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Band gap narrowing and fluorescence properties of nickel doped SnO2 nanoparticles |
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| Authors: | Arham S Ahmed ML Singla Alim H Naqvi |
| Institution: | a Centre of Excellence in Materials Science (Nanomaterials), Department of Applied Physics, Z. H. College of Engineering & Technology, Aligarh Muslim University, Aligarh-202002, India b Central Scientific Instruments Organization (CSIO), Council of Scientific & Industrial Research (CSIR), Materials Research and Bio-Nanotechnology Division, ector − 30/C, Chandigarh-160030, India c Department of Chemistry, Aligarh Muslim University, Aligarh-202002, India |
| Abstract: | Nickel-doped tin oxide nanoparticles (sub-5 nm size) with intense fluorescence emission behavior have been synthesized by sol-gel route. The structural and compositional analysis has been carried out by using XRD, TEM, FESEM and EDAX. The optical absorbance spectra indicate a band gap narrowing effect and it was found to increase with the increase in nickel concentration. The band gap narrowing at low dopant concentration (<5%) can be assigned to SnO2−SnO2−x alloying effect and for higher doping it may be due to the formation of defect sub-bands below the conduction band. |
| Keywords: | Tin oxide nanoparticles Sol-gel XRD Band gap Fluorescence |
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