. Thickness profilometer tests have shown that the thickness of the STO film changes from 802 nm at 10000 RPM to 1321 nm at 2000 RPM spin coating speed. The prepared STO films morphology was examined by scanning electron microscope. X-ray diffraction measurements have shown that crystalline STO films have been produced with a cubic perovskite structure. The optical properties of the prepared STO films were investigated using an ultraviolet visible spectrophotometer, and the results indicated that the STO film at 8000 and 4000 RPM spin speed show the lowest and the maximum optical band gap (2.83 and 2.90 eV, respectively). All STO films have absorption coefficient values higher than 103 cm−1. The prepared STO thin films had a refractive index between 2.40 and 2.42. The electrical characteristics of the prepared STO films were investigated using the four-point probe method, and it was found that as the spin coating speed increased from 2000 to 8000 RPM, the resistivity of the STO films reduced from 6.629∗1010 to 3.009∗1010 Ω. Moreover, the STO film at 8000 RPM spin speed has the best electrical conductivity (3.301∗10−5 S m−1).http://www.sciencedirect.com/science/article/pii/S259012302401301XPerovskiteSrTiO3Thin filmStructureOpticalBandgap |
| spellingShingle | M.M. Osman Zeyad Almutairi Redhwan Almuzaiqer Effect of spin coating speeds on electrical and optical characteristic of perovskite SrTiO3 thin films prepared by sol-gel method Results in Engineering Perovskite SrTiO3 Thin film Structure Optical Bandgap |
| title | Effect of spin coating speeds on electrical and optical characteristic of perovskite SrTiO3 thin films prepared by sol-gel method |
| title_full | Effect of spin coating speeds on electrical and optical characteristic of perovskite SrTiO3 thin films prepared by sol-gel method |
| title_fullStr | Effect of spin coating speeds on electrical and optical characteristic of perovskite SrTiO3 thin films prepared by sol-gel method |
| title_full_unstemmed | Effect of spin coating speeds on electrical and optical characteristic of perovskite SrTiO3 thin films prepared by sol-gel method |
| title_short | Effect of spin coating speeds on electrical and optical characteristic of perovskite SrTiO3 thin films prepared by sol-gel method |
| title_sort | effect of spin coating speeds on electrical and optical characteristic of perovskite srtio3 thin films prepared by sol gel method |
| topic | Perovskite SrTiO3 Thin film Structure Optical Bandgap |
| url | http://www.sciencedirect.com/science/article/pii/S259012302401301X |
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